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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

iverse effects of temperature on in vivo and in vitro germination of urediniospores of Neophysopella tropicali

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Author(s):
Rasera, J. B. [1, 2] ; Amorim, L. [3] ; Appezzato-da-Gloria, B. [1]
Total Authors: 3
Affiliation:
[1] Univ Sao Paulo, Dept Ciencias Biol, Escola Super Agr Luiz de Queiroz, BR-13418900 Piracicaba - Brazil
[2] Univ Sao Paulo, Dept Engn Biossistemas, Escola Super Agr Luiz de Queiroz, BR-13418900 Piracicaba - Brazil
[3] Univ Sao Paulo, Dept Fitopatol & Nematol, Escola Super Agr Luiz de Queiroz, BR-13418900 Piracicaba - Brazil
Total Affiliations: 3
Document type: Journal article
Source: European Journal of Plant Pathology; v. 162, n. 2 OCT 2021.
Web of Science Citations: 0
Abstract

Tropical Asian grapevine leaf rust, caused by Neophysopella tropicalis, is an important grapevine disease in the tropics. The germination of N. tropicalis urediniospores in vitro is highly variable, even with standardized methodology. It has been demonstrated that at 30 degrees C, there is a low proportion of urediniospores germination on Petri dishes; however, at the same temperature, the severity of rust is remarkably high. The objective of this study was to estimate the proportion of urediniospores germination of N. tropicalis in vitro and in vivo at different temperatures. The in vitro assays were carried out with polystyrene dishes and the in vivo assays were performed on detached leaves of grapevines cv. Niagara Rosada and cv. Cabernet Sauvignon. A generalized beta model was fitted to the proportion of urediniospores germination as a function of temperature by non-linear regressions. The proportions of urediniospores germination of N. tropicalis were higher in vivo than in vitro, regardless the temperature. Urediniospore germination was inhibited at 35 degrees C. The optimal temperature for the germination of N. tropicalis urediniospores was 20 degrees C in vitro and 25 degrees C in vivo. The wide range of optimum temperature for the germination of N. tropicalis urediniospores on grapevine leaves may explain the importance of tropical Asian grapevine leaf rust in the tropics, as well as the increased disease severity observed at 30 degrees C. (AU)

FAPESP's process: 19/13191-5 - Epidemiological components, damage characterization and control of tropical and temperate rusts at a global climate change scenario
Grantee:Marcel Bellato Spósito
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 13/24003-9 - Grape diseases: epidemiology, damage assessment and control
Grantee:Lilian Amorim
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 19/15191-2 - Can the stress caused by temperature affect the grapevine rust pathosystem? Epidemiologic, physiological and histopathological analyses in Vitis labrusca 'Niagara Rosada' and V. vinifera 'Cabernet'
Grantee:Júlia Boscariol Rasera
Support Opportunities: Scholarships in Brazil - Master