一种引起虎皮兰叶斑病的刺孢壳属真菌的生物学特性

doi:10.11707/j.1001-7488.20150816

Abstract

Abstract:

[Objective] This study aims at evaluating the effects of environmental factors and susceptibility of various plant species to pathogens causing Sansevieria leaf spot disease for developing the control methods and strategies. [Method] We investigated the biological characteristics of the HPL06 isolate of Chaetomella sp. that causes leaf spot on Sansevieria trifasciata Prain cv. ‘Hanii’ in China. The fungus was incubated in different conditions (i.e. light environments, temperature, pH, nitrogen and carbon sources). Colony diameters were measured using the CM method. The optimal environmental factors for the fungal growth were analyzed. A host spectrum of the isolate was also investigated on 62 plant species covering 23 families using a detached leaf inoculation technique. [Result] Results showed that the optimal illumination and temperature for hyphal growth were 24 h of fluorescent light and 25-30℃, respectively. The pathogen could grow at pH 4-11, but the optimal pH was 4. The optimal carbon and nitrogen sources were glucose and asparagine, respectively, and the hyphae exhibited optimal growth on PDA plates. A total of 46 species belonging to 20 families were susceptible to Chaetomella sp. HPL06. [Conclusion] The isolate could adapt to various environments. The fungus could not grow below 10℃, or above 40℃. Chaetomella sp. HPL06 can cause diseases in many plants. A number of plants were found to be susceptible to Chaetomella sp. with 74.19% of the total number of the tested 62 plant species. A large number of plants susceptible to Chaetomella sp. HPL06 may exist in nature. In order to avoid even greater economic losses caused by the fungus, further field studies on the occurrence of the new Sansevieria leaf spot disease are needed to establish a science-based disease management strategy.

Key words: Sansevieria trifasciata, Chaetomella, biological characteristics

CLC Number:

S718.81

Li Yongli, Zhou Zhou, Lou Jinfeng, Hu Yajing, Shi Miaojun. Biological Characteristics of Chaetomella sp.(Sphaeropsidaceae), A Novel Causal Agent of Sansevieria Leaf Spot Disease[J]. Scientia Silvae Sinicae, 2015, 51(8): 121-126.

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Biological Characteristics of Chaetomella sp.(Sphaeropsidaceae), A Novel Causal Agent of Sansevieria Leaf Spot Disease

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