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https://locus.ufv.br//handle/123456789/22338
Tipo: | Artigo |
Título: | Transcriptional memory contributes to drought tolerance in coffee (Coffea canephora) plants |
Autor(es): | DaMatta, Fábio Murilo Nobres, Priscilla Ferreira, Daniela Cristina Rodrigues Menezes-Silva, Paulo Eduardo Ribeiro-Alves, Marcelo Correa, Régis Lopes Alves-Ferreira, Márcio Guedes, Fernanda Alves de Freitas |
Abstract: | Water deprivation is an important limiting factor in the productivity of crops like coffee. In addition to transcription factors (TFs) and small non-coding RNAs, transcriptional memory seems to act in gene expression modulation during plant drought response. Here, a RNA-Seq approach was used to investigate the drought responses of Coffea canephora clones 109 and 120, which are respectively sensitive and tolerant to drought. Illumina sequencing allowed us to identify differentially expressed genes (DEG) in the tolerant (826) and sensitive (135) clones and their enriched categories. Our results indicate that the sensitive clone may trigger an oxidative stress response, possibly leading to programmed cell death, when exposed to multiple drought episodes. The acclimation of tolerant plants, on the other hand, seems to involve antioxidant secondary metabolism and the ABA response. Most importantly, 49 memory genes were identified in the tolerant clone. They were mainly linked to the ABA pathway, protein folding and biotic stress. Small RNA profiling also identified regulatory microRNAs in coffee leaves, including hundreds of putative novel ones. Our findings strongly suggest that transcriptional memory modulates the expression of drought-responsive genes and contributes to drought tolerance in C. canephora. |
Palavras-chave: | Abscisic acid Coffea canephora Drought Oxidative stress Receptor-like kinases Transcriptional memory |
Editor: | Environmental and Experimental Botany |
Tipo de Acesso: | Elsevier B.V. |
URI: | https://doi.org/10.1016/j.envexpbot.2017.12.004 http://www.locus.ufv.br/handle/123456789/22338 |
Data do documento: | 10-Dez-2017 |
Aparece nas coleções: | Artigos |
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artigo.pdf Until 2100-12-31 | texto completo | 1,81 MB | Adobe PDF | Visualizar/Abrir ACESSO RESTRITO |
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