Terminal drought-tolerant pearl millet [Pennisetum glaucum (L.) R. Br.] have high leaf ABA and limit transpiration at high vapour pressure deficit

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F10%3A10081155" target="_blank" >RIV/00216208:11310/10:10081155 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Terminal drought-tolerant pearl millet [Pennisetum glaucum (L.) R. Br.] have high leaf ABA and limit transpiration at high vapour pressure deficit

Popis výsledku v původním jazyce

Pearl millet genotypes carrying a terminal drought tolerance QTL have a lower transpiration rate (Tr) under well-watered conditions than sensitive lines. Here experiments were carried out to test whether this relates to leaf ABA at high VPD, and whetherthat leads to transpiration efficiency differences. Most genotypic differences were found under well-watered conditions. ABA levels under these conditions were higher in tolerant genotypes, including NIL-QTLs, and ABA did not increase under water stress.Well-watered Tr was lower in tolerant genotypes at all VPD levels. It is concluded that two water-saving mechanisms may operate under well-watered conditions in tolerant pearl millet: a low Tr even at low VPD, which may relate to leaf ABA; and a sensitivity to higher VPD that further restricts Tr, suggesting the involvement of hydraulic signals. Both traits could contribute to absolute water saving. This deserves consideration in the breeding of terminal drought-tolerant lines.

Název v anglickém jazyce

Terminal drought-tolerant pearl millet [Pennisetum glaucum (L.) R. Br.] have high leaf ABA and limit transpiration at high vapour pressure deficit

Popis výsledku anglicky

Pearl millet genotypes carrying a terminal drought tolerance QTL have a lower transpiration rate (Tr) under well-watered conditions than sensitive lines. Here experiments were carried out to test whether this relates to leaf ABA at high VPD, and whetherthat leads to transpiration efficiency differences. Most genotypic differences were found under well-watered conditions. ABA levels under these conditions were higher in tolerant genotypes, including NIL-QTLs, and ABA did not increase under water stress.Well-watered Tr was lower in tolerant genotypes at all VPD levels. It is concluded that two water-saving mechanisms may operate under well-watered conditions in tolerant pearl millet: a low Tr even at low VPD, which may relate to leaf ABA; and a sensitivity to higher VPD that further restricts Tr, suggesting the involvement of hydraulic signals. Both traits could contribute to absolute water saving. This deserves consideration in the breeding of terminal drought-tolerant lines.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

ED - Fyziologie

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)<br>V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Rok uplatnění

2010

Kód důvěrnosti údajů

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

Název periodika

Journal of Experimental Botany

ISSN

0022-0957

e-ISSN

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Svazek periodika

61

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

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Kód UT WoS článku

000275567500016

EID výsledku v databázi Scopus

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