Drought survival in conifer species is related to the time required to cross the stomatal safety margin

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985939%3A_____%2F23%3A00582418" target="_blank" >RIV/67985939:_____/23:00582418 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1093/jxb/erad352" target="_blank" >https://doi.org/10.1093/jxb/erad352</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/jxb/erad352" target="_blank" >10.1093/jxb/erad352</a>

Result language

angličtina

Original language name

Drought survival in conifer species is related to the time required to cross the stomatal safety margin

Original language description

The regulation of water loss and the spread of xylem embolism have mostly been considered separately. The development of an integrated approach taking into account the temporal dynamics and relative contributions of these mechanisms to plant drought responses is urgently needed. Do conifer species native to mesic and xeric environments display different hydraulic strategies and temporal sequences under drought? A dry-down experiment was performed on seedlings of four conifer species differing in embolism resistance, from drought-sensitive to extremely drought-resistant species. A set of traits related to drought survival was measured, including turgor loss point, stomatal closure, minimum leaf conductance, and xylem embolism resistance. All species reached full stomatal closure before the onset of embolism, with all but the most drought-sensitive species presenting large stomatal safety margins, demonstrating that highly drought-resistant species do not keep their stomata open under drought conditions. Plant dry-down time to death was significantly influenced by the xylem embolism threshold, stomatal safety margin, and minimum leaf conductance, and was best explained by the newly introduced stomatal margin retention index (SMRIΨ50) which reflects the time required to cross the stomatal safety margin. The SMRIΨ50 may become a key tool for the characterization of interspecific drought survival variability in trees.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10611 - Plant sciences, botany

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2023

Confidentiality

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

Name of the periodical

Journal of Experimental Botany

ISSN

0022-0957

e-ISSN

1460-2431

Volume of the periodical

74

Issue of the periodical within the volume

21

Country of publishing house

US - UNITED STATES

Number of pages

13

Pages from-to

6847-6859

UT code for WoS article

001073345900001

EID of the result in the Scopus database

2-s2.0-85178625587