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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.
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National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2017)
[Effective from January 1, 2017]
For more details click here

ICV 2015: 85.95
Index Copernicus ICI Journals Master List 2015 - IJCMAS--ICV 2015: 85.95
For more details click here
journals IJCMAS
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Original Research Articles

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 2015: 85.95
NAAS RATING 2017: 5.38

Int.J.Curr.Microbiol.App.Sci.2017.6(4): 1931-1939
DOI: https://doi.org/10.20546/ijcmas.2017.604.230


Effect of Temperature on Rice Blast Infection Process with Emphasis on Appressoria Formation by Magnaporthe oryzae
Laxman Singh Rajput, Taru Sharma, Puchakayala Madhusudhan and Parimal Sinha*
Division of Plant Pathology, ICAR-Indian Agricultural Research Institute, New Delhi-110012, India
*Corresponding author
Abstract:

Conidial germination, appressoria formation and penetration are most important stages of infection process in rice blast pathogen i.e. Magnaporthe oryzae, and temperature rise due to climate change is expected to change infection process of pathogen. Temperature has significant influenced on all components of infection process i.e. conidial germination, appressoria formation, germ tube growth. All the components of infection process are higher at optimal temperature (27°C) as compared to both suboptimal (22°C) and supra-optimal (32°C) temperatures for M. oryzae. Appressoria formation and spore germination are faster in optimal temperature and too slower at supra-optimal temperature, which is an indirect indication that M. oryzae is not capable to cause infection at higher temperature. Interestingly, change in temperature from sub optimal to optimal temperature has not affected rates of conidial germination and rate of appressoria formation. Similar kind of trend observes for germ tube growth, and after appressoria formation re-growth is observed, which is an indication of diauxic growth in M. oryzae. This is the first report that only 4 to 5 percent of appressoria are available to cause infection in natural condition. Dynamics of appressoria and spore germination helps in understanding of infection process and development of new management strategies for rice blast.


Keywords: Appressoria, Conidia, Germination, Magnaporthe oryzae, TemperatureAppressoria, Conidia, Germination, Magnaporthe oryzae, Temperature
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How to cite this article:

Laxman Singh Rajput, Taru Sharma, Puchakayala Madhusudhan and Parimal Sinha. 2017. Effect of Temperature on Rice Blast Infection Process with Emphasis on Appressoria Formation by Magnaporthe oryzae.Int.J.Curr.Microbiol.App.Sci. 6(4): 1931-1939. doi: https://doi.org/10.20546/ijcmas.2017.604.230