TITLE:
The Effect of Exogenous Phytohormones on Resistance of Wheat Calluses to Tilletia caries (D.C.) Tul. & C. Tul.
AUTHORS:
Igor V. Maksimov, Liubov G. Yarullina, Olga B. Surina
KEYWORDS:
Wheat, Calluses, Tilletia caries, Indole-3-Acetic Acid (IAA), Abscisic Acid (ABA), Cytokinins, Defense, Oxalate Oxidase
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.5 No.12,
May
27,
2014
ABSTRACT: The influence of
exogenic hormones (indole-3-acetic acid (IAA), abscisic
acid (ABA) and kinetin) on defense reaction of wheat (Triticum aestivum L.) calli
to the bunt agent Tilletia caries (D.C.) Tul. & C. Tul. was studied.
ABA and kinetin induced the oxalate oxidase activity, increased the Н2О2 level, decreased germination of fungi teliospores and induced on calli the
occurrence of dense sites non-infected by pathogen. On the contrary, IAA led to
the decrease of oxalate oxidase activity, loosening of calli and increase
germination of bunt agent teliospores and growth of fungi mycelium, besides
stimulated rhizoids formation of wheat calli. Probably, the accumulation of Н2О2 in wheat calli under the influence of kinetin and ABA connected with activity
of oxalate oxidase is one of the factors increasing defense reaction of wheat
to bunt agent.