Biology and epidemiology of Tilletia indica inducing Karnal bunt (partial bunt) of wheat (Triticum aestivum) in arid regions


354 / 237

Authors

  • BAHRAM MANSOORI

Keywords:

Karnal bunt, monokaryotic life cycle, soil-borne plant pathogen, Tilletia indica, wheat diseases

Abstract

Wheat (Triticum aestivum L.) fields were surveyed during April-May 2007, 2008, 2012 and 2013, to see the incidence of Karnal bunt of wheat (Kb) caused by Tilletia indica in south of Iran. The assessments of disease indicated that there were no teliospores in soils. The experiments were conducted to investigate a substitute for teliospore which survive and produce secondary sporidia. In vitro teliospores on water agar, a type of tiny translucent spores, were seen to reproduce by budding on lids of Petri-dishes several weeks after germination. Floccose colonies producing allantoids sporidia were initiated after mounting the lids over fresh potato dextrose agar medium. On dehydrated colonies of fungus initiated from teliospores on water agar, kept for a period of 2 years at dry condition (10-14% RH; 10-45°C), small radiated colonies were seen to be formed producing secondary sporidia under humidity provided from a piece of moistened cotton wool. Similar tiny spores were captured on slides used as trap mounted over the samples of teliospores free soils under humid conditions. While a number of tiny spores germinated into colonies producing secondary sporidia, numerous secondary sporidia were also seen on the traps among tiny spores which seemed to be released and deposited on slides from soil. Thus, results indicated that wheat fields have been infested through decades by a moiety of T. indica; so called minisporidia, providing secondary sporidia to initiate disease at favorite conditions in south of Iran.

Downloads

Issue

Vol. 68 No. 1 (2015): Indian Phytopathology

Section

Research Articles

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.

How to Cite

MANSOORI, B. (2015). Biology and epidemiology of Tilletia indica inducing Karnal bunt (partial bunt) of wheat (Triticum aestivum) in arid regions. Indian Phytopathology, 68(1), 39-41. https://epubs.icar.org.in/index.php/IPPJ/article/view/46969