Variations in mycelial growth and virulence below 26 °C among five Colletotrichum strains from strawberry
文献类型： 外文期刊
作者： Li, Xue 1 ; Geng, Chunnu 1 ; Huang, Xianyao 2 ; Chen, Siyu 2 ; Yang, Jing 2 ; Han, Yongchao 4 ; Lu, Fangyan 5 ; Duan, Ke 2 ; Gao, Qinghua 2 ;
作者机构： 1.Shanghai Inst Technol, Ecol Tech & Engn Coll, Shanghai 201418, Peoples R China
2.Shanghai Acad Agr Sci SAAS, Forestry & Fruit Tree Res Inst, Shanghai Key Lab Protected Hort Technol, Shanghai 201403, Peoples R China
3.Shanghai Normal Univ, Coll Life Sci, Shanghai Key Lab Plant Mol Sci, Shanghai 201418, Peoples R China
4.Hubei Acad Agr Sci, Inst Ind Crops, Wuhan 430064, Hubei, Peoples R China
5.Fengxian Dist Agr Technol Extens Ctr, Shanghai 201400, Peoples R China
关键词： Colletotrichum spp.; Temperature; Mycelial growth; Strawberry; Virulence
期刊名称：JOURNAL OF GENERAL PLANT PATHOLOGY （ 影响因子：1.0； 五年影响因子：1.2 ）
ISSN： 1345-2630
年卷期： 2024 年 90 卷 5 期
页码：
收录情况： SCI
摘要： Anthracnose caused by Colletotrichum spp. is a serious threat to many crops, and C. siamense has become increasingly prevalent worldwide. However, the mycelial growth and virulence of many of these species, especially below 26 degrees C, has largely remained unknown. Here, mycelial growth of five representative Colletotrichum strains (three C. siamense [Cs], one C. fructicola [Cf] and one C. gloeosporioides s.s. [Cg]) from diseased strawberry was measured at 10, 14, 18, 22 and 26 degrees C. Their virulence on Fragaria vesca and highly susceptible F. x ananassa cv. Benihoppe was tested at 14 degrees C and 22 degrees C. The strains did not differ much in mycelial growth between 10 and 26 degrees C, although growth of the Cs and Cg strains was somewhat faster than that of Cf. However, the strains varied greatly in their virulence on the two hosts. Strain Cs GQHZJ19, which grew fastest at 22 degrees C, was also the most virulent on both hosts at 14 degrees C and 22 degrees C. But growth rate of Cs was only positively correlated with virulence on susceptible cv. Benihoppe after 3 days at 22 degrees C. Based on the virulence analysis of the five Colletotrichum strains on hosts that vary in susceptibility at distinct temperatures, host genotype might play a decisive role in disease severity at an early stage, while temperature might influence the host-Colletotrichum spp. interaction at a later stage. More Colletotrichum strains (especially C. siamense) need to be tested to determine the mycelial growth and virulence in a wider temperature range and thus we can effectively manage disease.
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