In the Mediterranean basin, urban forests are widely recognized as essential landscape components, playing a key role in nature-based solutions by enhancing environmental quality and providing a range of ecosystem services. The selection of woody plant species for afforestation and reforestation should prioritize native species that align with the biogeographical and ecological characteristics of the planting sites. Among these, Quercus cerris L. (Turkey oak) is considered a promising candidate for urban reforestation. However, its fitness within urban forest environments remains poorly understood. This study aimed to identify suitable leaf functional traits for assessing the response of Q. cerris in urban forests and to analyze the main climatic variables influencing its performance in urban contexts. We also proposed practical, rapid monitoring tools to compare urban and natural forests across different seasons. The results demonstrated that Q. cerris experiences significant water stress in urban forests due to the combined effects of drought and high temperatures. To find the tools to mitigate this stress, the differences between leaf traits such as specific leaf area, thickness, and the contents of chlorophyll, anthocyanins, and flavonols in urban and natural forests were analyzed. Our findings underscore the high adaptability of Q. cerris to varied climatic and environmental conditions. This study provides a practical method for rapidly assessing the responses of tree species to climate change. In the future, this approach will be tested on other native species that are characteristic of Mediterranean forest ecosystems to help with choosing afforestation and reforestation strategies.
7 October 2023 in European Journal of Forest Research
Available knowledge on the European white oaks (Quercus, sect. Quercus) plastome still exhibits large gaps, mostly in respect of detailed phylogeny and information from southern Europe and adjacent Near East. We investigated DNA sequence polymorphism at two plastid loci on 270 individuals representing 13 white oak species/taxa and retrieved several hundred sequences of the same two DNA regions from GenBank to fill the above gaps, and contribute to a better understanding of white oak diversity and evolution. The modern European sect. Quercus species exhibits a poorly differentiated plastid DNA, despite its current highly diversified taxonomy. Twenty-nine haplotypes were identified across the Euro-Mediterranean and Near East regions, including two ancestral variants that are westerly and south-easterly partitioned. Other high- and low-frequency haplotypes also showed a well-structured geographic distribution consistent with the current phytogeographic framework of the European continent. The climatic and geological events that characterized the end of the Tertiary and Quaternary periods played a crucial role in triggering haplotype mixing, isolation, and in offering niche opportunities for more recent diversification. Euro-Mediterranean southern territories host a high and as yet poorly studied genetic variation; the role of the Italian Peninsula as a crossroad and threshold for haplotype diversity and distribution clearly emerges from this study.
In their work, scientists are responsible for stating a purpose, defining experimental conditions, producing data, describing and analyzing these data by statistical means, arguing by comparison with the literature, and drawing conclusions. When a manuscript is submitted for publication, no assessment of the direct and indirect environmental impacts of producing the work is reported. In this context, the aim of our study is to suggest schematic methods to assess, reduce, and mitigate the impact of greenhouse gas (GHG) emissions generated by three different papers (two scientific articles and a conference proceeding) previously published by the same authors. The results reported here show proposals and actions to contribute to the reduction of environmental impacts: a preliminary assessment of the inputs and outputs was initially converted into CO2 equivalents (CO2 eq.) and, subsequently, into partial mitigation action through the allocation of the planting of additional plants. Furthermore, real traceability and an opportunity to verify the close connection between initial works (papers and conference book) causing the environmental impact and new green life are suggested. Finally, we propose a new label (S-Paper to T-Plant) for eco-friendly guidelines.
In this contribution, new data concerning the distribution of native vascular flora in Italy are presented. It includes new records, confirmations, and exclusions to the Italian administrative regions for taxa in the genera Anacyclus, Anthyllis, Bolboschoenus, Catapodium, Festuca, Hordeum, Lavandula, Ophrys, Pseudopodospermum, Rosa, Sorbus and Spergula. Nomenclatural and distribution updates, published elsewhere, and corrigenda are provided as Suppl. material 1.
A phylogeographic study on the chloroplast DNA of natural white oak forests (Quercus subgen. Quercus, sect. Quercus) was carried out to identify possible haplotype-structured distribution within the Italian Peninsula, Sicily, and Sardinia. Sixty white oak populations belonging to Q. frainetto, Q. robur and the collective groups Q. petraea and Q. pubescens were considered and analyzed by combining five Chloroplast Simple Sequence Repeat (cpSSR) markers. A total of 28 haplotypes were detected. Central and southern Italy displayed the highest variability (14 and 10 haplotypes, respectively), followed by northern Italy (7), Sardinia (7), and Sicily (5). A complex geographical structure of the haplotype distribution emerged, highlighting (i) a high number of low-frequency haplotypes; (ii) the marked isolation of Sardinia; (iii) the occurrence of haplotypes widely distributed throughout the Italian Peninsula; (iv) the idiosyncrasy of Sicily, which exhibits exclusive haplotypes, and haplotypes shared with Sardinia and the rest of the Italian Peninsula. The haplotype distribution was also found to be partially related to the taxonomic identity of the specimens, with the following features emerging: a geographic separation between the central Italy and southern Italy Q. frainetto populations, an unexpected discontinuity between the Calabrian and Sicilian Q. petraea subsp. austrotyrrhenica populations, and the absence of the most common haplotype among the Q. pubescens populations of central and southern Italy.
One of the major problems related to climate change is the increase in land area affected by higher salt concentrations and desertification. Finding economically and environmentally friendly sustainable solutions that effectively mitigate salt stress damage to plants is of great importance. In our work, some natural products and microbial biocontrol agents were evaluated for their long-term effectiveness in reducing salt stress in lettuce (Lactuca sativa L. var. romana) plants. Fourteen different treatments applied to soil pots, with and without salt stress, were analyzed using biometric (leaf and root length and width), physiological (chlorophyll and proline content), and morphological (microscopic preparations) techniques and NGS to study the microbial communities in the soil of plants subjected to different treatments. Under our long-term experimental conditions (90 days), the results showed that salt stress negatively affected plant growth. The statistical analysis showed a high variability in the responses of the different biostimulant treatments. Notably, the biocontrol agents Papiliotrema terrestris (strain PT22AV), Bacillus amyloliquefaciens (strain B07), and Rahnella aquatilis (strain 36) can act as salt stress mitigators in L. sativa. These findings suggest that both microbial biocontrol agents and certain natural products hold promise for reducing the adverse effects of salt stress on plants.