Biological characteristics of Alternaria tenuis Nees on Dendrobium gratiosissimum Rchb. f.

doi:10.3969/j.issn.1004-1524.2017.11.12

›› 2017, Vol. 29 ›› Issue (11): 1862-1867.DOI: 10.3969/j.issn.1004-1524.2017.11.12

• Plant Protection • Previous Articles Next Articles

Biological characteristics of Alternaria tenuis Nees on Dendrobium gratiosissimum Rchb. f.

LIANG Linbo¹, WANG Shiyu², YANG Jianhua^{1, *}, ZHANG Yusi¹

1. Yangbi Hickory Research Institute, Yunnan Academy of Forestry, Yangbi 672500, China;
2. Ficulty of Landscape and Horticulture, Yunnan Agriculture University, Kunming 650201, China

Received:2017-05-12 Online:2017-11-20 Published:2017-12-05

Abstract

Abstract: Biological characteristics of Alternaria tenuis Nees on Dendrobium gratiosissimum Rchb. f. were studied. The results showed that temperature, pH, light, carbon source and nitrogen source affected the growth and sporulation of the fungus. The optimal growth temperature was 25 ℃, while Alternaria tenuis Nees almost could not grow at 40 ℃. The optimal pH was 5.0-6.0. The optimal light conditon for sporulation was 12 h lighting and 12 h dark circle in a day at 25 ℃; Sucrose, glucose, lactose and starch could be used as carbon sources at different level in PSA medium. So did the nitrogen sources. Colony diameter was the biggest when NH₄NO₃ was used as nitrogen source, while smallest when glycine was used as nitrogen source.

Key words: Dendrobium gratiosissimum Rchb. f., Alternaria tenuis Nees, pH, carbon source, nitrogen source, colony diameter

CLC Number:

S432.4⁺4

LIANG Linbo, WANG Shiyu, YANG Jianhua, ZHANG Yusi. Biological characteristics of Alternaria tenuis Nees on Dendrobium gratiosissimum Rchb. f.[J]. , 2017, 29(11): 1862-1867.

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Biological characteristics of Alternaria tenuis Nees on Dendrobium gratiosissimum Rchb. f.

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