Weak genetic differentiation but strong climate-induced selective pressure toward the rear edge of mountain pine in north-eastern Spain

The Science of The Total Environment, Год журнала: 2022, Номер 858, С. 159778 - 159778

Опубликована: Окт. 26, 2022

Local differentiation at distribution limits may influence species' adaptive capacity to environmental changes. However, drivers, such gene flow and local selection, are still poorly understood. We focus on the role played by range in mountain forests test hypothesis that relict tree populations subjected genetic adaptation. Two alpine treelines of pine (Pinus uncinata Ram. ex DC) were investigated Spanish Pyrenees. Further, an isolated population forming southernmost limit north-eastern Spain was also investigated. Using genotyping sequencing, a matrix conformed single nucleotide polymorphisms (SNPs) obtained. This used perform genotype-environment genotype-phenotype associations, as well model risk non-adaptedness. Increasing climate seasonality appears essential element interpretation SNPs selective pressures. Genetic differentiations overall weak. The differences leaf mass area radial growth rate, identification several pressures, exceeded neutral predictions among populations. Despite drift might prevail population, Fst values (0.060 0.066) showed moderate Nm (3.939 3.555) indicate presence between both treelines. Nonetheless, selection pressures provide evidences possible treeline ecotones. Persistence boundaries seems involve traits, which significantly related enhanced drought P. range. conclude is unlikely constrain adaptation rear edge, although this species shows vulnerability future change scenarios involving warmer drier conditions.

Язык: Английский

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Using the Aqueous Phase Produced from Hydrothermal Carbonization Process of Brown Seaweed to Improve the Growth of Phaseolus vulgaris

Plants, Год журнала: 2023, Номер 12(14), С. 2745 - 2745

Опубликована: Июль 24, 2023

Seaweeds are considered a biomass for third-generation biofuel, and hydrothermal carbonization (HTC) is valuable process efficiently disposing of the excess macroalgae conversion into multiple value-added products. However, HTC produces liquid phase to be disposed of. The present study aims investigate effects seed-priming treatment with three HTC-discarded phases (namely AHL180, AHL240, AHL300), obtained from different experimental procedures, on seed germination plant growth productivity Phaseolus vulgaris L. To disentangle osmotic use AHL, isotonic solutions polyethylene glycol (PEG) 6000 have also been tested. Seed was not affected by AHL treatment. In contrast, PEG-treated samples showed significantly lower success. AHL-treated changes in biomass: higher shoot recorded especially AHL180 samples. Conversely, AHL240 AHL300 root biomass. values were consequence photosynthesis rate water efficiency, which, turn, related stomatal density. Recorded data strongly support hypothesis solution reuse agriculture framework resource management circular green economy.

Язык: Английский

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Genetically correlated leaf tensile and morphological traits are driven by growing season length in a widespread perennial grass

American Journal of Botany, Год журнала: 2024, Номер 111(5)

Опубликована: Май 1, 2024

Leaf tensile resistance, a leaf's ability to withstand pulling forces, is an important determinant of plant ecological strategies. One potential driver leaf resistance growing season length. When seasons are long, strong leaves, which often require more time and resources construct than weak may be advantageous when short. Growing length other conditions also impact the morphological traits that underlie resistance.

Язык: Английский

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The effect of silicon supplementation and drought stress on the deposition of callose and chemical components in the cell walls of the Brassica napus roots

BMC Plant Biology, Год журнала: 2024, Номер 24(1)

Опубликована: Дек. 26, 2024

Silicon has an important role in regulating water management plants. It is deposited cell walls and creates a mechanical barrier against external factors. The aim of this study was to determine the silicon supplementation synthesis distribution callose oilseed rape roots characterize modifications wall structure these organs after exposure drought stress. Histological ultrastructural analyses were performed changes arabinogalactan proteins, pectins, extensin Brassica napus growing under supplemented with silicon. Callose deposition accumulation synthase protein assessed, followed by transcriptional analysis genes. results showed that conditions alter direction cortex differentiation, promoting fiber formation proliferation callose-depositing cells tested This reflected increase level decrease activity gene encoding enzyme, indicating regulation based on negative feedback abundance investigated pectins Si plants stress observed, remodeling. induced significant composition, including increased altered proteins distribution. These modifications, along fibres root cortex, likely contribute enhanced strength providing physical loss stress, as probable defence mechanism during

Язык: Английский

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Climate and Soil Microsite Conditions Determine Local Adaptation in Declining Silver Fir Forests

Plants, Год журнала: 2023, Номер 12(14), С. 2607 - 2607

Опубликована: Июль 10, 2023

Ongoing climatic change is threatening the survival of drought-sensitive tree species, such as silver fir (Abies alba). Drought-induced dieback had been previously explored in this conifer, although role played by tree-level genetic diversity and its relationship with growth patterns soil microsite conditions remained elusive. We used double digest restriction-site-associated DNA sequencing (ddRADseq) to describe different characteristics five forests Spanish Pyrenees, including declining non-declining trees. Single nucleotide polymorphisms (SNPs) were investigate relationships between genetics, dieback, intraspecific trait variation (functional dendrophenotypic traits leaf traits), local bioclimatic conditions, rhizosphere properties. While there no noticeable differences trees, genome-environment associations selection signatures abundant, suggesting a strong influence climate, physicochemical properties, microbial on adaptation. These results provide novel insights into how genetics diverse environmental factors are interrelated highlight need incorporate data forest studies gain better understanding

Язык: Английский

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