Phakopsora montana, another grapevine leaf rust pathogen in Japan

被引:0
|
作者
Yoshitaka Ono
Sinchai Chatasiri
Siriporn Pota
Yuichi Yamaoka
机构
[1] Ibaraki University,Faculty of Education
[2] Ibaraki University,Graduate School of Science and Engineering
[3] Novartis Crop Protection (Thailand) Ltd.,Graduate School of Life and Environmental Sciences
[4] University of Tsukuba,undefined
来源
Journal of General Plant Pathology | 2012年 / 78卷
关键词
Heteroecism; Host specificity; Meliosmaceae; Pucciniales; Vitaceae;
D O I
暂无
中图分类号
学科分类号
摘要
A new grapevine leaf rust (GLR) was found to be caused by Phakopsora montana. This new fungus naturally infects Crimson Glory vine (Vitis coignetiae), forming uredinia and telia on the leaves. Under experimental conditions, the fungus was pathogenic to table grape cultivars Delaware and Kyoho (V. × labruscana), Amur River grape (V. amurensis), and V. ficifolia, on which it produced urediniospores. Inoculation experiments proved that the pathogen alternates hosts, forming spermogonia and aecia on Meliosma tenuis. The new pathogen resembles P. meliosmae-myrianthae (=P. euvitis), a common GLR fungus; however, its spermogonial/aecial stage is restricted to M. tenuis, contrary to P. meliosmae-myrianthae with its spermogonial/aecial stage restricted to M. myriantha. Aeciospores of the new pathogen are evenly thin-walled, whereas the aeciospore wall is conspicuously thickened apically in P. meliosmae-myrianthae. Phakopsora montana is known to occur only on V. coignetiae in nature; however, table grape cultivars Delaware and Kyoho were not resistant to P. montana under experimental conditions. These results indicate that P. montana has caused a certain proportion of the GLR disease recorded in Japan with a possible mixed infection with P. meliosmae-myrianthae.
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页码:338 / 347
页数:9
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