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Boron (B) is an essential nutrient for plant growth and development, exhibiting extremely narrow margins between deficiency and toxicity. B toxicity is devastating for productivity and apparent for a continuously increasing part of agricultural land, under the influence of on-going climate change. In this study, the effects of increased B supply (by using H3BO3) were addressed by examining critical physiological responses of young and mature leaves, which were devoid of toxicity symptoms, in two melon varieties (Armenian cucumbers, cantaloupes). B was primarily translocated through the transpiration stream, and secondarily via the active cell membrane transport system. The B distribution pattern was independent of leaf age, and remained rather unchanged under increased B supply. Armenian cucumbers, exhibiting higher leaf B levels, underwent an enhanced adverse impact on (root and shoot) growth, photosynthetic pigment content, cellular membrane integrity, and also exhibited attenuated antioxidant defense stimulation. Notably, and unlike other abiotic stressors, no evidence of B toxicity-induced systemic reaction was apparent. B toxicity greatly enhanced the transcription of the genes coding for borate influx and efflux channels, an effect that was mostly evident in mature leaves. In conclusion, shoot physiological responses to B toxicity are highly localized. Moreover, the obstruction of the diffusion and the B translocation to the aerial organs under increased B supply is genotype-dependent, governing plant physiological responses.
Theocharis Chatzistathis; Dimitrios Fanourakis; Sasan Aliniaeifard; Anastasios Kotsiras; Costas Delis; Georgios Tsaniklidis. Leaf Age-Dependent Effects of Boron Toxicity in Two Cucumis melo Varieties. Agronomy 2021, 11, 759 .
AMA StyleTheocharis Chatzistathis, Dimitrios Fanourakis, Sasan Aliniaeifard, Anastasios Kotsiras, Costas Delis, Georgios Tsaniklidis. Leaf Age-Dependent Effects of Boron Toxicity in Two Cucumis melo Varieties. Agronomy. 2021; 11 (4):759.
Chicago/Turabian StyleTheocharis Chatzistathis; Dimitrios Fanourakis; Sasan Aliniaeifard; Anastasios Kotsiras; Costas Delis; Georgios Tsaniklidis. 2021. "Leaf Age-Dependent Effects of Boron Toxicity in Two Cucumis melo Varieties." Agronomy 11, no. 4: 759.
Calcium preharvest application influences fruit quality. The impact of preharvest foliar sprays using several commercial fertilizers with Ca content on the fruit quality and nutritional status of the kiwi cv. ‘Hayward’ was investigated for a 2-year period. Fruit flesh firmness increased under all Ca sprays compared to the control. Total soluble solids and acidity were not altered significantly by any of the studied Ca products. Treatment differences with regard to fruit firmness, soluble solids concentration and acids at harvest were maintained during cold storage for 2 and 4 months. Foliar sprays did not affect the N, P, K, Mg, B, Fe, Mn and Zn concentrations of leaves and fruits. However, all treatments increased the concentration of Ca in leaves and fruits compared to the control.
Thomas Sotiropoulos; Antonios Voulgarakis; Dionisios Karaiskos; Theocharis Chatzistathis; Ioannis Manthos; Olga Dichala; Areti Mpountla. Foliar Calcium Fertilizers Impact on Several Fruit Quality Characteristics and Leaf and Fruit Nutritional Status of the ‘Hayward’ Kiwifruit Cultivar. Agronomy 2021, 11, 235 .
AMA StyleThomas Sotiropoulos, Antonios Voulgarakis, Dionisios Karaiskos, Theocharis Chatzistathis, Ioannis Manthos, Olga Dichala, Areti Mpountla. Foliar Calcium Fertilizers Impact on Several Fruit Quality Characteristics and Leaf and Fruit Nutritional Status of the ‘Hayward’ Kiwifruit Cultivar. Agronomy. 2021; 11 (2):235.
Chicago/Turabian StyleThomas Sotiropoulos; Antonios Voulgarakis; Dionisios Karaiskos; Theocharis Chatzistathis; Ioannis Manthos; Olga Dichala; Areti Mpountla. 2021. "Foliar Calcium Fertilizers Impact on Several Fruit Quality Characteristics and Leaf and Fruit Nutritional Status of the ‘Hayward’ Kiwifruit Cultivar." Agronomy 11, no. 2: 235.
One of the most challenging topics for the sustainable agriculture is how to decrease high fertilization rates. A pot experiment, exploring the effects of zeolite (ZEO) and/or vermiculite (VER) as soil amendments, comparing to the soil application of a controlled release fertilizer (CRF), was realized in chestnut plants. Various parameters related to soil fertility, and plant growth, nutrition, and physiology were investigated to gain knowledge towards more sustainable management. After ZEO application and in comparison to CRF, an impressive boost in soil K was achieved. Moreover, soil P and Zn levels were higher in the VER-treated soil, compared to CRF. Leaf K and Ca concentrations were significantly higher in ZEO, compared to the VER treatment; the highest foliar N and Zn concentrations were measured in CRF and VER, respectively. However, significantly lower foliar Mn and Cu were found in VER. The highest root biomass produced in the ZEO treated plants. For most nutrients, their total uptake per plant was higher in CRF and ZEO. Finally, photosynthetic rates were higher in VER (mainly due to non-stomatal factors) and CRF (mainly due to stomatal factors). Our data open a discussion towards the application of ZEO and/or VER as soil amendments in chestnut nurseries and orchards, aiming at partially decreasing fertilization rates and boosting sustainable nutrient management.
Theocharis Chatzistathis; Evgenia Papaioannou; Anastasia Giannakoula; Ioannis E. Papadakis. Zeolite and Vermiculite as Inorganic Soil Amendments Modify Shoot-Root Allocation, Mineral Nutrition, Photosystem II Activity and Gas Exchange Parameters of Chestnut (Castanea sativa Mill) Plants. Agronomy 2021, 11, 109 .
AMA StyleTheocharis Chatzistathis, Evgenia Papaioannou, Anastasia Giannakoula, Ioannis E. Papadakis. Zeolite and Vermiculite as Inorganic Soil Amendments Modify Shoot-Root Allocation, Mineral Nutrition, Photosystem II Activity and Gas Exchange Parameters of Chestnut (Castanea sativa Mill) Plants. Agronomy. 2021; 11 (1):109.
Chicago/Turabian StyleTheocharis Chatzistathis; Evgenia Papaioannou; Anastasia Giannakoula; Ioannis E. Papadakis. 2021. "Zeolite and Vermiculite as Inorganic Soil Amendments Modify Shoot-Root Allocation, Mineral Nutrition, Photosystem II Activity and Gas Exchange Parameters of Chestnut (Castanea sativa Mill) Plants." Agronomy 11, no. 1: 109.
Often, from soil and plant tissue analyses, over-sufficient foliar P levels in olive trees, grown under low Olsen P availability, are determined. In order to deepen our knowledge in this topic, a field P fertilization experiment (with or without supply of the fertilizer 0-46-0) with 25-year-old olive trees was conducted, in order to investigate if: i) soil organic P was a sufficient 'pool' to satisfy the P nutritional needs of mature, fully productive, olive trees under low Olsen P availability and sufficient organic matter content, ii) the activities of acid and alkaline phosphatase were enhanced under low Olsen P availability, iii) soil chemical properties were significantly influenced by P fertilization, iv) significant differences in foliar nutrition of olive trees existed between P-fertilized (+P) and unfertilized (-P) trees. Our results indicated that in the -P plots 48 % of the total soil P was in organic fraction, while in the + P ones approximately 23 % of the total P was in organic form. In contrast, Olsen, inorganic and total P fractions were significantly higher in the + P plots. In addition, in the + P plots significantly lower: i) soil Fe, Mn and Zn, and ii) foliar Ca, Mg and Mn concentrations were determined, while, in contrast, iii) higher leaf K concentration was found. Foliar P was not influenced by P fertilization, while at the same time, both the activities of alkaline and acid phosphatase were significantly higher in the –P plots, compared to those received P fertilization. Overall, the kind of management of olive groves (sufficient organic matter levels, with or without inorganic P fertilization inputs) significantly influences P dynamics and modifies its fractions in soils, while it also affects organic P mineralization and supports P nutrition for olive trees. It is believed that these data reveal the crucial role of organic matter to sustain P uptake and contribute towards a sustainable management of olive groves to support and sufficiently satisfy the P nutritional needs of olive trees, by also significantly reducing the unnecessary annual P fertilizer inputs.
T. Chatzistathis; N. Monokrousos; P. Psoma; Panagiotis Tziachris; I. Metaxa; G. Strikos; F.H. Papadopoulos; Nikolaos Monokrousos. How fully productive olive trees (Olea europaea L., cv. 'Chondrolia Chalkidikis') manage to over-satisfy their P nutritional needs under low Olsen P availability in soils? Scientia Horticulturae 2020, 265, 109251 .
AMA StyleT. Chatzistathis, N. Monokrousos, P. Psoma, Panagiotis Tziachris, I. Metaxa, G. Strikos, F.H. Papadopoulos, Nikolaos Monokrousos. How fully productive olive trees (Olea europaea L., cv. 'Chondrolia Chalkidikis') manage to over-satisfy their P nutritional needs under low Olsen P availability in soils? Scientia Horticulturae. 2020; 265 ():109251.
Chicago/Turabian StyleT. Chatzistathis; N. Monokrousos; P. Psoma; Panagiotis Tziachris; I. Metaxa; G. Strikos; F.H. Papadopoulos; Nikolaos Monokrousos. 2020. "How fully productive olive trees (Olea europaea L., cv. 'Chondrolia Chalkidikis') manage to over-satisfy their P nutritional needs under low Olsen P availability in soils?" Scientia Horticulturae 265, no. : 109251.
Organic fertilization has been proposed as an alternative method, in the frame of sustainable agriculture, to enhance soil fertility and satisfy the nutritional needs of crops, without the input of chemical fertilizers. A six-month pot experiment, with 3 soil amendments, used as organic fertilizers (cow manure-CM, goat manure-GM, and their mixture, i.e. CM + GM) and a controlled release fertilizer (CRF) was conducted, in order to investigate if the growth, nutrient uptake, photosystem II (PSII) activity, photosynthetic rate and total sugars of Olea europaea L. (cv. ‘Koroneiki’) plants were influenced by the kind of fertilization. The highest plant biomass, macronutrient content and PSII activity were found in the CRF treatment. In contrast, significantly lower photosynthetic and transpiration rates were recorded in the CRF due to the lower stomatal conductance. Translocated sugars were higher in the CM + GM treatment, while total sugar concentration did not significantly differ among the treatments. Despite the highest content of all macronutrients, Fe and Mn recorded in the CRF, the lowest foliar P, K, Mg, Zn and Cu concentrations revealed that the higher nutrient accumulation, compared to the organic treatments, should be ascribed to the higher plant biomass, rather than to higher nutrient uptake. From the above data, it is clear that the kind of organic/inorganic fertilization significantly influenced soil organic C content, fertility, growth, nutrient uptake and the physiology of olive plants. Thus, the kind of manure(s) used to enhance soil fertility and support crop production should be seriously taken into consideration by the olive growers before its/their use.
T. Chatzistathis; I.E. Papadakis; A. Papaioannou; C. Chatzissavvidis; A. Giannakoula. Comparative study effects between manure application and a controlled-release fertilizer on the growth, nutrient uptake, photosystem II activity and photosynthetic rate of Olea europaea L. (cv. ‘Koroneiki’). Scientia Horticulturae 2020, 264, 109176 .
AMA StyleT. Chatzistathis, I.E. Papadakis, A. Papaioannou, C. Chatzissavvidis, A. Giannakoula. Comparative study effects between manure application and a controlled-release fertilizer on the growth, nutrient uptake, photosystem II activity and photosynthetic rate of Olea europaea L. (cv. ‘Koroneiki’). Scientia Horticulturae. 2020; 264 ():109176.
Chicago/Turabian StyleT. Chatzistathis; I.E. Papadakis; A. Papaioannou; C. Chatzissavvidis; A. Giannakoula. 2020. "Comparative study effects between manure application and a controlled-release fertilizer on the growth, nutrient uptake, photosystem II activity and photosynthetic rate of Olea europaea L. (cv. ‘Koroneiki’)." Scientia Horticulturae 264, no. : 109176.
Imbalanced Ca/Mg and excess Ni (due to serpentine stress) are limiting factors for plant productivity. The purpose of this study was to investigate if growth, nutrient uptake, PSII activity, photosynthesis and antioxidant activity of pomegranate (Punica granatum L., cv. Granada) plants were affected by serpentine stress. Pomegranate plants were grown in soil substrates from parent material marl (control), serpentine and serpentinized peridotite. Plant height, leaf, stem, root and total plant dry weight, as well as foliar N, P, K, Ca, Zn, Cu, chlorophyll content, fluorescence parameters, photosynthetic rate, and internal water use efficiency (WUEi) were significantly lower for the plants grown in the serpentinized peridotite soil. In contrast, higher ferric reducing antioxidant power (FRAP), total phenolics and total flavonoid content (TFC) levels were found in the serpentinized peridotite soil. The insignificant differences between the marl and serpentine soils in plant growth, PSII activity, photosynthesis and nutrient uptake indicated that P. granatum could tolerate a mild (not with extremely high Ni) serpentine stress. However, P. granatum could not tolerate stress showing excess Mg and imbalanced Ca/Mg, as found for the serpentinized soil of our study.
T. Chatzistathis; A. Papaioannou; Olga Dichala; A. Giannakoula; S. Kostas. Imbalanced Ca/Mg and Ni excess effects on the growth, nutrient uptake, photosynthesis and antioxidant response of Punica granatum (cv. Granada) plants. South African Journal of Botany 2019, 127, 188 -194.
AMA StyleT. Chatzistathis, A. Papaioannou, Olga Dichala, A. Giannakoula, S. Kostas. Imbalanced Ca/Mg and Ni excess effects on the growth, nutrient uptake, photosynthesis and antioxidant response of Punica granatum (cv. Granada) plants. South African Journal of Botany. 2019; 127 ():188-194.
Chicago/Turabian StyleT. Chatzistathis; A. Papaioannou; Olga Dichala; A. Giannakoula; S. Kostas. 2019. "Imbalanced Ca/Mg and Ni excess effects on the growth, nutrient uptake, photosynthesis and antioxidant response of Punica granatum (cv. Granada) plants." South African Journal of Botany 127, no. : 188-194.
Theocharis Chatzistathis; A. Papaioannou. Correlations Between Soil Exchangeable Ca2+, Mg2+, K+ and Foliar Nutrient Concentrations in Mature Biological Olive Groves (Olea europaea L., cv. ‘Chondrolia Chalkidikis’). Communications in Soil Science and Plant Analysis 2019, 50, 492 -501.
AMA StyleTheocharis Chatzistathis, A. Papaioannou. Correlations Between Soil Exchangeable Ca2+, Mg2+, K+ and Foliar Nutrient Concentrations in Mature Biological Olive Groves (Olea europaea L., cv. ‘Chondrolia Chalkidikis’). Communications in Soil Science and Plant Analysis. 2019; 50 (4):492-501.
Chicago/Turabian StyleTheocharis Chatzistathis; A. Papaioannou. 2019. "Correlations Between Soil Exchangeable Ca2+, Mg2+, K+ and Foliar Nutrient Concentrations in Mature Biological Olive Groves (Olea europaea L., cv. ‘Chondrolia Chalkidikis’)." Communications in Soil Science and Plant Analysis 50, no. 4: 492-501.
It was investigated if differential genotypic tolerance of two pomegranate cultivars (‘Wonderful’ and ‘Acco’) to serpentine stress existed. For this purpose, pomegranate plants were grown outdoors, in three soil substrates (from parent material marl, serpentine and serpentinized peridotite). The results indicated that growth, most foliar nutrient concentrations, total chlorophyll content, chlorophyll fluorescence and photosynthetic rate, for both genotypes, were significantly lower in the serpentinized peridotite soil (severe stress). In contrast, higher levels of total phenolics, total flavonoid content (TFC) and FRAP, were found in the serpentinized soil. Lower tolerance index to stress in the serpentinized soil was found for the cultivar ‘Acco’, than for ‘Wonderful’. Overall, the physiological and antioxidant response of ‘Acco’ was worse, than that of ‘Wonderful’, under serpentine stress. In conclusion, despite the lower Ni, Cr and Mg accumulation of ‘Acco’ (compared to ‘Wonderful’), its lower tolerance indices in the serpentinized soil probably shows its higher tissue sensibility to serpentine stress. Thus, this genotype should not be preferred for cultivation in soils presenting high degree of serpentinization (excess Mg concentrations). In contrast, from the tolerance indices of both genotypes in the serpentine soil, it is concluded that a mild stress existed in this case.
T. Chatzistathis; I.E. Papadakis; A. Papaioannou; Olga Dichala; A. Giannakoula; S. Kostas; Panagiotis Tziachris. Genotypic tolerance of two Punica granatum L. cultivars (‘Wonderful’ and ‘Acco’) to serpentine stress. Scientia Horticulturae 2018, 247, 344 -355.
AMA StyleT. Chatzistathis, I.E. Papadakis, A. Papaioannou, Olga Dichala, A. Giannakoula, S. Kostas, Panagiotis Tziachris. Genotypic tolerance of two Punica granatum L. cultivars (‘Wonderful’ and ‘Acco’) to serpentine stress. Scientia Horticulturae. 2018; 247 ():344-355.
Chicago/Turabian StyleT. Chatzistathis; I.E. Papadakis; A. Papaioannou; Olga Dichala; A. Giannakoula; S. Kostas; Panagiotis Tziachris. 2018. "Genotypic tolerance of two Punica granatum L. cultivars (‘Wonderful’ and ‘Acco’) to serpentine stress." Scientia Horticulturae 247, no. : 344-355.
This paper assesses hybrid spatial models with the use of auxiliary variables based on machine learning algorithms for predicting soil Organic Matter (OM) content in Kastoria area (Greece). The machine learning methods that are used are random forests (RF) and gradient boosting (GB), also called ensemble methods, which combine multiple Classification and Regression Trees (CART). Overall, the different methods evaluated in the current study are Ordinary Kriging (OK), Regression Kriging (RK), Random Forest (RF), Random Forest Kriging (RFK), Gradient Boosting (GB) and Gradient Boosting Kriging (GBK). According to the findings of the study, machine learning methods (RF and GB) improve the prediction accuracy. The improvement ranged from 6% to 9% for RMSE, 47% to 250% for R2 and 4% to 11% for MAE. Moreover, the introduction of residuals' kriging (hybrid methods), increases the accuracy of predictions furthermore (from 1% to 34%). It is also interesting that the measured collocated soil parameters that are used as auxiliary variables have consistently more influence (increased Pearson correlation coefficient for MLR and importance for RF and GB) than the environmental parameters. The main reason could be the flat terrain and the rather homogenous study area that minimizes the effect of topography on the soils. Therefore, topography and spatial characteristics of an area should be considered in design phase, in order to choose the appropriate secondary information in soil parameters' prediction.
Panagiotis Tziachris; Vassilis Aschonitis; Theocharis Chatzistathis; Maria Papadopoulou. Assessment of spatial hybrid methods for predicting soil organic matter using DEM derivatives and soil parameters. CATENA 2018, 174, 206 -216.
AMA StylePanagiotis Tziachris, Vassilis Aschonitis, Theocharis Chatzistathis, Maria Papadopoulou. Assessment of spatial hybrid methods for predicting soil organic matter using DEM derivatives and soil parameters. CATENA. 2018; 174 ():206-216.
Chicago/Turabian StylePanagiotis Tziachris; Vassilis Aschonitis; Theocharis Chatzistathis; Maria Papadopoulou. 2018. "Assessment of spatial hybrid methods for predicting soil organic matter using DEM derivatives and soil parameters." CATENA 174, no. : 206-216.
The disposal of olive mill wastewater (OMW) is a serious environmental issue for the Mediterranean countries. However, there is still no common European legislation on the management and the re-use of OMW in agriculture, in the frame of sustainable crop management and the standards for the safe OMW disposal and re-use are left to be set by each EU country, individually. This review paper presents the most effective and sustainable practices for OMW, (treatment, application and management), which can maximize the benefits of OMW on crops and soils, while minimizing the potential hazards for public health, thus promoting environmental sustainability. The findings of this synthetic work suggest that there is enough information and proven sustainable practices to go ahead with the initial formulation of a new consensual framework, environmentally acceptable, socially bearable and economically viable, that could hopefully help to set the standards for the re-use of olive mil wastewater and can lead to a common EU policy on the management and re-use of OMW.
T.M. Koutsos; Theocharis Chatzistathis; E.I. Balampekou. A new framework proposal, towards a common EU agricultural policy, with the best sustainable practices for the re-use of olive mill wastewater. Science of The Total Environment 2018, 622-623, 942 -953.
AMA StyleT.M. Koutsos, Theocharis Chatzistathis, E.I. Balampekou. A new framework proposal, towards a common EU agricultural policy, with the best sustainable practices for the re-use of olive mill wastewater. Science of The Total Environment. 2018; 622-623 ():942-953.
Chicago/Turabian StyleT.M. Koutsos; Theocharis Chatzistathis; E.I. Balampekou. 2018. "A new framework proposal, towards a common EU agricultural policy, with the best sustainable practices for the re-use of olive mill wastewater." Science of The Total Environment 622-623, no. : 942-953.
Manganese (Mn) is one of the most important essential micronutrients for plant metabolism and growth, and especially for photosynthesis. It activates more than 35 enzymes and affects root growth. Manganese is taken up by plants as Mn2 +, or as organic complex in calcareous soils. Both Mn uptake and utilization efficiency (MnUE) are influenced by genotype and rootstock. On the other hand, Nickel (Ni) is also an essential micronutrient for urea assimilation and N metabolism. Urease is an essential enzyme for urea assimilation in plants, and in cases of Ni deprivation its activity is decreased. In addition, glutamine synthetase is also involved in urea and N metabolism and it is influenced by Ni availability. Nickel is usually taken up as Ni2 +. Finally, although Cobalt (Co) is not an essential plant metabolism nutrient, it is considered as a beneficial element, participating in symbiotic N fixation. It is taken by plants as Co2 +. The physiological roles of Ni, Mn, and Co for plant metabolism and growth, their uptake, together with the utilization efficiency, and transport mechanisms for crop plants are fully presented and discussed in this review.
Theocharis Chatzistathis. Physiological Importance of Manganese, Cobalt and Nickel and the Improvement of Their Uptake and Utilization by Plants. Plant Micronutrient Use Efficiency 2018, 123 -135.
AMA StyleTheocharis Chatzistathis. Physiological Importance of Manganese, Cobalt and Nickel and the Improvement of Their Uptake and Utilization by Plants. Plant Micronutrient Use Efficiency. 2018; ():123-135.
Chicago/Turabian StyleTheocharis Chatzistathis. 2018. "Physiological Importance of Manganese, Cobalt and Nickel and the Improvement of Their Uptake and Utilization by Plants." Plant Micronutrient Use Efficiency , no. : 123-135.
Organic farming has been proposed as an alternative agricultural system to help solve environmental problems, like the sustainable management of soil micronutrients, without inputs of chemical fertilizers. The purposes of this study were: i) to assess Fe, Mn, Zn and Cu bioavailability through the determination of sequentially extracted chemical forms (fractions) and their correlation with foliar micronutrient concentrations in mature organic olive (cv. 'Chondrolia Chalkidikis') groves; ii) to determine the soil depth and the available forms (fractions) by which the 4 metals are taken up by olive trees. DTPA extractable (from the soil layers 0-20, 20-40 and 40-60 cm) and foliar micronutrient concentrations were determined in two organic olive groves. Using the Tessier fractionation, five fractions, for all the metals, were found: exchangeable, bound to carbonates (acid-soluble), bound to Fe-Mn oxides (reducible), organic (oxidizable), as well as residual form. Our results indicated that Fe was taken up by the olive trees as organic complex, mainly from the soil layer 40-60 cm. Manganese was taken up from the exchangeable fraction (0-20 cm); Zinc was taken up as organic complex from the layers 0-20 and 40-60 cm, as well as in the exchangeable form from the upper 20 cm. Copper was taken up from the soil layers 0-20 and 40-60 cm as soluble organic complex, and as exchangeable ion from the upper 20 cm. Our data reveal the crucial role of organic matter to sustain metal (Fe, Zn and Cu) uptake -as soluble complexes-by olive trees, in mature organic groves grown on calcareous soils; it is also expected that these data will constitute a thorough insight and useful tool towards a successful nutrient and organic C management for organic olive groves, since no serious nutritional deficiencies were found.
T. Chatzistathis; A. Papaioannou; D. Gasparatos; A. Molassiotis. From which soil metal fractions Fe, Mn, Zn and Cu are taken up by olive trees ( Olea europaea L., cv. ‘Chondrolia Chalkidikis’) in organic groves? Journal of Environmental Management 2017, 203, 489 -499.
AMA StyleT. Chatzistathis, A. Papaioannou, D. Gasparatos, A. Molassiotis. From which soil metal fractions Fe, Mn, Zn and Cu are taken up by olive trees ( Olea europaea L., cv. ‘Chondrolia Chalkidikis’) in organic groves? Journal of Environmental Management. 2017; 203 ():489-499.
Chicago/Turabian StyleT. Chatzistathis; A. Papaioannou; D. Gasparatos; A. Molassiotis. 2017. "From which soil metal fractions Fe, Mn, Zn and Cu are taken up by olive trees ( Olea europaea L., cv. ‘Chondrolia Chalkidikis’) in organic groves?" Journal of Environmental Management 203, no. : 489-499.
After forest harvesting, organic matter accumulation and soil nutrient availability are usually negatively influenced, especially during the first years. The hypothesis that 15 years after selective harvesting (15Y) the increased forest biomass, together with the enhanced nutrient recycling rates, compared to 5-years after harvesting (5Y), could restore nutrient availability and organic C accumulation (both in forest floor and soil) to similar levels to the intact site, was tested. The aim of this study was to investigate the effect of the timing of management practices (intact forest-control, 5Y, 15Y) on organic matter content, nutrient concentrations in needles, forest floor and soil, in a forest ecosystem of Picea abies L., in Rodopi mountainous area, in northern Greece. Significant differences between the intact site and the other two treatments were found in: i) soil N, P, C/N and exchangeable Ca, ii) organic matter and nutrient accumulation (basically in the upper 30 cm), iii) foliar K, Fe and Zn concentrations. In conclusion: i) forest management practices clearly influenced soil fertility and organic matter accumulation, ii) 15 years after selective harvesting nutrient and organic C accumulation in forest floor, as well as K and Fe accumulation in soil were restored to similar levels to the intact sites; thus, our hypothesis was partially correct.
Evgenia Papaioannou; Theocharis Chatzistathis; Georgios Menexes. The Impact of Management Practices on Soil Fertility and Foliar Nutrient Concentrations in a Spruce (Picea abies Link) Forest Ecosystem of Rodopi Mountainous Area, in Northern Greece. Notulae Botanicae Horti Agrobotanici Cluj-Napoca 2017, 46, 301 -308.
AMA StyleEvgenia Papaioannou, Theocharis Chatzistathis, Georgios Menexes. The Impact of Management Practices on Soil Fertility and Foliar Nutrient Concentrations in a Spruce (Picea abies Link) Forest Ecosystem of Rodopi Mountainous Area, in Northern Greece. Notulae Botanicae Horti Agrobotanici Cluj-Napoca. 2017; 46 (1):301-308.
Chicago/Turabian StyleEvgenia Papaioannou; Theocharis Chatzistathis; Georgios Menexes. 2017. "The Impact of Management Practices on Soil Fertility and Foliar Nutrient Concentrations in a Spruce (Picea abies Link) Forest Ecosystem of Rodopi Mountainous Area, in Northern Greece." Notulae Botanicae Horti Agrobotanici Cluj-Napoca 46, no. 1: 301-308.
Theocharis Chatzistathis; Thomas Koutsos. Olive mill wastewater as a source of organic matter, water and nutrients for restoration of degraded soils and for crops managed with sustainable systems. Agricultural Water Management 2017, 190, 55 -64.
AMA StyleTheocharis Chatzistathis, Thomas Koutsos. Olive mill wastewater as a source of organic matter, water and nutrients for restoration of degraded soils and for crops managed with sustainable systems. Agricultural Water Management. 2017; 190 ():55-64.
Chicago/Turabian StyleTheocharis Chatzistathis; Thomas Koutsos. 2017. "Olive mill wastewater as a source of organic matter, water and nutrients for restoration of degraded soils and for crops managed with sustainable systems." Agricultural Water Management 190, no. : 55-64.
T. Chatzistathis; A. Delviniotis; A. Panagakos; A. Giannakoula; V. Tranaka; A. Molassiotis. Foliar manganese, zinc and boron application effects on mineral nutrition of an experimental olive grove (cv. “Chondrolia Chalkidikis”). Journal of Plant Nutrition 2017, 40, 1728 -1742.
AMA StyleT. Chatzistathis, A. Delviniotis, A. Panagakos, A. Giannakoula, V. Tranaka, A. Molassiotis. Foliar manganese, zinc and boron application effects on mineral nutrition of an experimental olive grove (cv. “Chondrolia Chalkidikis”). Journal of Plant Nutrition. 2017; 40 (12):1728-1742.
Chicago/Turabian StyleT. Chatzistathis; A. Delviniotis; A. Panagakos; A. Giannakoula; V. Tranaka; A. Molassiotis. 2017. "Foliar manganese, zinc and boron application effects on mineral nutrition of an experimental olive grove (cv. “Chondrolia Chalkidikis”)." Journal of Plant Nutrition 40, no. 12: 1728-1742.
V. Tsabarducas; T. Chatzistathis; I. Therios; A. Patakas. How nitrogen form and concentration affect growth, nutrient accumulation and photosynthetic performance of Olea europaea L. (cv. ‘Kalamon’). Scientia Horticulturae 2017, 218, 23 -29.
AMA StyleV. Tsabarducas, T. Chatzistathis, I. Therios, A. Patakas. How nitrogen form and concentration affect growth, nutrient accumulation and photosynthetic performance of Olea europaea L. (cv. ‘Kalamon’). Scientia Horticulturae. 2017; 218 ():23-29.
Chicago/Turabian StyleV. Tsabarducas; T. Chatzistathis; I. Therios; A. Patakas. 2017. "How nitrogen form and concentration affect growth, nutrient accumulation and photosynthetic performance of Olea europaea L. (cv. ‘Kalamon’)." Scientia Horticulturae 218, no. : 23-29.
Two sustainable management models were studied, in order to investigate if they were successful in satisfying the nutritional needs of mature olive groves (20 year-old olive trees- Olea europaea, cv. ‘Koroneiki’), situated in two geographical regions of Greece (Thessaloniki, Central Macedonia, Northern Greece, and Corfu, Ionian Islands, Western Greece). Nutrient supply in both olive orchards was based, during the last 20 years, on pruning material recycling, as well as on cow manure (8 t/ha/year, in the grove of Corfu) and patent kali (5 kg/tree/year, in the grove of Thessaloniki) application. Soil analysis revealed that pH was slightly alkaline in the olive grove of Thessaloniki and acidic (6.00–6.34) in the olive orchard of Corfu; organic matter content was approximately two times greater in the grove of Corfu. Exchangeable Ca concentrations in deeper soil layers (20–40 and 40–60 cm) of the olive orchard of Thessaloniki were approximately two times greater, compared to those found in the grove of Corfu. In contrast, 2–14.5 times greater K exchangeable concentrations, but only in deeper layers (20–40 and 40–60 cm), were found in the grove of Corfu. DTPA extractable Fe, Mn and Zn concentrations were 9–14, 3–5, and 3–5.5 times greater (depending on soil layer) in the olive orchard of Corfu, compared to those found in Thessaloniki. Leaf K concentrations were significantly greater in the grove of Corfu (1.2–1.4% d.w.), while Fe concentrations in the same olive orchard exceeded 120 ppm. Generally, most of the leaf nutrient concentrations for both groves were within the normal levels of sufficiency, or within the over-sufficiency range (e.g. those of N and K in the grove of Corfu, and P in both olive orchards). Only leaf B concentrations in January (17–19 p.p.m.), in both orchards, and leaf Mn levels in the grove of Corfu were slightly (but not seriously) deficient to marginal. Consequently, it can be concluded that both studied sustainable management models for mature olive groves (no soil tillage, pruning material and weed cuts recycling, in addition to: (i) patent kali, or (ii) manure supply) were successful. Thus, the two models are commercially and environmentally sustainable for olive cultivation, especially in marginal, degraded, and/or hilly Mediterranean areas. Finally, they are of great socioeconomic importance in specific rural areas (where olive-growers combine olive oil production with domestic animal breeding).
T. Chatzistathis; A. Tsiolis; A. Papaioannou; V. Tsirakoglou; A. Molassiotis. Can sustainable management models for olive groves adequately satisfy their nutritional needs? Scientia Horticulturae 2016, 207, 48 -56.
AMA StyleT. Chatzistathis, A. Tsiolis, A. Papaioannou, V. Tsirakoglou, A. Molassiotis. Can sustainable management models for olive groves adequately satisfy their nutritional needs? Scientia Horticulturae. 2016; 207 ():48-56.
Chicago/Turabian StyleT. Chatzistathis; A. Tsiolis; A. Papaioannou; V. Tsirakoglou; A. Molassiotis. 2016. "Can sustainable management models for olive groves adequately satisfy their nutritional needs?" Scientia Horticulturae 207, no. : 48-56.
Nutrient availability affects root growth. The effect of potassium (K) level on the root growth, weight, and elongation, as well as on nutrient content of the olive genotypes “Megaritiki,” “wild” olive, “Chondrolia Chalkidikis,” “Biancolilla,” and K utilization efficiency was investigated. For this purpose, a greenhouse experiment was carried out in the farm of the Aristotle University of Thessaloniki. Three treatments were used: T1, that is, 25% modified Hoagland nutrient solution without K in distilled water, T2: 25% modified Hoagland nutrient solution with 0.2 mM K in distilled water, and T3: 25% modified Hoagland nutrient solution with 1.5 mM K in distilled water. K concentration had no significant effect on root growth of olive genotypes. The maximum root elongation was observed in the “wild olive,” in the T3 treatment, and the minimum in “Biancolilla,” in the T1 treatment. K utilization efficiency significantly differed between K treatments for the same genotype, as well as among genotypes for the same K treatment, following the order: Megaritiki > wild olive > Chondrolia Chalkidikis > Biancolilla. Finally, significant differences were found with regard to the effect of K treatment and olive genotype on many macronutrient and micronutrient concentrations in leaves and roots.
A. Saykhul; T. Chatzistathis; Christos Chatzissavvidis; I. Therios; George Menexes. Root growth of cultivated and “wild” olive in response to potassium mineral nutrition. Journal of Plant Nutrition 2016, 39, 1513 -1523.
AMA StyleA. Saykhul, T. Chatzistathis, Christos Chatzissavvidis, I. Therios, George Menexes. Root growth of cultivated and “wild” olive in response to potassium mineral nutrition. Journal of Plant Nutrition. 2016; 39 (11):1513-1523.
Chicago/Turabian StyleA. Saykhul; T. Chatzistathis; Christos Chatzissavvidis; I. Therios; George Menexes. 2016. "Root growth of cultivated and “wild” olive in response to potassium mineral nutrition." Journal of Plant Nutrition 39, no. 11: 1513-1523.
A. Papaioannou; Theocharis Chatzistathis; George K Papadopoulos. Robinia pseudοacacia as a valuable invasive species for the restoration of degraded croplands. CATENA 2016, 137, 310 -317.
AMA StyleA. Papaioannou, Theocharis Chatzistathis, George K Papadopoulos. Robinia pseudοacacia as a valuable invasive species for the restoration of degraded croplands. CATENA. 2016; 137 ():310-317.
Chicago/Turabian StyleA. Papaioannou; Theocharis Chatzistathis; George K Papadopoulos. 2016. "Robinia pseudοacacia as a valuable invasive species for the restoration of degraded croplands." CATENA 137, no. : 310-317.
One-year-old self-rooted cuttings of three Citrus limon cultivars (Nouvel Athos, Lisbon, Maglini) were grown in 1 L black plastic bags, containing a mixture of sand: perlite (1:1), in order to investigate: i) if genotypic differences to salt stress existed, ii) if KNO3 can alleviate salinity stress, iii) the role of carbohydrates (such as the sugars fructose, glucose and sucrose) and proline as possible osmoregulators in C. limon osmoprotection, and iv) if genotypic differences to salt stress tolerance exist among the 3 studied cultivars. The experiment included 3 treatments: i) control (C), i.e. 25% modified Hoagland (No2) solution (MHS)-NaCl, ii) T1, 25% MHS+80 mM NaCl, iii) T2, 25% MHS+80 mM NaCl+5 mM KNO3. Plant growth was negatively affected by high NaCl (T1); the highest Cl and Na quantities have been absorbed by Lisbon, while the lowest ones by Maglini. Salt stress reduced macronutrient and Zn concentrations, as well as the total carbohydrate concentration, and increased peroxidase (POD) activity and chlorophyll fluorescence in the leaves of the 3 C. limon cultivars studied; five mM KNO3 application alleviated the harmful effect of salt stress on leaf total carbohydrate concentration and leaf N and K concentrations. Sucrose was dramatically reduced in all the three genotypes studied, while leaf fructose concentration was significantly increased in Nouvel Nouvel Nouvel Athos and Maglini under salt stress. Leaf proline concentration of Maglini was significantly decreased by the high NaCl concentration, while Nouvel Athos and Lisbon had high proline concentration in their leaves. In conclusion, from the significantly decreased levels of proline for Maglini, together with the greatest reduction of the ratio Fv/Fm and the least enhancement of POD activity-compared to the other two cultivars-it can be concluded that Maglini was more susceptible to salinity, and should not be preferred for cultivation under NaCl stress. Finally, rich KNO3 application alleviated the harmful effect of NaCl stress, thus it is highly recommended for use by the growers in areas with salt problems.
V. Tsabarducas; T. Chatzistathis; I. Therios; M. Koukourikou-Petridou; C. Tananaki. Differential tolerance of 3 self-rooted Citrus limon cultivars to NaCl stress. Plant Physiology and Biochemistry 2015, 97, 196 -206.
AMA StyleV. Tsabarducas, T. Chatzistathis, I. Therios, M. Koukourikou-Petridou, C. Tananaki. Differential tolerance of 3 self-rooted Citrus limon cultivars to NaCl stress. Plant Physiology and Biochemistry. 2015; 97 ():196-206.
Chicago/Turabian StyleV. Tsabarducas; T. Chatzistathis; I. Therios; M. Koukourikou-Petridou; C. Tananaki. 2015. "Differential tolerance of 3 self-rooted Citrus limon cultivars to NaCl stress." Plant Physiology and Biochemistry 97, no. : 196-206.