Archives of Phytopathology and Plant Protection (2010) 43, 1407-1422

A. Kandan, R. Radja Commare, R. Nandakumar, G. Amutha, A. Vijayasamundeeswari, A. Ramanathan, T. Raguchander, P. Balasubramanian and R. Samiyappan (2010)
Rapid suppression of defence enzymes and compounds by sheath blight (Rhizoctonia solani) and sheath rot (Sarocladium oryzae) toxins in rice cell suspension cultures
Archives of Phytopathology and Plant Protection 43 (14), 1407-1422
Abstract: To understand the suppression mechanisms against disease resistance in rice, we took advantage of the fact that suspension cultured cells exhibit many of the defence responses that are characteristic of intact tissues. In this study we constitutively measured the Rhizoctonia solani and Sarocladium oryzae toxins, induced and suppressed levels of phenylalanine ammonia lyase, peroxidase, superoxide dismutase, phenols, catalase, ß-1,3-glucanase and chitinase in rice suspension cultured cells. The addition of Rhizoctonia solani and Sarocladium oryzae toxins separately in suspension cultured cells shows the suppression of defence enzymes and compounds at 24 h and 48 h respectively except SOD. The rice cultivar IR50 delays the disease suppression effect when compared to the other cultivars viz., Pusa Basmati and Co 43. The PR proteins (namely ß-1,3-glucanase and chitinase) activities in rice suspension cultured cells were reduced during 48 h and 72 h after the addition of Rhizoctonia solani toxin, whereas the activities were suppressed only after 72 h when inoculated with Sarocladium oryzae toxin. Selective suppression of these defence enzymes and compounds by Rhizoctonia solani and Sarocladium oryzae toxin shows that toxins play a major role during pathogenesis in rice cells.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website

Research topic(s) for pests/diseases/weeds:
molecular biology - genes
resistance/tolerance/defence of host

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Rhizoctonia solani
	Sarocladium oryzae