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Molecular plant responses to combined abiotic stresses put a spotlight on unknown and abundant genes.

Abstract：

:Environmental stresses such as drought, heat, and salinity limit plant development and agricultural productivity. While individual stresses have been studied extensively, much less is known about the molecular interaction of responses to multiple stresses. To address this problem, we investigated molecular responses of Arabidopsis to single, double, and triple combinations of salt, osmotic, and heat stresses. A metabolite profiling analysis indicated the production of specific compatible solutes depending on the nature of the stress applied. We found that in combination with other stresses, heat has a dominant effect on global gene expression and metabolite level patterns. Treatments that include heat stress lead to strongly reduced transcription of genes coding for abundant photosynthetic proteins and proteins regulating the cell life cycle, while genes involved in protein degradation are up-regulated. Under combined stress conditions, the plants shifted their metabolism to a survival state characterized by low productivity. Our work provides molecular evidence for the dangers for plant productivity and future world food security posed by heat waves resulting from global warming. We highlight candidate genes, many of which are functionally uncharacterized, for engineering plant abiotic stress tolerance.

journal_name

J Exp Bot

journal_title

Journal of experimental botany

authors

Sewelam N,Brilhaus D,Bräutigam A,Alseekh S,Fernie AR,Maurino VG

doi

10.1093/jxb/eraa250

subject

Has Abstract

pub_date

2020-08-06 00:00:00

pages

5098-5112

issue

16

eissn

0022-0957

issn

1460-2431

pii

5842162

journal_volume

71

pub_type

杂志文章

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