Biological characteristics of the Angelica sinensis anthracnose causal agent, Colletotrichum dematium

doi:10.11686/cyxb2016295

Abstract

Abstract: The biological characteristics and substrate requirements of Colletotrichum dematium were studied using traditional culture techniques to provide a basis for understanding the occurrence of outbreaks of Angelica sinensis anthracnose. It was found that the temperature range over which mycelium growth and conidial germination of C. dematium occurred was from 10 ℃ to 35 ℃, with an optimum temperature of 25 ℃. Mycelium growth occurred from pH 5 to pH 12, and the optimum pH value was 11. Conidia were produced from pH 8 to pH 11, and the optimum pH value for conidia production was 10, while the optimum for conidial germination was pH 7. The mycelium of C. dematium grew best on media with more abundant carbon and nitrogen supply, but were inhibited by mannitol, D-galactose and chloralose. Mycelium growth and conidial germination were not sensitive to light. Conidia required a relative humidity of 95% or more for germination, and liquid water was the most suitable medium for conidial germination (P<0.05). Sucrose solution promoted conidial germination, but potato solution inhibited germination.

YANG Cheng-De, BIAN Jing, CHEN Tai-Xiang, CHEN Xiu-Rong, WANG Han-Qi, YANG Xiao-Li, WANG Yang. Biological characteristics of the Angelica sinensis anthracnose causal agent, Colletotrichum dematium[J]. Acta Prataculturae Sinica, 2017, 26(6): 139-144.

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