Title:	Selection of genotypes of Coffea arabica for drought tolerance based on anatomical and physiological characteristics.
Authors:	SANTOS, C. S. dos FREITAS, A. F. de SILVA, G. H. B. da TAVARES, M. C. dos S. CARVALHO, M. A. de F. SANTOS, M. de O. CARVALHO, G. R. SILVA, V. A.
Affiliation:	CYNTIA STEPHÂNIA DOS SANTOS, EMPRESA DE PESQUISA AGROPECUÁRIA DE MINAS GERAIS; ANA FLÁVIA DE FREITAS, EMPRESA DE PESQUISA AGROPECUÁRIA DE MINAS GERAIS; GLAUBER HENRIQUE BARBOSA DA SILVA, UNIVERSIDADE FEDERAL DE LAVRAS; MARIA CLARA DOS SANTOS TAVARES, UNIVERSIDADE FEDERAL DE LAVRAS; MILENE ALVES DE FIGUEIREDO CARVALHO, CNPCA; MELINE DE OLIVEIRA SANTOS, EMPRESA DE PESQUISA AGROPECUÁRIA DE MINAS GERAIS; GLADYSTON RODRIGUES CARVALHO, EMPRESA DE PESQUISA AGROPECUÁRIA DE MINAS GERAIS; VÂNIA APARECIDA SILVA, EMPRESA DE PESQUISA AGROPECUÁRIA DE MINAS GERAIS.
Date Issued:	2025
Citation:	Rodriguésia, v. 76, e00542024, 2025.
Pages:	18 p.
Description:	Climate change affects crop productivity, with forecasts for the coming years pointing to increased temperatures and changes in rainfall distribution. This paper aimed to identify genotypes of Coffea arabica that are potentially drought-tolerant. Seven germplasm genotypes of Timor Hybrid were evaluated in comparison to two cultivars considered as sensitive and drought-tolerant. These were submitted to two water treatments, the first maintaining water availability and the second with complete suspension of irrigation. The physiological characteristics analyzed were gas exchange and predawn leaf water potential. For leaf anatomy, characteristics of the leaf lamina, conductive vessels and stomata were evaluated. It was found that some genotypes were able to maintain gas exchange even under low water availability. For these genotypes, the analysis of leaf anatomy presented an increase in cuticle thickness on the adaxial face, in the relationship between polar and equatorial diameters of stomata, in addition to a lower vulnerability index. A positive relationship was observed between adaxial phase cuticle thickness and water use efficiency. The Timor Hybrid UFV 377-21, UFV 376-31 and the cultivar IPR100 were the highlights among the genotypes analyzed, which presented adaptations that allowed the maintenance of the hydric status in the initial development phase.
Thesagro:	Melhoramento Genético Vegetal Coffea Arábica
NAL Thesaurus:	Abiotic stress Genetic improvement
DOI:	https://doi.org/10.1590/2175-7860202576002
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (SAPC)