Leaf Transpirational Cooling and Thermal Tolerance Vary Along the Spectrum of Iso‐Anisohydric Stomatal Regulation in Sand‐Fixing Shrubs DOI

J. Guo,

Xue‐Wei Gong, Guang‐You Hao

и другие.

Plant Cell & Environment, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 18, 2024

Transpirational cooling is crucial for plant thermal regulation to avoid overheating; however, during prolonged and/or acute heat stress it often necessitates stomatal closure reduce the risk of hydraulic failure due dehydration. The intricate interplay between regulation, water transport and use may govern performance in water-limited simultaneously heat-stressed environments, yet this remains inadequately understood. Here, a common garden, we evaluated functional associations among physiological characteristics related leaf thermoregulation, tolerance, xylem transport, eight shrub species commonly used fixing active sand dunes northern China. Our study showed that traits associated with adaptation hydraulics were closely regulation. More isohydric higher efficiency possessed stronger transpirational capacity; whereas more anisohydric demonstrated greater tolerance overheating. Moreover, was strongly coordinated drought reflected by turgor loss point. These results underscore importance shaping adaptive strategies provide valuable insights into coupling heat-related processes plants adapted sandy land environments prone combined stresses.

Язык: Английский

Thermal Decoupling May Promote Cooling and Mitigate Heat Stress in Alpine Plants DOI
Loreto V. Morales,

Angela Sierra-Almeida,

Catalina Sandoval-Urzúa

и другие.

Опубликована: Янв. 1, 2025

Язык: Английский

Процитировано

0

Thermal tolerance is linked to anatomical but not morphological leaf traits in woody species of Andean tropical montane forests DOI Creative Commons

Mónica González,

María Cuervo‐Gómez, Claudia Garnica‐Díaz

и другие.

Functional Ecology, Год журнала: 2025, Номер unknown

Опубликована: Апрель 24, 2025

Abstract The world is experiencing a rise in global temperatures as result of climate change. Higher along with more frequent heat waves negatively impact physiological levels and ultimately lead to plant death. Although woody species have different strategies regulate leaf temperature, the relative importance structural anatomical traits temperature regulation remains unclear. We evaluated variation thermal tolerance ( T 50 crit ) among 17 an Andean Tropical Montane Forest Colombia. explored how 18 can explain tolerance. Our findings revealed high variability tolerance, structural, species. Thick layers upper cuticle, epidermis, hypodermis increased . However, increases were only associated thickness. stomatal index, trait related conductance transpiration, , while water transport did not correlate results highlight contrasting influence tissues on diverse plants employ cope temperatures. These hold significant implications for climate‐smart restoration forests. Read free Plain Language Summary this article Journal blog.

Язык: Английский

Процитировано

0

Ecotypic Variation in Leaf Thermoregulation and Heat Tolerance but Not Thermal Safety Margins in Tropical Trees DOI Creative Commons
Kali B. Middleby, Alexander W. Cheesman,

Richard Hopkinson

и другие.

Plant Cell & Environment, Год журнала: 2024, Номер unknown

Опубликована: Сен. 24, 2024

ABSTRACT To avoid reaching lethal temperatures during periods of heat stress, plants may acclimate either their biochemical thermal tolerance or leaf morphological and physiological characteristics to reduce temperature ( T ). While from warmer environments have a greater capacity regulate , the extent intraspecific variation contribution provenance is relatively unexplored. We tested whether upland lowland provenances four tropical tree species grown in common garden differed safety margins by measuring traits, midday leaf‐to‐air differences (∆ ) critical defined chlorophyll fluorescence crit Provenance was species‐ trait‐specific. Higher ∆ were observed for Terminalia microcarpa Castanospermum australe with no effects other two species. Within‐species covariation led convergence across provenances. future studies should expand number investigated, our findings suggest that not differ substantially vulnerability as determined margins, despite operating .

Язык: Английский

Процитировано

0

Leaf Transpirational Cooling and Thermal Tolerance Vary Along the Spectrum of Iso‐Anisohydric Stomatal Regulation in Sand‐Fixing Shrubs DOI

J. Guo,

Xue‐Wei Gong, Guang‐You Hao

и другие.

Plant Cell & Environment, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 18, 2024

Transpirational cooling is crucial for plant thermal regulation to avoid overheating; however, during prolonged and/or acute heat stress it often necessitates stomatal closure reduce the risk of hydraulic failure due dehydration. The intricate interplay between regulation, water transport and use may govern performance in water-limited simultaneously heat-stressed environments, yet this remains inadequately understood. Here, a common garden, we evaluated functional associations among physiological characteristics related leaf thermoregulation, tolerance, xylem transport, eight shrub species commonly used fixing active sand dunes northern China. Our study showed that traits associated with adaptation hydraulics were closely regulation. More isohydric higher efficiency possessed stronger transpirational capacity; whereas more anisohydric demonstrated greater tolerance overheating. Moreover, was strongly coordinated drought reflected by turgor loss point. These results underscore importance shaping adaptive strategies provide valuable insights into coupling heat-related processes plants adapted sandy land environments prone combined stresses.

Язык: Английский

Процитировано

0