Attenuated accumulation of jasmonates modifies stomatal responses to water deficit
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Altres documents de l'autoria: de Ollas, Carlos; Arbona, Vicent; Gomez-Cadenas, Aurelio; Dodd, Ian Charles
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Mostra el registre complet de l'elementcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/2508
comunitat-uji-handle3:10234/6999
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Títol
Attenuated accumulation of jasmonates modifies stomatal responses to water deficitData de publicació
2018-02Editor
Oxford University Press; Society for Experimental BiologyCita bibliogràfica
DE OLLAS, Carlos, et al. Attenuated accumulation of jasmonates modifies stomatal responses to water deficit. Journal of experimental botany, 2018, 69.8: 2103-2116.Tipus de document
info:eu-repo/semantics/articleVersió de l'editorial
https://academic.oup.com/jxb/article/69/8/2103/4844888Versió
info:eu-repo/semantics/publishedVersionParaules clau / Matèries
Resum
To determine whether drought-induced root jasmonate [jasmonic acid (JA) and jasmonic acid-isoleucine (JA-Ile)] accumulation affected shoot responses to drying soil, near-isogenic wild-type (WT) tomato (Solanum lycop ... [+]
To determine whether drought-induced root jasmonate [jasmonic acid (JA) and jasmonic acid-isoleucine (JA-Ile)] accumulation affected shoot responses to drying soil, near-isogenic wild-type (WT) tomato (Solanum lycopersicum cv. Castlemart) and the def-1 mutant (which fails to accumulate jasmonates during water deficit) were self- and reciprocally grafted. Rootstock hydraulic conductance was entirely rootstock dependent and significantly lower in def-1, yet def-1 scions maintained a higher leaf water potential as the soil dried due to their lower stomatal conductance (gs). Stomatal sensitivity to drying soil (the slope of gsversus soil water content) was low in def-1 self-grafts but was normalized by grafting onto WT rootstocks. Although soil drying increased 12-oxo-phytodienoic acid (OPDA; a JA precursor and putative antitranspirant) concentrations in def-1 scions, foliar JA accumulation was negligible and foliar ABA accumulation reduced compared with WT scions. A WT rootstock increased drought-induced ABA and JA accumulation in def-1 scions, but decreased OPDA accumulation. Xylem-borne jasmonates were biologically active, since supplying exogenous JA via the transpiration stream to detached leaves decreased transpiration of WT seedlings but had the opposite effect in def-1. Thus foliar accumulation of both ABA and JA at WT levels is required for both maximum (well-watered) gs and stomatal sensitivity to drying soil. [-]
Proyecto de investigación
EU ROOTOPOWER (contract no. 289365) ; Ministerio de Economia of Spain (MINECO) (AGL2016-76574)Drets d'accés
© The Author(s) 2018. Published by Oxford University Press on behalf of the Society for Experimental Biology.
info:eu-repo/semantics/openAccess
info:eu-repo/semantics/openAccess
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