Título:	Photochemical efficiency correlated with candidate gene expression promote coffee drought tolerance.
Autoria:	SANTOS, M. de O. COELHO, L. S. CARVALHO, G. R. BOTELHO, C. E. TORRES, L. F. VILELA, D. J. M. ANDRADE, A. C. SILVA, V. A.
Afiliação:	MELINE DE OLIVEIRA SANTOS, EMPRESA DE PESQUISA AGROPECUÁRIA DE MINAS GERAIS; LARISSA SOUSA COELHO, UNIVERSIDADE FEDERAL DE LAVRAS; GLADYSTON RODRIGUES CARVALHO, EMPRESA DE PESQUISA AGROPECUÁRIA DE MINAS GERAIS; CESAR ELIAS BOTELHO, EMPRESA DE PESQUISA AGROPECUÁRIA DE MINAS GERAIS; LUANA FERREIRA TORRES, UNIVERSIDADE FEDERAL DE LAVRAS; DIEGO JÚNIOR MARTINS VILELA, EMPRESA DE PESQUISA AGROPECUÁRIA DE MINAS GERAIS; ALAN CARVALHO ANDRADE, CNPCa; VÂNIA APARECIDA SILVA, EMPRESA DE PESQUISA AGROPECUÁRIA DE MINAS GERAIS.
Ano de publicação:	2021
Referência:	Scientific Reports, v. 11, 7436, 2021.
Páginas:	14 p.
Conteúdo:	The aim of this study was to identify the correlation between photochemical efficiency and candidate genes expression to elucidate the drought tolerance mechanisms in coffee progenies (Icatu Vermelho IAC 3851-2 x Catimor UFV 1602-215) previously identified as tolerant in field conditions. Four progenies (2, 5, 12 and 15) were evaluated under water-deficit conditions (water deficit imposed 8 months after transplanting seedlings to the pots) and under irrigated system. Evaluations of physiological parameters and expression of candidate genes for drought tolerance were performed. Progeny 5 showed capacity to maintain water potential, which contributed to lower qP variation between irrigated and deficit conditions. However, the increases of qN and NPQ in response to stress indicate that this progeny is photochemically responsive to small variations of am protecting the photosystem and maintaining qP. Data obtained for progeny 12 indicated a lower water status maintenance capacity, but with increased qN and NPQ providing maintenance of the PSII and ETR parameters. A PCA analysis revealed that the genes coding regulatory proteins, ABA-synthesis, cellular protectors, isoforms of ascorbate peroxidase clearly displayed a major response to drought stress and discriminated the progenies 5 and 12 which showed a better photochemical response. The genes CaMYB1, CaERF017, CaEDR2, CaNCED, CaAPX1, CaAPX5, CaGolS3, CaDHN1 and CaPYL8a were up-regulated in the arabica coffee progenies with greater photochemical efficiency under deficit and therefore contributing to efficiency of the photosynthesis in drought tolerant progenies.
Thesagro:	Resistência a Seca Resistência Genética Coffea Arábica
NAL Thesaurus:	Photochemical reactions Drought tolerance Coffea arabica var. arabica
Digital Object Identifier:	https://doi.org/10.1038/s41598-021-86689-y
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (SAPC)