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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Stomatal response to drought is modulated by gibberellin in tomato

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Author(s):
Gaion, Lucas A. [1] ; Carvalho, Rogerio F. [2]
Total Authors: 2
Affiliation:
[1] Univ Marilia, Ctr Ciencias Agr, Ave Higino Muzzy Filho 1001, BR-17525902 Marilia, SP - Brazil
[2] Sao Paulo State Univ, Dept Biol Appl Agr, Via Acesso Prof Paulo Donato Castellane, BR-14884900 Jaboticabal, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: ACTA PHYSIOLOGIAE PLANTARUM; v. 43, n. 9 SEP 2021.
Web of Science Citations: 0
Abstract

It has been shown that gibberellin (GA) perception is part of root-to-shoot communication in plants during drought. However, it is not clear how GA content interferes with long-distance drought response signaling. Thus, in this study, the tomato (Solanum lycopersicum L.) cultivar Micro-Tom (MT) was treated with 50 mM acid gibberellic, while the control plants were sprayed with water. After treatment, tomato plants were reciprocally grafted (i.e., MT/MT, MT + GA/MT + GA, MT + GA/MT, MT/MT + GA; within each pair, the first indicates the scion, and the second indicates the rootstock). Therefore, to evaluate the role of GA in root-to-shoot communication during drought stress, plants were grown under well-watered or drought conditions. Height, leaf and root area, dry weight, malondialdehyde content, relative water content and stomatal conductance were measured. It was verified that the MT + GA/MT and MT + GA/MT + GA plants were taller than the grafted plants without GA treatment. Furthermore, non-treated plants (MT/MT) exhibited a reduction in root area due to water-deficit. Regarding water relations, under drought, the greatest reduction in stomatal conductance was observed in plants grafted onto rootstocks treated with GA, which favored the maintenance of an increased relative water content. This demonstrates an important role of GA in root-to-shoot communication to induce stomatal closure during water-deficit conditions. (AU)

FAPESP's process: 14/19165-2 - Using of a mutant in gibberellin in grafting of the tomato to study signaling this hormone between roots and shoots during water deficit
Grantee:Lucas Aparecido Gaion
Support Opportunities: Scholarships in Brazil - Doctorate