The Effect of Nutritional and Environmental Factors on Hyphal Growth and Sporulation of Helminthosporium sativum

doi:10.3321/j.issn:1000-7091.1990.03.019

Abstract

Abstract: The experimental results showed that the optimum conditions for hyphal growth of Helmenthospcrium sativum(Cochliobolus,saticus) were monosaccharide or bisaccharide (as carbon source) 2 NH4 +-state nitrogen (as nitrogen source) and KH₂PO₄ (as mineral nutrition), the optimum acidity and temperature for pathogen growth were pH 6.0 and 30℃ respectively- and alternatively illuminating culture was necessary. The optimum conditions for sporulation were polysaccharide (as carbon source), FeSO₄·7H₂O (as mineral nutrition) and other environmental factors. pH 6.0,20-25℃ and dark culturing. The effect of nitrogen source on the sporulation was complex. The extracts of wheat leaves and potatoes were advantageous net only to hyphal growth but to sporulation. The optimum condition: for hyphal growth was negatively correlated with the conditions for sporulation.

Key words: Wheat, Helminthosporium, selivum (Cochliobolus Biological characteristics

Kang Shaolan, Peng Rongxin, Huang Wufang, Dong Jingao. The Effect of Nutritional and Environmental Factors on Hyphal Growth and Sporulation of Helminthosporium sativum[J]. ACTA AGRICULTURAE BOREALI-SINICA, 1990, 5(3): 100-103. doi: 10.3321/j.issn:1000-7091.1990.03.019.

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