Coffee genotypes morphophysiological adaptation under coffee leaf rust biotic stress

dc.contributor.authorViana, Mariana Thereza Rodrigues
dc.contributor.authorAzevedo, Harianna Paula Alves de
dc.contributor.authorPereira, Fernanda Aparecida Castro
dc.contributor.authorCarvalho, Milene Alves de Figueiredo
dc.contributor.authorGuimarães, Rubens José
dc.date.accessioned2022-05-04T13:29:19Z
dc.date.available2022-05-04T13:29:19Z
dc.date.issued2021
dc.description.abstractThe identification of morphophysiological traits responsible for a better plant behavior when infected is useful for cultivar selection, and become crucial for breeding. We investigated the morphophysiological behavior of coffee genotypes before and after inoculation with the pathogen Hemileia vastatrix, causal agent of coffee rust. With multivariate techniques we identified the characteristics that most contribute to total genetic divergence of the geno types. Ten genotypes of Coffea arabica from the Germplasm Bank of Coffee from Minas Gerais were sown in a nursery and then take to a greenhouse with controlled temperature and humidity. After one month of acclimatization, the artificial inoculation with the fungus H. vastatrix was carried out. The anatomical and physiological evaluations were performed 1 day before inoculation and 160 days after inoculation. When the first symptom emerged, plants were evaluated according to a descriptive scale for coffee rust. We observed significant differences in rust severity and ostiole opening between genotypes. Different groups were formed by the K-means method, based on morphophysiological characteristics. This shows that genetic variability exists between the coffee genotypes evaluated before and after inoculation with the pathogen. The most important characteristics that contributed to the total genetic divergence were xylem vessel diameter and stomatal conductance. In conclusion, inoculation with H. vastatrix caused a change in coffee geno types based on morphophysiological characteristics.pt_BR
dc.formatpdfpt_BR
dc.identifier.citationVIANA, M. T. R. et al. Coffee genotypes morphophysiological adaptation under coffee leaf rust biotic stress. Coffee Science, Lavras, v. 16, p. 1-11, 2021.pt_BR
dc.identifier.issn1984-3909
dc.identifier.urihttps://doi.org/10.25186/.v16i.1949pt_BR
dc.identifier.urihttp://www.sbicafe.ufv.br/handle/123456789/13510
dc.language.isoenpt_BR
dc.publisherEditora UFLApt_BR
dc.relation.ispartofseriesCoffee Science:v.16, 2021;
dc.rightsOpen Accesspt_BR
dc.subjectCoffea arabicapt_BR
dc.subjectCanonical variablespt_BR
dc.subjectHemileia vastatrixpt_BR
dc.subject.classificationCafeicultura::Genética e melhoramentopt_BR
dc.titleCoffee genotypes morphophysiological adaptation under coffee leaf rust biotic stresspt_BR
dc.typeArtigopt_BR

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