The jasmonic acid pathway, rather than abscisic acid, may partly explain contrasting stomatal responses in two strawberry cultivars under osmotic stress

Britt Merlaen, Ellen De Keyser, Marie-Christine Van Labeke

Onderzoeksoutput: Bijdrage aan tijdschriftA1: Web of Science-artikelpeer review

Uittreksel

Drought is a major threat in agriculture and horticulture, including commercial strawberry production. Here, we compare hormonal regulation of a first-line drought stress response, namely stomatal closure, in two Fragaria x ananassa cultivars, known to differ in their drought stress phenotype. We show that the observed difference in xylem abscisic acid accumulation cannot explain the different stomatal responses under osmotic stress. Foliar abscisic acid accumulation cannot fully account for the stomatal behavior in one of both cultivars either. An indirect effect of abscisic acid on stomatal conductance via an impact on leaf hydraulic conductance, possibly mediated via aquaporins, as is recently proposed in literature, was not observed here. Next, we show that these two cultivars respond differently to jasmonic acid and one of its precursors. This difference in sensitivity of the jasmonates pathway between both cultivars may partly explain the different stomatal response. This study contributes to the understanding of the regulation of an important drought stress response in an economically important crop prone to water deficit stress.
Oorspronkelijke taalEngels
TijdschriftPlant Physiology and Biochemistry
Volume151
Pagina's (van-tot)21-33
Aantal pagina’s13
ISSN0981-9428
DOI's
PublicatiestatusGepubliceerd - jun-2020

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