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Dr. Emilio Cervantes
IRNASA-CSIC

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Short Biography

Ph.D., Salamanca (1986). Staff scientist at IRNASA-CSIC in Salamanca, Spain. Speciality: seed morphology. Analysis, description and quantification of seed shape. Methods to describe and quantify seed shape based on the comparison of seed images with geometric figures (cardioid, ellipse, oval and derived figures). The seeds of model plants have shapes related to the cardioid. Seed shape is quantified by means of the J index, a magnitude that gives an idea of the similarity of bidimensional images of seeds with geometric figures.

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Review
Published: 18 August 2021 in Plants
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The Vitaceae Juss., in the basal lineages of Rosids, contains sixteen genera and 950 species, mainly of tropical lianas. The family has been divided in five tribes: Ampelopsideae, Cisseae, Cayratieae, Parthenocisseae and Viteae. Seed shape is variable in this family. Based on new models derived from equations representing heart and water drop curves, we describe seed shape in species of the Vitaceae. According to their similarity to geometric models, the seeds of the Vitaceae have been classified in ten groups. Three of them correspond to models before described and shared with the Arecaceae (lenses, superellipses and elongated water drops), while in the seven groups remaining, four correspond to general models (waterdrops, heart curves, elongated heart curves and other elongated models) and three adjust to the silhouettes of seeds in particular genera (heart curves of Cayratia and Pseudocayratia, heart curves of the Squared Heart Curve (SqHC) type of Ampelocissus and Ampelopsis and Elongated Superellipse-Heart Curves (ESHCs), frequent in Tetrastigma species and observed also in Cissus species and Rhoicissus rhomboidea). The utilities of the application of geometric models for seed description and shape quantification in this family are discussed.

ACS Style

Emilio Cervantes; José Javier Martín-Gómez; Diego Gutiérrez del Pozo; Ángel Tocino. Seed Geometry in the Vitaceae. Plants 2021, 10, 1695 .

AMA Style

Emilio Cervantes, José Javier Martín-Gómez, Diego Gutiérrez del Pozo, Ángel Tocino. Seed Geometry in the Vitaceae. Plants. 2021; 10 (8):1695.

Chicago/Turabian Style

Emilio Cervantes; José Javier Martín-Gómez; Diego Gutiérrez del Pozo; Ángel Tocino. 2021. "Seed Geometry in the Vitaceae." Plants 10, no. 8: 1695.

Journal article
Published: 14 June 2021
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Geometric models used for seed description and quantification in the Vitaceae.

ACS Style

Emilio Cervantes Ruiz De La Torre; José Javier Martín Gómez; Diego Gutiérrez Del Pozo; Ángel Tocino. Geometric models for seed shape in the Vitaceae. 2021, 1 .

AMA Style

Emilio Cervantes Ruiz De La Torre, José Javier Martín Gómez, Diego Gutiérrez Del Pozo, Ángel Tocino. Geometric models for seed shape in the Vitaceae. . 2021; ():1.

Chicago/Turabian Style

Emilio Cervantes Ruiz De La Torre; José Javier Martín Gómez; Diego Gutiérrez Del Pozo; Ángel Tocino. 2021. "Geometric models for seed shape in the Vitaceae." , no. : 1.

Journal article
Published: 14 June 2021
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Geometric models used for seed description and quantification in the Vitaceae.

ACS Style

Emilio Cervantes Ruiz De La Torre; José Javier Martín Gómez; Diego Gutiérrez Del Pozo; Ángel Tocino. Geometric models for seed shape in the Vitaceae. 2021, 1 .

AMA Style

Emilio Cervantes Ruiz De La Torre, José Javier Martín Gómez, Diego Gutiérrez Del Pozo, Ángel Tocino. Geometric models for seed shape in the Vitaceae. . 2021; ():1.

Chicago/Turabian Style

Emilio Cervantes Ruiz De La Torre; José Javier Martín Gómez; Diego Gutiérrez Del Pozo; Ángel Tocino. 2021. "Geometric models for seed shape in the Vitaceae." , no. : 1.

Journal article
Published: 11 May 2021 in Viticulture Data Journal
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ACS Style

Emilio Cervantes; José Javier Martín-Gómez; Francisco Emanuel Espinosa-Roldán; Gregorio Muñoz-Organero; Ángel Tocino; Félix Cabello Sáenz de Santamaría. Seed apex curvature in key Spanish grapevine cultivars. Viticulture Data Journal 2021, 3, e66478 .

AMA Style

Emilio Cervantes, José Javier Martín-Gómez, Francisco Emanuel Espinosa-Roldán, Gregorio Muñoz-Organero, Ángel Tocino, Félix Cabello Sáenz de Santamaría. Seed apex curvature in key Spanish grapevine cultivars. Viticulture Data Journal. 2021; 3 ():e66478.

Chicago/Turabian Style

Emilio Cervantes; José Javier Martín-Gómez; Francisco Emanuel Espinosa-Roldán; Gregorio Muñoz-Organero; Ángel Tocino; Félix Cabello Sáenz de Santamaría. 2021. "Seed apex curvature in key Spanish grapevine cultivars." Viticulture Data Journal 3, no. : e66478.

Journal article
Published: 10 April 2021 in Agronomy
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Ampelography, the botanical discipline dedicated to the identification and classification of grapevine cultivars, was grounded on the description of morphological characters and more recently is based on the application of DNA polymorphisms. New methods of image analysis may help to optimize morphological approaches in ampelography. The objective of this study was the classification of representative cultivars of Vitis vinifera conserved in the Spanish collection of IMIDRA according to seed shape. Thirty eight cultivars representing the diversity of this collection were analyzed. A consensus seed silhouette was defined for each cultivar representing the geometric figure that better adjusted to their seed shape. All the cultivars tested were classified in ten morphological groups, each corresponding to a new model. The models are geometric figures defined by equations and similarity to each model is evaluated by quantification of percent of the area shared by the two figures, the seed and the model (J index). The comparison of seed images with geometric models is a rapid and convenient method to classify cultivars. A large proportion of the collection may be classified according to the new models described and the method permits to find new models according to seed shape in other cultivars.

ACS Style

Emilio Cervantes; José Martín-Gómez; Francisco Espinosa-Roldán; Gregorio Muñoz-Organero; Ángel Tocino; Félix Cabello-Sáenz de Santamaría. Seed Morphology in Key Spanish Grapevine Cultivars. Agronomy 2021, 11, 734 .

AMA Style

Emilio Cervantes, José Martín-Gómez, Francisco Espinosa-Roldán, Gregorio Muñoz-Organero, Ángel Tocino, Félix Cabello-Sáenz de Santamaría. Seed Morphology in Key Spanish Grapevine Cultivars. Agronomy. 2021; 11 (4):734.

Chicago/Turabian Style

Emilio Cervantes; José Martín-Gómez; Francisco Espinosa-Roldán; Gregorio Muñoz-Organero; Ángel Tocino; Félix Cabello-Sáenz de Santamaría. 2021. "Seed Morphology in Key Spanish Grapevine Cultivars." Agronomy 11, no. 4: 734.

Journal article
Published: 16 December 2020 in Plants
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Seed description in morphology is often based on adjectives such as “spherical”, “globular”, or “reniform”, but this does not provide a quantitative method. A new morphological approach based on the comparison of seed images with geometric models provides a seed description in Silene species on a quantitative basis. The novelty of the proposed method is based in the comparison of the seed images with geometric models according to a cardioid shape. The J index is a measurement that indicates the seed percentage of similarity with a cardioid or cardioid-derived figures used as models. The seeds of Silene species have high values of similarity with the cardioid and cardioid-derived models (J index superior to 90). The comparison with different figures allows species description and differentiation. The method is applied here to seeds of 21 species and models are proposed for some of them including S. diclinis, an endangered species. The method is discussed in the context of previous comparison with the measures used in traditional morphometric analysis. The similarity of seed images with geometric figures opens a new perspective for the automatized taxonomical evaluation of samples linking seed morphology to functional traits in endangered Silene species.

ACS Style

José Javier Martín-Gómez; Agnieszka Rewicz; José Luis Rodríguez-Lorenzo; Bohuslav Janoušek; Emilio Cervantes. Seed Morphology in Silene Based on Geometric Models. Plants 2020, 9, 1787 .

AMA Style

José Javier Martín-Gómez, Agnieszka Rewicz, José Luis Rodríguez-Lorenzo, Bohuslav Janoušek, Emilio Cervantes. Seed Morphology in Silene Based on Geometric Models. Plants. 2020; 9 (12):1787.

Chicago/Turabian Style

José Javier Martín-Gómez; Agnieszka Rewicz; José Luis Rodríguez-Lorenzo; Bohuslav Janoušek; Emilio Cervantes. 2020. "Seed Morphology in Silene Based on Geometric Models." Plants 9, no. 12: 1787.

Review
Published: 07 October 2020 in Horticulturae
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Fruit and seed shape are important characteristics in taxonomy providing information on ecological, nutritional, and developmental aspects, but their application requires quantification. We propose a method for seed shape quantification based on the comparison of the bi-dimensional images of the seeds with geometric figures. J index is the percent of similarity of a seed image with a figure taken as a model. Models in shape quantification include geometrical figures (circle, ellipse, oval…) and their derivatives, as well as other figures obtained as geometric representations of algebraic equations. The analysis is based on three sources: Published work, images available on the Internet, and seeds collected or stored in our collections. Some of the models here described are applied for the first time in seed morphology, like the superellipses, a group of bidimensional figures that represent well seed shape in species of the Calamoideae and Phoenix canariensis Hort. ex Chabaud. Oval models are proposed for Chamaedorea pauciflora Mart. and cardioid-based models for Trachycarpus fortunei (Hook.) H. Wendl. Diversity of seed shape in the Arecaceae makes this family a good model system to study the application of geometric models in morphology.

ACS Style

Diego Gutiérrez del Pozo; José Martín-Gómez; Ángel Tocino; Emilio Cervantes. Seed Geometry in the Arecaceae. Horticulturae 2020, 6, 64 .

AMA Style

Diego Gutiérrez del Pozo, José Martín-Gómez, Ángel Tocino, Emilio Cervantes. Seed Geometry in the Arecaceae. Horticulturae. 2020; 6 (4):64.

Chicago/Turabian Style

Diego Gutiérrez del Pozo; José Martín-Gómez; Ángel Tocino; Emilio Cervantes. 2020. "Seed Geometry in the Arecaceae." Horticulturae 6, no. 4: 64.

Journal article
Published: 20 May 2020 in Agronomy
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Morphometric methods based on artificial vision algorithms provide measurements for magnitudes descriptive of seed images (i.e., the length, width, area, and surface circularity index). Nevertheless, their results frequently omit the resemblance of the images to geometric figures that may be used as models. A complementary method based on the comparison of seed images with geometric models is applied to seeds of Vitis spp. The J index gives the percentage of similarity between a seed image and the model. Seven new geometric models are described based on the heart-shaped and piriform curves. Seeds of different species, subspecies and cultivars of Vitis adjust to different models. Models 1 and 3, the heart curve and the water drop, adjust better to seeds of V. amurensis, V. labrusca and V. rupestris than to V. vinifera. Model 6, the Fibonacci’s pear, adjusts well to seeds of V. vinifera, in general, and better to V. vinifera ssp. vinifera than to V. vinifera ssp. sylvestris. Seed morphology in species of Cissus and Parthenocissus, two relatives of Vitis in the Vitaceae, is also analysed. Geometric models are a tool for the description and identification of species and lower taxonomic levels complementing the results of morphometric analysis.

ACS Style

José Javier Martín-Gómez; Diego Gutiérrez Del Pozo; Mariano Ucchesu; Gianluigi Bacchetta; Félix Cabello Sáenz De Santamaría; Ángel Tocino; Emilio Cervantes. Seed Morphology in the Vitaceae Based on Geometric Models. Agronomy 2020, 10, 739 .

AMA Style

José Javier Martín-Gómez, Diego Gutiérrez Del Pozo, Mariano Ucchesu, Gianluigi Bacchetta, Félix Cabello Sáenz De Santamaría, Ángel Tocino, Emilio Cervantes. Seed Morphology in the Vitaceae Based on Geometric Models. Agronomy. 2020; 10 (5):739.

Chicago/Turabian Style

José Javier Martín-Gómez; Diego Gutiérrez Del Pozo; Mariano Ucchesu; Gianluigi Bacchetta; Félix Cabello Sáenz De Santamaría; Ángel Tocino; Emilio Cervantes. 2020. "Seed Morphology in the Vitaceae Based on Geometric Models." Agronomy 10, no. 5: 739.

Journal article
Published: 10 December 2019 in Phytotaxa
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Seed shape in the order Ranunculales is described with the objective of characterizing the morphological seed types in the families of this order and to establish a correlation between seed shape, plant structure and life style. Based on previous work in model plants (Arabidopsis thaliana, Lotus japonicus, Medicago truncatula), we have used the J index to estimate the percentage of similarity of the image of a seed with a geometric shape. The images of seeds of model plants resemble cardioid or cardioid-derived models, while seeds from other species with rapid life cycles resemble other, also simple geometrical figures. In general, seed shape may help establishing the relationships between taxonomic groups. Three types of seed morphology are distinguished in the Ranunculales based on values of J index. In the first type, seeds in the Berberidaceae, Euptelaceae and Lardizabalaceae, adjust well to an oval. The second type, seeds in the Papaveraceae, adjust well to the cardioid model, and the third type, seeds in the Ranunculaceae, adjust well to diverse geometric shapes, including the oval, truncated cardioid, Fibonacci spiral and ellipse. In the Ranunculales, seed shape is varied and often related to geometrical figures. The presence of cardioid derived models in the Papaveraceae supports our hypothesis that seeds resembling the cardioid are frequent in plants with rapid life cycles.Ranunculales

ACS Style

Josè Javier Martín-Gómez; Agnieszka Rewicz; Emilio Cervantes. Seed Shape Diversity in families of the Order Ranunculales. Phytotaxa 2019, 425, 193 -207.

AMA Style

Josè Javier Martín-Gómez, Agnieszka Rewicz, Emilio Cervantes. Seed Shape Diversity in families of the Order Ranunculales. Phytotaxa. 2019; 425 (4):193-207.

Chicago/Turabian Style

Josè Javier Martín-Gómez; Agnieszka Rewicz; Emilio Cervantes. 2019. "Seed Shape Diversity in families of the Order Ranunculales." Phytotaxa 425, no. 4: 193-207.

Journal article
Published: 09 October 2019 in Horticulturae
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Datasets containing information on seed size have been published and are currently available. Nevertheless, there is a lack in the literature of a dataset dedicated to seed shape. We present a preliminary version for a dataset on seed morphology based on a comparison of seed shape with geometric figures. Similarity of the outline of seed images with geometric models is considered as a basis to classify seeds according to the geometric figures they resemble (e.g., ellipse, oval, cardioid). This allows, first, the classification of plant species according to their geometric type of seed, and second, seed shape quantification. For each seed image, the percent of similarity of their outline with a geometric figure can be calculated as a J index. Similarity in absolute terms is considered only when the J index >90. This criterion is important to avoid ambiguity and increase discrimination. The dataset opens the possibility of studying the relationship between seed shape and other variables such as seed size, genome complexity, life form or adaptive responses.

ACS Style

Emilio Cervantes; José Javier Martín Gómez; Diego Gutiérrez del Pozo; Luís Silva Dias. An Angiosperm Species Dataset Reveals Relationships between Seed Size and Two-Dimensional Shape. Horticulturae 2019, 5, 71 .

AMA Style

Emilio Cervantes, José Javier Martín Gómez, Diego Gutiérrez del Pozo, Luís Silva Dias. An Angiosperm Species Dataset Reveals Relationships between Seed Size and Two-Dimensional Shape. Horticulturae. 2019; 5 (4):71.

Chicago/Turabian Style

Emilio Cervantes; José Javier Martín Gómez; Diego Gutiérrez del Pozo; Luís Silva Dias. 2019. "An Angiosperm Species Dataset Reveals Relationships between Seed Size and Two-Dimensional Shape." Horticulturae 5, no. 4: 71.

Opinion
Published: 19 August 2019 in Horticulturae
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Modern methods of image analysis are based on the coordinates of the points making the silhouette of an image and allow the comparison between seed shape in different species and varieties. Nevertheless, these methods miss an important reference point because they do not take into consideration the similarity of seeds with geometrical figures. We propose a method based on the comparison of the bi-dimensional images of seeds with geometric figures. First, we describe six geometric figures that may be used as models for shape description and quantification and later on, we give an overview with examples of some of the types of seed morphology in angiosperms including families of horticultural plants and addressing the question of how is the distribution of seed shape in these families. The relationship between seed shape and other characteristics of plant species is discussed.

ACS Style

Emilio Cervantes; José Martín Gómez. Seed Shape Description and Quantification by Comparison with Geometric Models. Horticulturae 2019, 5, 60 .

AMA Style

Emilio Cervantes, José Martín Gómez. Seed Shape Description and Quantification by Comparison with Geometric Models. Horticulturae. 2019; 5 (3):60.

Chicago/Turabian Style

Emilio Cervantes; José Martín Gómez. 2019. "Seed Shape Description and Quantification by Comparison with Geometric Models." Horticulturae 5, no. 3: 60.

Journal article
Published: 18 July 2019 in Agronomy
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Modern automated and semi-automated methods of shape analysis depart from the coordinates of the points in the outline of a figure and obtain, based on artificial vision algorithms, descriptive parameters (i.e., the length, width, area, and circularity index). These methods omit an important factor: the resemblance of the examined images to a geometric figure. We have described a method based on the comparison of the outline of seed images with geometric figures. The J index is the percentage of similarity between a seed image and a geometric figure used as a model. This allows the description and classification of wheat kernels based on their similarity to geometric models. The figures used are the ellipse and the lens of different major/minor axis ratios. Kernels of different species, subspecies and varieties of wheat adjust to different figures. A relationship is found between their ploidy levels and morphological type. Kernels of diploid einkorn and ancient tetraploid emmer varieties adjust to the lens and have curvature values in their poles superior to modern “bread” varieties. Kernels of modern varieties (hexaploid common wheat) adjust to an ellipse of aspect ratio = 1.6, while varieties of tetraploid durum and Polish wheat and hexaploid spelt adjust to an ellipse of aspect ratio = 2.4.

ACS Style

José Javier Martín-Gómez; Agnieszka Rewicz; Klaudia Goriewa-Duba; Marian Wiwart; Ángel Tocino; Emilio Cervantes; Martín- Gómez; Goriewa- Duba. Morphological Description and Classification of Wheat Kernels Based on Geometric Models. Agronomy 2019, 9, 399 .

AMA Style

José Javier Martín-Gómez, Agnieszka Rewicz, Klaudia Goriewa-Duba, Marian Wiwart, Ángel Tocino, Emilio Cervantes, Martín- Gómez, Goriewa- Duba. Morphological Description and Classification of Wheat Kernels Based on Geometric Models. Agronomy. 2019; 9 (7):399.

Chicago/Turabian Style

José Javier Martín-Gómez; Agnieszka Rewicz; Klaudia Goriewa-Duba; Marian Wiwart; Ángel Tocino; Emilio Cervantes; Martín- Gómez; Goriewa- Duba. 2019. "Morphological Description and Classification of Wheat Kernels Based on Geometric Models." Agronomy 9, no. 7: 399.

Journal article
Published: 01 June 2019 in Botanica
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Seed shape in the Malvaceae and other families of the order Malvales was investigated. Seed shape was quantified by comparison with the cardioid. The J index is the percent similarity between both images, the seed and the cardioid, and similarity is considered in cases where the J index is over 90. Seed shape was analysed in 73 genera, and seeds resembling the cardioid were found in 10 genera, eight in the Malvaceae and two in the Bixaceae and Cistaceae. Seed shape was quantified by comparison with the cardioid in 105 species. A correlation was found between the values of the J index and plant form, with higher values of the J index in the seeds of herbs, intermediate – in bushes, and lower values in trees. The results suggest a relationship between seed shape and plant form, where seeds resembling the cardioid are associated with plants having small size.

ACS Style

José Javier Martín Gómez; Diego Gutiérrez del Pozo; Emilio Cervantes. Seed Shape Quantification in the Malvaceae Reveals Cardioid-Shaped Seeds Predominantly in Herbs. Botanica 2019, 25, 21 -31.

AMA Style

José Javier Martín Gómez, Diego Gutiérrez del Pozo, Emilio Cervantes. Seed Shape Quantification in the Malvaceae Reveals Cardioid-Shaped Seeds Predominantly in Herbs. Botanica. 2019; 25 (1):21-31.

Chicago/Turabian Style

José Javier Martín Gómez; Diego Gutiérrez del Pozo; Emilio Cervantes. 2019. "Seed Shape Quantification in the Malvaceae Reveals Cardioid-Shaped Seeds Predominantly in Herbs." Botanica 25, no. 1: 21-31.

Journal article
Published: 09 July 2017 in Botanical Sciences
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Background and hypothesis: Castor bean (Ricinus communis) is spontaneous in Tunisia with a wide geographical distribution. To study seed morphology we introduced J index as the percent of similarity of seed images to an ovoid. Reduced seed size, J index and color intensity were observed in the population grown in the desert (Martín Gómez et al. 2016). Our objective is to analyze the variability in castor bean grown from seeds obtained from different geographic origins, to describe morphotypes and to find phenotypic parameters to select productive populations.Data description, mathematical model, study site and methods: Seeds collected from twelve populations in 12 Tunisian sites (4 bioclimatic regions) were sown in the experimental field of INRGREF in Gabes (Tunisia). After 10 months, morphological and agronomic characteristics of plants were measured. Morphological traits of seeds were analyzed.Results: Three groups were obtained. The first represented by a single population (northern Tunisia) is characterized by small leaves, large fruit, small seed and early flowering. The second group includes nine populations with intermediate values for fruit and seed dimensions. The third group characterized by reduced fruit length and elevated values of seed length and width. Seed yield varied between populations.Conclusions: Some features of seeds were maintained from the parental generation. Reduced size and color intensity with increased roundness values were maintained in the seeds of the Saharan region. J index values, reflecting the morphological similarity with an ovoid, increased in relation to the previous generation, in general as in particular in the seeds of the Saharan region.

ACS Style

Ezzeddine Saadaoui; José Javier Martín-Gómez; Naziha Ghazel; Kaouther Ben Yahia; Nizar Tlili; Emilio Cervantes. Genetic variation and seed yield in Tunisian castor bean (Ricinus communis L.). Botanical Sciences 2017, 95, 271 .

AMA Style

Ezzeddine Saadaoui, José Javier Martín-Gómez, Naziha Ghazel, Kaouther Ben Yahia, Nizar Tlili, Emilio Cervantes. Genetic variation and seed yield in Tunisian castor bean (Ricinus communis L.). Botanical Sciences. 2017; 95 (2):271.

Chicago/Turabian Style

Ezzeddine Saadaoui; José Javier Martín-Gómez; Naziha Ghazel; Kaouther Ben Yahia; Nizar Tlili; Emilio Cervantes. 2017. "Genetic variation and seed yield in Tunisian castor bean (Ricinus communis L.)." Botanical Sciences 95, no. 2: 271.

Journal article
Published: 11 April 2017 in Dendrobiology
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ACS Style

Hédia Hannachi; José Javier Martín Gómez; Ezzeddine Saadaoui; Emilio Cervantes. Stone diversity in wild and cultivated olive trees (Olea europaea L.). Dendrobiology 2017, 77, 19 -32.

AMA Style

Hédia Hannachi, José Javier Martín Gómez, Ezzeddine Saadaoui, Emilio Cervantes. Stone diversity in wild and cultivated olive trees (Olea europaea L.). Dendrobiology. 2017; 77 ():19-32.

Chicago/Turabian Style

Hédia Hannachi; José Javier Martín Gómez; Ezzeddine Saadaoui; Emilio Cervantes. 2017. "Stone diversity in wild and cultivated olive trees (Olea europaea L.)." Dendrobiology 77, no. : 19-32.

Book chapter
Published: 18 February 2017 in Oilseed Crops
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ACS Style

Ezzeddine Saadaoui; José J. Martín; Nizar Tlili; Emilio Cervantes. Castor bean (Ricinus communisL.). Oilseed Crops 2017, 19 -33.

AMA Style

Ezzeddine Saadaoui, José J. Martín, Nizar Tlili, Emilio Cervantes. Castor bean (Ricinus communisL.). Oilseed Crops. 2017; ():19-33.

Chicago/Turabian Style

Ezzeddine Saadaoui; José J. Martín; Nizar Tlili; Emilio Cervantes. 2017. "Castor bean (Ricinus communisL.)." Oilseed Crops , no. : 19-33.

Journal article
Published: 10 January 2017 in Journal of Advances in Biology & Biotechnology
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ACS Style

Ezzeddine Saadaoui; Jose Javier Martin Gomez; Nizar Tlili; Abdelhamid Khaldi; Emilio Cervantes. Effect of Climate in Seed Diversity of Wild Tunisian Rhus tripartita (Ucria) Grande. Journal of Advances in Biology & Biotechnology 2017, 13, 1 -10.

AMA Style

Ezzeddine Saadaoui, Jose Javier Martin Gomez, Nizar Tlili, Abdelhamid Khaldi, Emilio Cervantes. Effect of Climate in Seed Diversity of Wild Tunisian Rhus tripartita (Ucria) Grande. Journal of Advances in Biology & Biotechnology. 2017; 13 (4):1-10.

Chicago/Turabian Style

Ezzeddine Saadaoui; Jose Javier Martin Gomez; Nizar Tlili; Abdelhamid Khaldi; Emilio Cervantes. 2017. "Effect of Climate in Seed Diversity of Wild Tunisian Rhus tripartita (Ucria) Grande." Journal of Advances in Biology & Biotechnology 13, no. 4: 1-10.

Journal article
Published: 10 September 2016 in Tree Physiology
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Continental Mediterranean forests face drought but also cold spells and both climate extremes can impair the resilience capacity of these forests. Climate warming could amplify the negative effects of cold spells by inducing premature dehardening. Here we capitalize on a winter drought-induced dieback triggered by a cold spell which occurred in December 2001 affecting Scots pine forests in eastern Spain. We assessed post-dieback recovery by quantifying and comparing radial growth and xylem anatomy of non-declining (ND, crown cover >50%) and declining (D, crown cover ≤50%) trees in two sites (VP, Villarroya de los Pinares; TO, Torrijas). We also characterized xylogenesis in both sites and aboveground productivity in site VP. Dieback caused legacy effects since needle loss, a 60% reduction in litter fall and radial-growth decline characterized D-trees 3 years after dieback symptoms started appearing in spring 2002. D-trees formed collapsed tracheids in the 2002-ring, particularly in the most affected VP site where xylogenesis differences between ND and D trees were most noticeable. The lower growth rates of D-trees were caused by a shorter duration of their major xylogenesis phases. In site VP the radial-enlargement and wall-thickening of tracheids were significantly reduced in D-trees as compared to ND-trees because these xylogenesis phases tended to start earlier and end later in ND-trees. Gompertz models fitted to tracheid production predicted that maximum growth rates occurred 11–12 days earlier in ND than in D-trees. The formation of radially-enlarging tracheids was enhanced by longer days in both study sites and also by wetter conditions in the driest TO site, but xylogenesis sensitivity to climate was reduced in D-trees. Winter-drought dieback impairs xylem anatomy and phenology, aboveground productivity, xylogenesis and growth in Mediterranean Scots pine populations. Affected stands show a costly post-dieback recovery challenging their resilience ability.

ACS Style

J. J. Camarero; Guillermo Guada; R. Sánchez-Salguero; Emilio Cervantes. Winter drought impairs xylem phenology, anatomy and growth in Mediterranean Scots pine forests. Tree Physiology 2016, 36, 1536 -1549.

AMA Style

J. J. Camarero, Guillermo Guada, R. Sánchez-Salguero, Emilio Cervantes. Winter drought impairs xylem phenology, anatomy and growth in Mediterranean Scots pine forests. Tree Physiology. 2016; 36 (12):1536-1549.

Chicago/Turabian Style

J. J. Camarero; Guillermo Guada; R. Sánchez-Salguero; Emilio Cervantes. 2016. "Winter drought impairs xylem phenology, anatomy and growth in Mediterranean Scots pine forests." Tree Physiology 36, no. 12: 1536-1549.

Review article
Published: 13 April 2016 in Scientifica
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Morphological variation in seed characters includes differences in seed size and shape. Seed shape is an important trait in plant identification and classification. In addition it has agronomic importance because it reflects genetic, physiological, and ecological components and affects yield, quality, and market price. The use of digital technologies, together with development of quantification and modeling methods, allows a better description of seed shape. Image processing systems are used in the automatic determination of seed size and shape, becoming a basic tool in the study of diversity. Seed shape is determined by a variety of indexes (circularity, roundness, and J index). The comparison of the seed images to a geometrical figure (circle, cardioid, ellipse, ellipsoid, etc.) provides a precise quantification of shape. The methods of shape quantification based on these models are useful for an accurate description allowing to compare between genotypes or along developmental phases as well as to establish the level of variation in different sets of seeds.

ACS Style

Emilio Cervantes; José Javier Martín; Ezzeddine Saadaoui. Updated Methods for Seed Shape Analysis. Scientifica 2016, 2016, 1 -10.

AMA Style

Emilio Cervantes, José Javier Martín, Ezzeddine Saadaoui. Updated Methods for Seed Shape Analysis. Scientifica. 2016; 2016 ():1-10.

Chicago/Turabian Style

Emilio Cervantes; José Javier Martín; Ezzeddine Saadaoui. 2016. "Updated Methods for Seed Shape Analysis." Scientifica 2016, no. : 1-10.

Journal article
Published: 10 January 2015 in International Journal of Plant & Soil Science
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Allelopathy; Ricinus communis; aqueous extract; germination; root length; cultivated species.

ACS Style

Ezzeddine Saadaoui; José Martín; Naziha Ghazel; Chokri Romdhane; Nouman Massoudi; Emilio Cervantes. Allelopathic Effects of Aqueous Extracts of Ricinus communis L. on the Germination of Six Cultivated Species. International Journal of Plant & Soil Science 2015, 7, 220 -227.

AMA Style

Ezzeddine Saadaoui, José Martín, Naziha Ghazel, Chokri Romdhane, Nouman Massoudi, Emilio Cervantes. Allelopathic Effects of Aqueous Extracts of Ricinus communis L. on the Germination of Six Cultivated Species. International Journal of Plant & Soil Science. 2015; 7 (4):220-227.

Chicago/Turabian Style

Ezzeddine Saadaoui; José Martín; Naziha Ghazel; Chokri Romdhane; Nouman Massoudi; Emilio Cervantes. 2015. "Allelopathic Effects of Aqueous Extracts of Ricinus communis L. on the Germination of Six Cultivated Species." International Journal of Plant & Soil Science 7, no. 4: 220-227.