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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.)

Evaluation of the molecular and physiological response to dehydration of two accessions of the model plant Setaria viridis

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Author(s):
Travassos-Lins, Joao [1] ; de Oliveira Rocha, Caio Cesar [1] ; Rodrigues, Tamires de Souza [1] ; Alves-Ferreira, Marcio [1]
Total Authors: 4
Affiliation:
[1] Univ Fed Rio de Janeiro, Biol Inst, Dept Genet, Lab Plant Mol Genet & Biotechnol, Av Carlos Chagas Filho, 373 Ilha do Fundao, BR-21941902 Rio De Janeiro, RJ - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Plant Physiology and Biochemistry; v. 169, p. 211-223, DEC 2021.
Web of Science Citations: 1
Abstract

Water deficits are responsible for countless agricultural losses. Among the affected crops, C4 plants are of special interest due to their high water and nitrogen use efficiency. Two accessions of Setaria viridis (Ast-1 and A10.1) with contrasting responses to water deficit were used in the current work to better understand the mechanisms behind drought tolerance in C4 species. Our results showed that although the A10.1 accession exhibited a reduced size and lower Rfd values in comparison to Ast-1, it had overall higher Fv/Fm and lower NPQ values in well-watered conditions. The water deficit induction was performed with PEG-8000 at the grain-filling stage using dehydration cycles. Analysis of physiological measurements showed the A10.1 accession as being more tolerant to multiple water deficit exposures. In addition, PCA identified a clear difference in the pattern of drought response of the accessions. Four drought marker genes previously described in the literature were chosen to evaluate the response at the molecular level: SvP5CS2, SvDHN1, SvNAC6, and SvWRKY1. Besides confirming that Ast-1 is a more sensitive accession, the expression analysis revealed that SvNAC1 might better monitor drought stress, while SvWRKY1 was able to differentiate the two accessions. Distinct evolutionary histories of each accession may be behind their differences in response to water deficits. (AU)

FAPESP's process: 08/57908-6 - National Institute of Science and Technology of Bioethanol
Grantee:Marcos Silveira Buckeridge
Support Opportunities: Program for Research on Bioenergy (BIOEN) - Thematic Grants