Follow
International Journal of Current Microbiology and Applied Sciences (IJCMAS)
IJCMAS is now DOI (CrossRef) registered Research Journal. The DOIs are assigned to all published IJCMAS Articles.
Index Copernicus ICI Journals Master List 2023 - IJCMAS--ICV 2023: 95.56 For more details click here
National Academy of Agricultural Sciences (NAAS) : NAAS Score: *5.38 (2020) [Effective from January 1, 2020] For more details click here

Login as a Reviewer


See Guidelines to Authors
Current Issues
Download Publication Certificate

Original Research Articles                      Volume : 14, Issue:7, July, 2025

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

Int.J.Curr.Microbiol.App.Sci.2025.14(7): 39-48
DOI: https://doi.org/10.20546/ijcmas.2025.1407.005


Variations in Morphology and Growth Pattern of Bipolaris cynodontis Isolates
Beena Gore and S. Shishupala*
Department of Microbiology, Davangere University, Shivagangotri campus, Davangere-577007, Karnataka, India
*Corresponding author
Abstract:

Phenotypic variations among fungal species provide important insights into the existence of distinct races or strains in fungi. Bipolaris cynodontis isolates from Bermuda grass and sugarcane were evaluated for their growth rate, colony morphology and conidial characteristics on different culture media. Isolates were divided into four different groups based on colour and growth pattern. Growth rate among different isolates varied in the same medium indicating aggressiveness of the isolate. At the same time growth pattern and colony morphology differentiated greatly among the isolates. Growth and colony morphology was also influenced by the nutrients in the media. Significant differences in the conidial shape, size and number of septa provided additional parameters to differentiate isolates. These morphological differences may be due to parasexuality among naturally occurring isolates of B. cynodontis. The results indicate importance of growth pattern to assess variability in B. cynodontis, providing opportunity to understand fungal biodiversity with implications in agriculture.


Keywords: Colony morphology, growth rate, conidia, variability, Bipolaris


References:

Aggarwal, R., Singh, V. B., Gurjar, M. S., Gupta, S., and Srinivas, P. (2009). Intraspecific variations in Indian isolates of Bipolaris sorokiniana infecting wheat based on morphological, pathogenic and molecular characters. Indian Phytopathology 62:449-460. https://epubs.icar.org.in/index.php/IPPJ/article/view/12636

Aryani, D.C., Den Besten, H.M.W., Hazeleger, W.C. and Zwietering, M.H. (2015). Quantifying strain variability in modelling growth of Listeria monocytogenes. International Journal of Food Microbiology 208:19-29 http://dx.doi.org/10.1016/j.ijfoodmicro.2015.05.006

Bhunjun, C. S., Dong, Y., Jayawardena, R. S., Jeewon, R., Phukhamsakda, C., Bundhun, D., Hyde, K.D., and Sheng, J. (2020). A polyphasic approach to delineate species in Bipolaris. Fungal Diversity 102:225-256. http://dx.doi.org/10.1007/s13225-020-00446-6

Burdon, J. J., and Silk, J. (1997). Sources and patterns of diversity in plant-pathogenic fungi. Phytopathology 87:664-669. https://doi.org/10.1094/PHYTO.1997.87.7.664

Chand, R., Pandey, S. P., Singh, H. V., Kumar, S., Joshi, A. K. (2003). Variability and its probable cause in natural populations of spot blotch pathogen Bipolaris sorokiniana of wheat (T. aestivum L.) in India. Journal of Plant Diseases and Protection 110:27-35. https://www.jstor.org/stable/43226868

Deacon, J.W. (2005). Fungal Biology. John Wiley & Sons 371 pp.

Farias, C. R. J. D., Afonso, A. P. S., Pierobom, C. R. and Del Ponte, E. M. (2011). Regional survey and identification of Bipolaris spp. associated with rice seeds in Rio Grande do Sul State, Brazil. Ciência Rural 41:369-372. https://doi.org/10.1590/S0103-84782011000300001 

Gautam, A. K., Verma, R. K., Avasthi, S., Sushma, Bohra, Y., Devadatha, B., Niranjan, M., and Suwannarach, N. (2022). Current insight into traditional and modern methods in fungal diversity estimates. Journal of Fungi 8:226- 275 https://doi.org/10.3390/jof8030226

Goh, T. K. (1999). Single-spore isolation using a hand-made glass needle. Fungal Diversity 2:47-63.

Jaiswal, S. K., Sweta, L. C. Prasad, S. Sharma, S. Kumar, R. Prasad, S. P. Pandey, R. Chand, and A. K. Joshi. (2007). Identification of molecular marker and aggressiveness for different groups of Bipolaris sorokiniana isolates causing spot blotch disease in wheat (Triticum aestivum L.). Current Microbiology 55:135-141 https://doi.org/10.1007/s00284-007-0035-z

Janowski, D. and Leski, T. (2023). Methods for identifying and measuring the diversity of ectomycorrhizal fungi. Forestry: An International Journal of Forest Research 96:639-652 https://doi.org/10.1093/forestry/cpad017

Manamgoda, D. S., Rossman, A. Y., Castlebury, L. A., Crous, P. W., Madrid, H., Chukeatirote, E., and Hyde, K. D. (2014). The genus Bipolaris. Studies in Mycology 79:221-288. https://doi.org/10.1016/j.simyco.2014.10.002  

Narayanasamy, P. and Narayanasamy, P. (2011). Assessment of variability in fungal plant pathogens. Microbial Plant Pathogens-Detection and Disease Diagnosis: Fungal Pathogens, January 2010, pp 245-272, Vol.1.  https://doi.org/10.1007/978-90-481-9735-4_4 

Pandey, S. P., Sharma, S., Chand, R., Shahi, P., and Joshi, A. K. (2008). Clonal variability and its relevance in generation of new pathotypes in the spot blotch pathogen, Bipolaris sorokiniana. Current Microbiology 56:33-41. https://doi.org/10.1007/s00284-007-9034-3  

Poloni, A., Pessi, I. S., Frazzon, A. P. G., and Van Der Sand, S. T. (2009). Morphology, physiology, and virulence of Bipolaris sorokiniana isolates. Current Microbiology 59:267-273 https://doi.org/10.1007/s00284-009-9429-4  

Sharmin, A., F. M. Aminuzzaman, T. H. Ansari, and M. Ahmed. (2022). Morphological, cultural, molecular and pathogenic variation of Bipolaris sorokiniana in wheat. American Journal of Molecular Biology 12:190-202. https://doi.org/10.4236/ajmb.2022.124016

Sivanesan, A. (1987). Graminicolous species of Bipolaris, Curvularia, Drechslera, Exserohilum and their teleomorphs. Mycological Papers 158:1–261.

Tinline, R D. (1962). Cochliobolus sativus: V. heterokaryosis and parasexuality. Canadian Journal of Botany, 40:425-437. https://doi.org/10.1139/b62-043

Download this article as Download

How to cite this article:

Beena Gore and Shishupala, S. 2025. Variations in Morphology and Growth Pattern of Bipolaris cynodontis Isolates.Int.J.Curr.Microbiol.App.Sci. 14(7): 39-48. doi: https://doi.org/10.20546/ijcmas.2025.1407.005
Copyright: This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike license.

Citations