Data/hora: 08/06/2024 17:27:41

Provedor de dados: | 1
País: | Brazil
Título: | Older leaf tissues in younger plants are more susceptible to soybean rust
Autores: | Xavier, Sheila Ariana; Martins, Daiane Cristina; Fantin, Lucas Henrique; Canteri, Marcelo Giovanetti.
Data: | 2017-01-01
Ano: | 2017
Palavras-chave: | 5.00.00.00-4; 5.01.00.00-9; 5.01.02.00-1 Phakopsora pachyrhizi; Phenological stage; Age of trifoliates Fitopatologia.
Resumo: | The aim of this study was to clarify the relationship between soybean leaf/plant age and the susceptibility to infection by Phakopsora pachyrhizi. Two studies were conducted in the greenhouse during the 2009/2010 season using the BRS 232 cultivar. The experimental design for Study 1 was fully randomized in a 2 x 3 factorial arrangement (phenological stage x age of the 4th, 5th and 6th trifoliate at the time of inoculation), and in Study 2, the experimental design was fully randomized with five treatments (T) and four replicates. The variables assessed were disease severity, number of lesions, uredinia per lesion, and viable spores. In Study 1, it was observed that disease severity was lower when the plant was in the growth stage V6 (11.4%), compared to the reproductive stage R4 (16.9%). The regression for disease severity and leaf age at the time of inoculation showed that older trifoliates on the plants in the reproductive stage exhibited higher severity. However, in Study 2, for trifoliates of the same age on plants of different ages, the trifoliates of younger plants were more susceptible to the disease. It was concluded that soybean plant susceptibility to soybean rust was directly proportional to the age of the trifoliate on a given plant and the phenological stage of the plant at the time of inoculation.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês

Identificador:

http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/30638

10.4025/actasciagron.v39i1.30638

Editor: | Universidade Estadual de Maringá
Relação: | http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/30638/pdf
Formato: | application/pdf

Fonte:

Acta Scientiarum. Agronomy; v. 39, n. 1 (2017); 17-24

Acta Scientiarum. Agronomy; v. 39, n. 1 (2017); 17-24

1807-8621

1679-9275

Fonte: | Direitos autorais 2017 Acta Scientiarum. Agronomy