Allelopathic Effects of the Root Exudates in the Watermelon and Rootstocks on Fusarium oxysporum f.sp.niveum

doi:10.7668/hbnxb.2010.06.030

Abstract

Abstract: To understand disease-resistant mechanism of the rootstock, the root exudates in two rootstocks RBNG, YSXG and watermelon CTHL were collected and their effects on Fusarium oxysporum f.sD.niveum were tested.The re. suits indicated that the root exudates in two rootstocks had stronger inhibitory activity to spore germinations and mycelial growths than that in watermelon；Three kinds of root exudates could enhance the content of MDA in the mycelium, SOD activities.POD activities and soluble protein descended treated with the root exudates in the rootstocks and wa. termelon.But the decreased radio of the fornler was lager than the latter.Besides.the content of soluble sugar in the mycelium decreased treated with the root exudates in the rootstocks and submited the tendency of drop first and in. creased again treated with the root exudates in the watermelon.

Key words: Watermelon, Rootstock, Root exudate, Fusarium oxysporum f.sp.niveum, Allelopathic effect

CLC Number:

S436.5

GUO Shang, ZHANG Zuo-gang, TIAN Yong-qiang, WANG Jian-ming, YAO Yan-ping. Allelopathic Effects of the Root Exudates in the Watermelon and Rootstocks on Fusarium oxysporum f.sp.niveum[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2010, 25(6): 160-163. doi: 10.7668/hbnxb.2010.06.030.

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