Morphological, pathogenic and genetic variability amongst sorghum isolates of Colletotrichum graminicoia from India
258 / 164
Authors
-
J. LATHA, KUSUM MATHUR, P.K. MUKHERJEE A. CHAKRABARTI, V.P. RA0 and R.P. THAKUR
Keywords:
Colletotrichum graminicola, sorghum, pathogenic variability, virulence, RAPDAbstract
Summer weather conditions affected the viability of telial inoculum and further diurnal variations in temperature and RH affected the viability of infective secondary sporidia during wheat crop season. Germination of teliospores placed in the rhizosphere of Pennisetum and Sorghum sp., was reduced by 15.5 and 17.1%, while it improved in the rhizosphere of cucurbits, rice and cotton (27, 22 and 9% respectively) as compared to check buried in the fallow soil. Rhizosphere soil extracts of the same crops were inhibitory to teliospore germination, except that of rice and cucurbits. The off season flodding affected the teliospore germination insignificantly but exposure to sun improved it significantly. The germination of teliospores taken from the intact bunt balls in the various treatments was significantly more as compared to the ones incubated as loose mass. The teliospores of the previous season started germinating with the onset of the wheat crop season and the percent germination further improved. Secondary allantoid sporidia (SAS), were produced in diurnal periodicity. Mid-day and afternoon conditions exerted maximum stress on their formation, germination and survival. Extent of dehydration was measured as percentage of coiled sporidia, which reflected the amount of stress in the environment. This stress was partly mitigated if coiled SAS were shifted to saturated atmosphere.
Downloads
Submitted
Published
Issue
Section
License
For Authors
As soon as an article is accepted for publication, authors are requested to assign copyright of the article (or to grant exclusive publication and dissemination rights) to the publisher (Indian Phytopathlogical Society). This will ensure the widest possible protection and dissemination of information.
For Readers
While the advice and information in this journal is believed to be true and accurate at the date of its publication, the authors, the editors, nor the publisher can accept any legal responsibility for any errors or omissions that may have been made. The publisher makes no warranty, express or implied, with respect to the material contained herein.
All articles published in this journal are protected by copyright, which covers the exclusive rights to reproduce and distribute the article (e.g., as offprints), as well as all translation rights. No material published in this journal may be reproduced photographically or stored on microfilm, in electronic data bases, on video disks, etc., without first obtaining written permission from the publisher. The use of general descriptive names, trade names, trademarks, etc. in this publication, even if not specifically identified, implies that these names are protected by the relevant laws and regulations.