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引用次数: 0
摘要
2020 年和 2021 年期间，在田间条件下报告了 Nectria dematiosa 在苹果幼树和老树的茎干和枝条上表现出橙红色的包囊。观察到的特征性症状是茎干和枝条变色呈红色，随后出现纸质外观。子囊无乳头，表面不规则，由许多圆柱形至狭棍棒状的子囊组成。孢子呈椭圆形至纺锤形，直或稍弯曲，透明，有 0 至 1 个胚珠。理查德（Richard）和皇家美味（Royal Delicious）苹果品种对欧洲腐烂病的易感性较高，严重程度为中度到高度。根据核苷酸同源性和系统进化分析，病原体被确认为 N. dematiosa（登录号：OQ152022）。据我们所知，这是印度首次报道 N. dematiosa 引起苹果欧洲腐烂病。
First report of Nectria dematiosa causing European canker of apple in India
Nectria dematiosa exhibiting orange red colour perithecia on stems and branches of young and old apple trees were reported under field conditions during 2020 and 2021. Reddish discoloration followed by papery appearance of stem and branches were the characteristic symptoms observed. Ascomata were non-papillate, surface irregular comprising numerous cylindrical to narrowly clavate asci. Ascospores were ellipsoidal to fusiform, straight or slightly curved, hyaline with 0 to 1-septa. Richard and Royal Delicious variety of apple were more susceptible with moderate to high severity of the European canker. Based on nucleotide homology and phylogenetic analysis, the pathogen was confirmed as N. dematiosa (accession no. OQ152022). To the best of our knowledge, this is the first report of N. dematiosa causing European canker of apple in India.
期刊介绍：
Journal of Phytopathology publishes original and review articles on all scientific aspects of applied phytopathology in agricultural and horticultural crops. Preference is given to contributions improving our understanding of the biotic and abiotic determinants of plant diseases, including epidemics and damage potential, as a basis for innovative disease management, modelling and forecasting. This includes practical aspects and the development of methods for disease diagnosis as well as infection bioassays.
Studies at the population, organism, physiological, biochemical and molecular genetic level are welcome. The journal scope comprises the pathology and epidemiology of plant diseases caused by microbial pathogens, viruses and nematodes.
Accepted papers should advance our conceptual knowledge of plant diseases, rather than presenting descriptive or screening data unrelated to phytopathological mechanisms or functions. Results from unrepeated experimental conditions or data with no or inappropriate statistical processing will not be considered. Authors are encouraged to look at past issues to ensure adherence to the standards of the journal.
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