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首页> 外文期刊>Mycologia >Botrytis fabiopsis, a new species causing chocolate spot of broad bean in central China
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Botrytis fabiopsis, a new species causing chocolate spot of broad bean in central China

机译：Botrytis fabiopsis，导致华中蚕豆巧克力斑点的新物种

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摘要

The current study was conducted to identify Botrytis spp. isolated from symptomatic broad bean plants grown in Hubei Province, China. Among 184 Botrytis strains, three distinct species, B. cinerea, B. fabae and a previously undescribed Botrytis sp., were identified based on morphology of colonies, sclerotia and conidia. The novel Botrytis sp. is described herein as a new species, Botrytis fabiopsis sp. nov. At 20 C B. fabiopsis grew on potato dextrose agar (PDA) at 12-13 mm similar to B. fabae (13 mm d(-1)), but slower than B. cinerea (17-19 mm It formed pale gray colonies with short aerial mycelia and produced gray to black sclerotia in concentric rings on PDA. B. fabiopsis produced greater numbers of sclerotia than B. cinerea but fewer than B. fabae. Conidia produced by B. fabiopsis on broad bean leaves are hyaline to pale brown, elliptical to ovoid, wrinkled on the surface and are larger than conidia of B. fabae and B. cinerea. Phylogenetic analysis based on combined DNA sequence data of three nuclear genes (G3PDH, HSP60 and RPB2) showed that B. fabiopsis is closely related to B. galanthina, the causal agent of gray mold disease of Galanthus sp., but distantly related to B. fabae and B. cinema. Sequence analysis of genes encoding necrosis and ethylene-inducing proteins (NEPs) indicated that B. fabiopsis is distinct from B. galanthina. Inoculation of broad bean leaves with conidia of B. fabiopsis caused typical chocolate spot symptoms with a similar disease severity to that caused by B. fabae but significantly greater than that caused by B. cinerea. This study suggests that B. fabiopsis is a new causal agent for chocolate spot of broad bean.
机译：进行了当前的研究以鉴定葡萄孢属。分离自中国湖北省有症状蚕豆植物。根据菌落，菌核和分生孢子的形态，在184株葡萄孢属菌株中，发现了三个不同的种：灰葡萄孢杆菌，法氏杆菌和以前未描述的葡萄孢菌。小说Botrytis sp。在本文中被描述为新种，Botrytis fabiopsis sp。十一月在20 C时，紫菜双歧杆菌在马铃薯葡萄糖琼脂（PDA）上的生长速度为12-13毫米，与Fab。fabae（13毫米d（-1））相似，但比灰霉菌（17. 19毫米）慢。气生菌丝短，在PDA上的同心环上产生灰色至黑色的菌核;烟粉虱产生的菌核数量比灰葡萄孢菌要多，但比Fab。少。椭圆形到卵形，在表面起皱，并且比Fab。cineae和灰葡萄孢的分生孢子大，根据三个核基因（G3PDH，HSP60和RPB2）的DNA序列数据进行的系统发育分析表明，B。fabiopsis密切相关甘蓝霉菌的灰霉病的病原体B. galanthina，但与Fab。fabae和B. Cinema密切相关，编码坏死和乙烯诱导蛋白（NEPs）的基因的序列分析表明，B。fabiopsis有区别B. galanthina的种子。用B的分生孢子接种蚕豆叶。 fabiopsis导致典型的巧克力斑点症状，其病情严重程度与由Fab。fabae引起的相似，但明显大于由B. cinerea引起的。这项研究表明，双歧杆菌是蚕豆巧克力斑点的新病因。

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