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Differential gene expression in response to water deficit in leaf and root tissues of soybean genotypes with contrasting tolerance profiles.


ABSTRACT: Water deficit is one of the major limitations to soybean production worldwide, yet the genetic basis of drought-responsive mechanisms in crops remains poorly understood. In order to study the gene expression patterns in leaves and roots of soybean, two contrasting genotypes, Embrapa 48 (drought-tolerant) and BR 16 (drought-sensitive), were evaluated under moderate and severe water deficit. Transcription factors from the AP2/EREBP and WRKY families were investigated. Embrapa 48 showed 770 more up-regulated genes than BR 16, in eight categories. In general, leaves presented more differentially expressed genes (DEGs) than roots. Embrapa 48 responded to water deficit faster than BR 16, presenting a greater number of DEGs since the first signs of drought. Embrapa 48 exhibited initial modulation of genes associated with stress, while maintaining the level of the ones related to basic functions. The genes expressed exclusively in the drought-tolerant cultivar, belonging to the category of dehydration responsive genes, and the ones with a contrasting expression pattern between the genotypes are examples of important candidates to confer tolerance to plants. Finally, this study identified genes of the AP2/EREBP and WRKY families related to drought tolerance.

SUBMITTER: Reis RR 

PROVIDER: S-EPMC7263426 | biostudies-literature | 2020 Jan-Mar

REPOSITORIES: biostudies-literature

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Differential gene expression in response to water deficit in leaf and root tissues of soybean genotypes with contrasting tolerance profiles.

Reis Rafaela Ribeiro RR   Mertz-Henning Liliane Marcia LM   Marcolino-Gomes Juliana J   Rodrigues Fabiana Aparecida FA   Rockenbach-Marin Silvana S   Fuganti-Pagliarini Renata R   Koltun Alessandra A   Gonçalves Leandro Simões Azeredo LSA   Nepomuceno Alexandre Lima AL  

Genetics and molecular biology 20200101 2


Water deficit is one of the major limitations to soybean production worldwide, yet the genetic basis of drought-responsive mechanisms in crops remains poorly understood. In order to study the gene expression patterns in leaves and roots of soybean, two contrasting genotypes, Embrapa 48 (drought-tolerant) and BR 16 (drought-sensitive), were evaluated under moderate and severe water deficit. Transcription factors from the AP2/EREBP and WRKY families were investigated. Embrapa 48 showed 770 more up  ...[more]

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