Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 508186
Title Low levels of strigolactones in roots as a component of the systemic signal of drought stress in tomato
Author(s) Visentin, Ivan; Vitali, Marco; Ferrero, Manuela; Zhang, Yanxia; Ruyter-Spira, Carolien; Novák, Ondřej; Strnad, Miroslav; Lovisolo, Claudio; Schubert, Andrea; Cardinale, Francesca
Source New Phytologist 212 (2016)4. - ISSN 0028-646X - p. 954 - 963.
DOI http://dx.doi.org/10.1111/nph.14190
Department(s) Laboratory of Plant Physiology
EPS
Publication type Refereed Article in a scientific journal
Publication year 2016
Keyword(s) Abscisic acid (ABA) - Drought - Strigolactones (SL) - Systemic signalling - Tomato (Solanum lycopersicum)
Abstract

Strigolactones (SL) contribute to drought acclimatization in shoots, because SL-depleted plants are hypersensitive to drought due to stomatal hyposensitivity to abscisic acid (ABA). However, under drought, SL biosynthesis is repressed in roots, suggesting organ specificity in their metabolism and role. Because SL can be transported acropetally, such a drop may also affect shoots, as a systemic indication of stress. We investigated this hypothesis by analysing molecularly and physiologically wild-type (WT) tomato (Solanum lycopersicum) scions grafted onto SL-depleted rootstocks, compared with self-grafted WT and SL-depleted genotypes, during a drought time-course. Shoots receiving few SL from the roots behaved as if under mild stress even if irrigated. Their stomata were hypersensitive to ABA (likely via a localized enhancement of SL synthesis in shoots). Exogenous SL also enhanced stomata sensitivity to ABA. As the partial shift of SL synthesis from roots to shoots mimics what happens under drought, a reduction of root-produced SL might represent a systemic signal unlinked from shootward ABA translocation, and sufficient to prime the plant for better stress avoidance.

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