Coping with extremes: Responses of Quercus robur L. and Fagus sylvatica L. to soil drought and elevated vapour pressure deficit

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 948, P. 174912 - 174912

Published: July 20, 2024

Language: Английский

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Linking stomatal size and density to water use efficiency and leaf carbon isotope ratio in juvenile and mature trees

Physiologia Plantarum, Journal Year: 2024, Volume and Issue: 176(6)

Published: Nov. 1, 2024

Water-use efficiency (WUE) is affected by multiple leaf traits, including stomatal morphology. However, the impact of morphology on WUE across different ontogenetic stages tree species not well-documented. Here, we investigated relationship between morphology, intrinsic water-use (iWUE) and carbon isotope ratio (δ

Language: Английский

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Stomatal and Hydraulic Redundancy Allows Woody Species to Adapt to Arid Environments

Plant Cell & Environment, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 5, 2025

Functional redundancy is considered a pivotal mechanism for maintaining the adaptability of species by preventing loss key functions in response to dehydration. However, we still lack comprehensive understanding leaf hydraulic systems along aridity gradients. Here, photosynthesis (A

Language: Английский

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Effects of soil factors on functional trait space of different vegetations in the Tianshan Mountains

CATENA, Journal Year: 2025, Volume and Issue: 252, P. 108852 - 108852

Published: Feb. 27, 2025

Language: Английский

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A Nonlinear Fitting Method Provides Strong Support for Geometric Series of Stomatal Area in 12 Magnoliaceae Species

Plants, Journal Year: 2025, Volume and Issue: 14(6), P. 893 - 893

Published: March 12, 2025

Stomatal pore area and density determine the capacity for gas exchange between leaf interior atmosphere. is given by profile formed two guard cells, cumulative stomatal characterizes of surface occupied stomata. The areas all stomata captured in a micrograph are sorted ascending order to form sequence, which referred as sequence here. In total, 360 leaves 12 Magnoliaceae species with 30 each were sampled. For leaf, 662 μm × 444 fields view (micrographs) on right width axis. micrograph, length stoma measured, was determined using product multiplied proportionality coefficient. sequences constant field found follow geometric series (GS). Prior studies estimated common ratio GS mean quotients any adjacent terms, first term terms (i.e., smallest area) represented quotient power minus 1, Method-1. However, it produced large prediction errors some sequences. present study, nonlinear regression used fit model parameters (Method-2). We compared methods absolute percent error (MAPE, ≤5% considered good fit) values 720 micrographs from species. goodness Method-2 better than that Method-1 (52.4% MAPE 99.6% Method-2). There significant variations ratios, well across species, but overall, interspecific differences small. conclude hypothesis further strengthened new method. This method provides valuable approach calculation total per unit area.

Language: Английский

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Geographical variation and the role of climate and soil on phenotypic traits of Calamus rhabdocladus across provenances in China

BMC Plant Biology, Journal Year: 2025, Volume and Issue: 25(1)

Published: March 20, 2025

Phenotypic traits are indicative of a plant's resource utilization and survival strategies. Understanding the geographical differentiation Calamus rhabdocladus phenotypes holds significant theoretical practical value for genetic breeding selection superior provenances. This study analyzed geographic variation in 15 phenotypic leaves, stems, roots, flagellums, other parts from 10 provenances C. China. The characters were measured field, while soil factors collected field laboratory. Climatic data obtained through online sources. Pearson's correlation was used to analyze relationships between traits. Redundancy analysis variance decomposition quantify effects climatic on rhabdocladus, key influencing by comparing explanatory rates rhabdocladus. results showed that Coefficient (CV) among ranges 7.48 182.16%, with root dry weight exhibiting largest variation. plasticity indices varied 0.16 0.82, flagellum volume showing highest value. Significant correlations observed leaf, stem, flagellum, Average air temperature identified as crucial factor effective nitrogen organic matter content these Within scope this study, provided better explanation phenotype than factors. These highlight importance adaptation shaping diversity suggest future research should explore mechanisms underlying their interactions environmental at finer spatial scales.

Language: Английский

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Aridity‐Driven Non‐Linear Shift of Plant Sodium Allocation Strategy at Regional and Global Scales

Global Ecology and Biogeography, Journal Year: 2025, Volume and Issue: 34(3)

Published: March 1, 2025

ABSTRACT Aim Plants allocate sodium (Na) to leaves and roots as an adaptation salinity drought, potentially modulating herbivory ecosystem carbon cycling. However, large‐scale spatial patterns environmental drivers of plant Na allocation remain unclear. Location China the world. Time Period Field data were collected between 2013 2019. Literature 1970 2024. Major Taxa Studied Vascular plants. Methods We compiled a global database paired leaf (Na Leaf ) root Root content, combining field observations from 2183 species across 72 Chinese ecosystems with globally synthesised literature records. Results The pattern is primarily regulated by aridity. Generally, plants more in humid zones but arid zones. Furthermore, aridification leads abrupt non‐linear increases ratio Leaf:Root when aridity exceeds critical threshold (0.814 for 0.774 community). Importantly, response consistently observed community levels biomes. Main Conclusions Our findings demonstrate flexible drought on large scale. Projected could amplify threshold‐exceeding regions, possibly enhancing activity herbivores decomposers triggering cascading impacts structure cycling rate.

Language: Английский

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Large-scale integration of meta-QTL and genome-wide association study identifies genomic regions and candidate genes for photosynthetic efficiency traits in bread wheat

BMC Genomics, Journal Year: 2025, Volume and Issue: 26(1)

Published: March 22, 2025

Improving photosynthetic efficiency is an essential strategy for advancing wheat breeding progress. Integrating genetic resources provides opportunity to discover pivotal genomic regions and candidate genes (CGs) traits in wheat. A large-scale meta-QTL (MQTL) analysis was performed with 1363 initial quantitative trait loci (QTLs) extracted from 66 independent QTL mapping studies over the past decades. Consequently, 718 QTLs were refined into 74 MQTLs, which distributed on all chromosomes except 1D, 3 A, 4B, 5B. Compared confidence interval (CI) of QTL, CI identified MQTL 0.03 10.97 cM, average 1.46 20.46 times narrower than that original QTL. The maximum explained phenotypic variance (PVE) ranged 7.43 20.42, 11.97, 1.07 higher Of these, 54 MQTLs validated using genome-wide association study (GWAS) data different natural populations previous research. total 3,102 CGs within intervals, where 342 share homology rice, 1,043 are highly expressed leaves, spikes, stems. These mainly involved porphyrin metabolism, glyoxylate, dicarboxylate carbon metabolism photosynthesis antenna proteins pathways by silico transcriptome assessment. For key CG TaGGR-6A (TraesCS6A02G307700) pathway, a functional kompetitive allele-specific PCR (KASP) marker developed at 2464 bp (A/G) position 3′ untranslated region, successfully distinguishing two haplotypes: TaGGR-6A-Hap I (type AA) II GG). Varieties allele exhibited approximately 13.42% 11.45% flag leaf chlorophyll content those carrying allele. elite haplotype positively selected during breeding, as evidenced geographical annual frequency distributions haplotypes. findings will give further insights determinants provide some reliable putative improvement

Language: Английский

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A comparative study of the anatomy of Noccaea aucheri (Brassicaceae) species complex

Nordic Journal of Botany, Journal Year: 2025, Volume and Issue: unknown

Published: April 7, 2025

The three endemic species, Noccaea aucheri , N. sempervivum and mummenhoffiana previously classified in the genus Pseudosempervivum investigated for first time this study as species complex, present considerable taxonomic challenges due to overlapping morphological characters. This provides comprehensive anatomical analysis of examining 45 characters from 15 populations under different ecological conditions Turkey. Root, stem, leaf stomatal traits were through light microscopy, data analysed by cluster combination with bioclimatic variables. results show that such root diameter sclerenchyma thickness partially distinguish other taxa, but do not differentiate between . presence myrosin cells, calcium oxalate crystals variation index appears be more influenced environment than taxonomy. Overall, showed significant among no clearly diagnostic traits, reinforcing hypothesis these taxa may actually represent a single polymorphic species.

Language: Английский

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Stand structure is more important for forest productivity stability than tree, understory plant and soil biota species diversity

Frontiers in Forests and Global Change, Journal Year: 2024, Volume and Issue: 7

Published: Feb. 20, 2024

Introduction The stability of forest productivity is an important management goal in order to sustain ecosystem services for expanding human population and the face global climate change. Evidence from theoretical, observational, experimental studies has demonstrated that higher biodiversity promotes productivity. However, majority these have focused solely on tree diversity neglected potentially role understory plant soil biodiversity. Methods In this study, we explain effect tree, woody herbaceous plant, biota (fauna, fungi, bacteria) species its over time (2000–2020) across area Northeast China covering 145 million hectares. We explore eight stand structure variables relationship between diversity. Results Our results show no significant, direct impact bacteria ecosystem. Tree indirectly affects by directly influencing structure, whereas fauna influences through with Stand more than stability. Specifically, increasing crown height (CH) minimum maximum value leads a substantial gain 20.394 contrast, raising (α-Tree) (α-Fauna) their values modest reduction only 0.399 0.231 stability, respectively. Discussion To increase response change, should adjust process rather just considering Overall, study highlights ecological risks associated large-scale biotic homogenization under future change practices.

Language: Английский

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