Grassland plants show no relationship between leaf drought tolerance and soil moisture affinity, but rapidly adjust to changes in soil moisture

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F19%3A43899393" target="_blank" >RIV/60076658:12310/19:43899393 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/67985939:_____/19:00511546

Výsledek na webu

<a href="https://besjournals.onlinelibrary.wiley.com/doi/epdf/10.1111/1365-2435.13312" target="_blank" >https://besjournals.onlinelibrary.wiley.com/doi/epdf/10.1111/1365-2435.13312</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/1365-2435.13312" target="_blank" >10.1111/1365-2435.13312</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Grassland plants show no relationship between leaf drought tolerance and soil moisture affinity, but rapidly adjust to changes in soil moisture

Popis výsledku v původním jazyce

Assessing drought tolerance and the ability of plants to adjust to changes in available water resources is crucial for understanding current and future distributions of plant species. While turgor loss point ((tlp)) has been recognized as a direct determinant of drought tolerance in woody plants, information on it for grassland species is largely missing. We first validated a rapid method to estimate (tlp) for grassland species, using osmometry measurements ((tlp-osm)) of osmotic potential at full hydration ((o-osm)), originally proposed for woody species. We confirmed that (o-osm) was tightly positively related to (tlp) measured by the classic pressure-volume curve ((tlp-pv)). Cell wall elasticity was not important in the maintenance of turgor and neither specific leaf area nor leaf dry matter content influenced (tlp.) We then studied the relationship between (tlp-osm) measured under controlled conditions and species&apos; soil moisture affinity (Ellenberg indicator values) in 40 diverse grassland species from the full range of soil moisture conditions found in temperate grasslands. On a subset of 12 species, we studied the adjustment in (tlp-osm) to drought stress and recovery from drought. We hypothesized that dry grassland species are better adapted to drier conditions by having comparatively higher leaf drought tolerance (more negative (tlp)) and a better ability to adjust to acute drought stress. We found that (tlp-osm) was unrelated to species&apos; soil moisture affinity. However, all species developed higher leaf drought tolerance by decreasing (tlp-osm) after seven weeks of drought stress. After only one week of recovery, all species reduced the leaf drought tolerance back to the (tlp-osm) level comparable with non-stressed plants. Our results considerably extend the relationship between (o-osm) and (tlp), originally defined for woody species, and thus propose a yet unexploited direct method for assessing leaf drought tolerance via turgor loss point in herbaceous species. However, the lack of relationship between (tlp) and soil moisture affinity suggests that, unlike in woody plants, leaf-level drought tolerance in grassland plants does not fully translate into whole-plant drought resistance, suggesting an importance of other drought resistance strategies. A plain language summary is available for this article.

Název v anglickém jazyce

Grassland plants show no relationship between leaf drought tolerance and soil moisture affinity, but rapidly adjust to changes in soil moisture

Popis výsledku anglicky

Assessing drought tolerance and the ability of plants to adjust to changes in available water resources is crucial for understanding current and future distributions of plant species. While turgor loss point ((tlp)) has been recognized as a direct determinant of drought tolerance in woody plants, information on it for grassland species is largely missing. We first validated a rapid method to estimate (tlp) for grassland species, using osmometry measurements ((tlp-osm)) of osmotic potential at full hydration ((o-osm)), originally proposed for woody species. We confirmed that (o-osm) was tightly positively related to (tlp) measured by the classic pressure-volume curve ((tlp-pv)). Cell wall elasticity was not important in the maintenance of turgor and neither specific leaf area nor leaf dry matter content influenced (tlp.) We then studied the relationship between (tlp-osm) measured under controlled conditions and species&apos; soil moisture affinity (Ellenberg indicator values) in 40 diverse grassland species from the full range of soil moisture conditions found in temperate grasslands. On a subset of 12 species, we studied the adjustment in (tlp-osm) to drought stress and recovery from drought. We hypothesized that dry grassland species are better adapted to drier conditions by having comparatively higher leaf drought tolerance (more negative (tlp)) and a better ability to adjust to acute drought stress. We found that (tlp-osm) was unrelated to species&apos; soil moisture affinity. However, all species developed higher leaf drought tolerance by decreasing (tlp-osm) after seven weeks of drought stress. After only one week of recovery, all species reduced the leaf drought tolerance back to the (tlp-osm) level comparable with non-stressed plants. Our results considerably extend the relationship between (o-osm) and (tlp), originally defined for woody species, and thus propose a yet unexploited direct method for assessing leaf drought tolerance via turgor loss point in herbaceous species. However, the lack of relationship between (tlp) and soil moisture affinity suggests that, unlike in woody plants, leaf-level drought tolerance in grassland plants does not fully translate into whole-plant drought resistance, suggesting an importance of other drought resistance strategies. A plain language summary is available for this article.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10618 - Ecology

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Functional Ecology

ISSN

0269-8463

e-ISSN

—

Svazek periodika

33

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

12

Strana od-do

774-785

Kód UT WoS článku

000471332200003

EID výsledku v databázi Scopus

2-s2.0-85062979078