Increase in leaf temperature opens stomata and decouples net photosynthesis from stomatal conductance in Pinus taeda and Populus deltoides x nigra

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F17%3A43912353" target="_blank" >RIV/62156489:43410/17:43912353 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1093/jxb/erx052" target="_blank" >http://dx.doi.org/10.1093/jxb/erx052</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/jxb/erx052" target="_blank" >10.1093/jxb/erx052</a>

Result language

angličtina

Original language name

Increase in leaf temperature opens stomata and decouples net photosynthesis from stomatal conductance in Pinus taeda and Populus deltoides x nigra

Original language description

The effect of temperature on stomatal conductance (g(s)) and corresponding gas exchange parameters was studied in two tree species with contrasting leaf anatomy and ecophysiology-a broadleaf angiosperm, Populus deltoides x nigra (poplar), and a needle-leaf gymnosperm, Pinus taeda (loblolly pine). Experiments were conducted in growth chambers across a leaf temperature range of 19-48 degrees C. Manipulations of temperature were done in well-watered and drought soil conditions and under ambient (400 ppm) and elevated (800 ppm) air CO2 concentrations. Increases in leaf temperature caused stomatal opening at both ambient and elevated [CO2]. The gs increased by 42% in poplar and by 40% in loblolly pine when leaf temperature increased from 30 degrees C to 40 degrees C at a vapour pressure difference of 1 kPa. Stomatal limitation to photosynthesis decreased in elevated temperature in loblolly pine but not in poplar. The ratio of net photosynthesis to gs depended on leaf temperature, especially at high temperatures. Evaporative cooling of transpiring leaves resulted in reductions in leaf temperature up to 9 degrees C in well-watered poplar but only 1 degrees C in drought-stressed poplar and in loblolly pine. As global mean temperatures rise and temperature extremes become more frequent and severe, understanding the effect of temperature on g(s), and modelling that relationship, will become increasingly important.

Czech name

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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

<a href="/en/project/LD13017" target="_blank" >LD13017: Response of Scots pine physiology, xylem anatomy and wood formation to the stress</a><br>

Continuities

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

Publication year

2017

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

—

Volume of the periodical

68

Issue of the periodical within the volume

7

Country of publishing house

GB - UNITED KINGDOM

Number of pages

11

Pages from-to

1757-1767

UT code for WoS article

000400341800030

EID of the result in the Scopus database

2-s2.0-85020183658