Pycnidiospore germination of Ascochyta rabiei, causal agent of chickpea blight, was significantly enhanced in low concentrations of malic acid (0.005 and 0.01%) but it was severely retarded at higher concentrations (1.5 and 2.0%). The total organic acids


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Authors

  • C. USHAMALINI, K. RAJAPPAN and KOUSALYA GANGADHARAN Department of Plant Pathology, Tamil Nadu Agricultural University, Coimbatore 641 003

Keywords:

Cowpea, seed borne fungi, biochemical constituents

Abstract

The effect of seed-borne fungi of cowpea (Macrophomina phaseolina, Fusarium oxysporum f.sp. tracheiphilum, Aspergillus flavus and A. niger), on the biochemical constituents (total sugars, reducing sugars, non-reducing sugars and protein) of stored seeds was studied. The maximum reduction in total sugars, reducing sugars and non-reducing sugars was recorded in seeds inoculated with F. oxysporum f.sp. tracheiphilum. After 30 days storage, the total sugar content of seeds inoculated with F. oxysporumf.sp. tracheiphilum, M. phaseolina, A. flavus and A. niger was 12.2, 12.4, 13.7 and 13.3 mg/g, respectively, compared with 16.2 mg/g in the control. The protein content was drastically reduced by M. phaseolina infection. The reduction in protein contentdue to F. oxysporum f.sp. tracheiphilum, A. niger and A. flavus infection was also significant. There was a negative correlation between storage period and sugar and protein content.

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Issue

Vol. 51 No. 3 (1998): Indian Phytopathology

Section

Research Articles

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How to Cite

and KOUSALYA GANGADHARAN, C. U. K. R. (2002). Pycnidiospore germination of Ascochyta rabiei, causal agent of chickpea blight, was significantly enhanced in low concentrations of malic acid (0.005 and 0.01%) but it was severely retarded at higher concentrations (1.5 and 2.0%). The total organic acids. Indian Phytopathology, 51(3), 258-260. https://epubs.icar.org.in/index.php/IPPJ/article/view/19674