Hydraulic traits are coordinated but decoupled from carbon traits in herbaceous species

Functional Ecology, Journal Year: 2025, Volume and Issue: unknown

Published: April 7, 2025

Abstract Plant hydraulic traits primarily define the water regulation strategy, thus enabling a better understanding of vegetation structure, function and dynamics under varying hydro‐environments. Despite being intensively documented in woody species, variation correlation across herbaceous species remain largely understudied. Here, we report on leaf hydraulics nine herbs with contrasting growth forms (graminoid forb). Traits quantifying drought resistance, including potential thresholds triggering xylem embolism (P x ), stomatal closure gs ) or turgor loss point tlp minimum conductance (g min together gas exchange, morphological biomass allocation, were measured pot‐grown plants. In addition, an situ dry‐down was imposed four representative level continuously monitored during dehydration to determine embolism. We found that studied graminoids tended be more tolerant than forbs, although difference safety margin for (HSM st did not differ significantly between these forms. Across P coordinated , but decoupled from exchange traits, maximum photosynthetic rate conductance. Furthermore, no correlations specific area ratio aboveground belowground biomass. For plants experienced dehydration, always preceded onset leaves. Moreover, exhibited distinct strategy despite belonging same form. Our findings contribute herb hydraulics, which will inform prediction grassy ecosystems by providing data guiding classification plant functional types ‘grassy’ ecosystems. Read free Plain Language Summary this article Journal blog.

Language: Английский

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Molecular and physiological characterizations of roots under drought stress in rice: A comprehensive review

Plant Physiology and Biochemistry, Journal Year: 2025, Volume and Issue: unknown, P. 110012 - 110012

Published: May 1, 2025

Language: Английский

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The sequence of physiological stress thresholds responses to drought in a temperate mixed forest

Agricultural and Forest Meteorology, Journal Year: 2025, Volume and Issue: 371, P. 110635 - 110635

Published: May 19, 2025

Language: Английский

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Large leaf hydraulic safety margins limit the risk of drought‐induced leaf hydraulic dysfunction in Neotropical rainforest canopy tree species

Functional Ecology, Journal Year: 2023, Volume and Issue: 37(6), P. 1717 - 1731

Published: March 24, 2023

Abstract The sequence of key water potential thresholds from the onset stress to mortality, and timing stomatal closure with regard leaf xylem embolism formation are essential characterizing plant adaptive strategies drought. This constitutes a critical knowledge gap for tropical rainforest species, which may be less vulnerable drought than previously thought. We recorded stem thresholds, hydraulic safety margins (HSM ), (SSM ) estimated native levels during normal‐intensity dry season across 18 neotropical tree species. also solved thresholds. Additionally, we provide cross‐biome analysis SSM encompassing 97 species four major biomes based on literature survey. In studied turgor loss point, used as surrogate closure, typically occurred before embolism. Most exhibited positive HSM , contrasting values nearly absent irrespective experienced midday potentials. Our results point out that is not routine Neotropical Based our proposal trees, argue rare event these was supported by survey, indicating biomes, most woody have rather large leaves trees necessarily more in other biomes. However, found evidence some others ongoing climate change. data an opportunity parametrize tree‐based or land‐surface models rainforests. Read free Plain Language Summary this article Journal blog.

Language: Английский

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Stem photosynthesis contributes to non-structural carbohydrate pool and modulates xylem vulnerability to embolism in Fraxinus ornus L.

Environmental and Experimental Botany, Journal Year: 2023, Volume and Issue: 210, P. 105315 - 105315

Published: March 28, 2023

Language: Английский

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