International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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Original Research Articles                      Volume : 6, Issue:10, October, 2017

PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
Publisher : Excellent Publishers
Email : /
Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2018: 95.39
NAAS RATING 2020: 5.38

Int.J.Curr.Microbiol.App.Sci.2017.6(10): 3244-3250

Morpho-Physiological Variability in Alternaria carthami Chowdhury Causing Safflower Leaf Spot
M.R. Madhu1*, M.P. Basavarajappa2, I.D. Anand1 and Chidanand Lokapur1
1Department of Plant Pathology, University of Agricultural sciences,Dharwad-580 005, Karnataka, India
2University of Horticultural Sciences, Bagalkot-587 104, Karnataka, India
*Corresponding author

Twelve isolates of Alternaria carthami collected from major safflower growing parts of Northern Karnataka differed significantly with respect to Cultural, morphological and physiological variation. Among different tested media, host leaf extract recorded significantly higher (87.19 mm) radial growth followed by Czapeck’s dox agar (81.92 mm) and Potato dextrose agar (81.25 mm). The conidia of different isolates shown variation with vertical (0-4) and horizontal (6-9) septum and also size varies from 29.6– 84.4 x 9.1 –16.3 μm to 50.3-101.3 x 10.2-24.3 μm. The fungus under sturdy grew best at temperature of 250 C recorded 290.18 mg dry mycelial weight whereas, optimum range was between 25-300 C. Similarly the pH ranges from 6.0-7.0 was optimum for good growth and development of A. carthami. The highest dry mycelial weight (331.50 mg) of the fungus was recorded with of pH 7.0 followed by pH 6.0 (278.77 mg) and pH 5.0 (236.38 mg) and the least dry mycelial weight of 145.66 mg was recorded with pH 9.

Keywords: Alternaria carthami, Safflower, Variability, temperature, pH.

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How to cite this article:

Madhu, M.R., M.P. Basavarajappa, I.D. Anand and Chidanand Lokapur. 2017. Morpho-Physiological Variability in Alternaria carthami Chowdhury Causing Safflower Leaf Spot.Int.J.Curr.Microbiol.App.Sci. 6(10): 3244-3250. doi:
Copyright: This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike license.