Link to home

Cannot retrieve the URL specified in the Content Link property. For more assistance, contact your site administrator.

The effect of volatile organic compounds produced by Ceratocystis fimbriata on the growth of soilborne Rhizoctonia solani and rice seed germination.
Q. LI (1), Q. J. Li (1). (1) China Agricultural University, Beijing, Peoples Republic of China

<i>Ceratocystis fimbriata</i>, which produces volatile organic compounds (VOCs) during the cultivation on medium, is a widely distributed fungus in field soil and seriously causes kinds of plant diseases. The bioassay of <i>C. fimbriata</i> on the growth of soil-borne fungi and germination of crop seed is a key point for verifying the multi-action of this VOCs-fungus in soil ecosystem. Ten components of the compounds have been identified by headspace GC-MS method. The effect of the VOCs on the growing of soil-borne <i>Rhizoctonia solani</i> and rice seed germination was investigated. By means of vertical dual test in vitro without physical contact or diffusion through the culture medium, it indicated that mycelium growth of <i>R. solani</i> was strongly inhibited by VOCs generated from <i>C. fimbriata</i>, with the inhibitory rate of 82 %. The fumigated mycelium appeared thin, malformed, and even lost the ability of sclerotinia formation. The inoculated <i>R. solani</i> on rice seeds was completely controlled seven days after fumigation by six-day-cultured <i>C. fimbriata</i>. Remarkably, germination of rice seeds was also influenced by VOCs generated from <i>C. fimbriata.</i> These preliminary results pointed out clearly that VOCs<i>-C. fimbirata</i> possess both inhibition on soil-borne <i>R. solani</i> and rice seed germination.<p><p>Keywords: Fungus, Cereals-Grains, Rice

View Presentation