Autoria: PEREIRA, W. J.; MELO, A. T. de O.; COELHO, A. S. G.; RODRIGUES, F. A.; MAMIDI, S.; ALENCAR, S. A. de; LANNA, A. C.; VALDISSER, P. A. M. R.; BRONDANI, C.; NASCIMENTO JUNIOR, I. R. do; BORBA, T. C. de O.; VIANELLO, R. P.

Resumo: Genes related to the response to drought stress in leaf and root tissue of drought-susceptible (DS) and tolerant (DT) genotypes were characterized by RNA-Seq. In total, 54,750 transcripts, representative of 28,590 genes, were identified; of these, 1,648 were of high-fidelity (merge of 12 libraries) and described for the first time in the Andean germplasm. From the 1,239 differentially expressed genes (DEGs), 458 were identified in DT, with a predominance of genes in categories of oxidative stress, response to stimulus and kinase activity. Most genes related to oxidation-reduction terms in roots were early triggered in DT (T75) compared to DS (T150) suggestive of a mechanism of tolerance by reducing the damage from ROS. Among the KEGG enriched by DEGs up-regulated in DT leaves, two related to the formation of Sulfur-containing compounds, which are known for their involvement in tolerance to abiotic stresses, were common to all treatments. Through qPCR, 88.64% of the DEGs were validated. A total of 151,283 variants were identified and functional effects estimated for 85,780. The raw data files were submitted to the NCBI database. A transcriptome map revealed new genes and isoforms under drought. These results supports a better understanding of the drought tolerance mechanisms in beans.

Ano de publicação: 2020

Tipo de publicação: Artigo de periódico

Unidade: Embrapa Arroz e Feijão

Palavras-chave: Beans, Deficiência Hídrica, Feijão, Folha, Functional genomics, Genomics, Phaseolus Vulgaris, Raiz, Single nucleotide polymorphism, Soil water deficit