Accumulation and Activity of Phytoalex ins in Cucumber Induced by Pathogen icity-imparired Strain of Cladosporium cucumernium

ACTA HORTICULTURAE SINICA ›› 2007, Vol. 34 ›› Issue (2): 361-365.

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Accumulation and Activity of Phytoalex ins in Cucumber Induced by Pathogen icity-imparired Strain of Cladosporium cucumernium

SHI Yan-xia^1*,GUAN Ai-min^1,2,and LI Bao-ju¹^**

(¹Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China; ²Department of Biology, Henan University, Kaifeng, Henan 456001, China)

Received:2006-12-18 Revised:2007-02-28 Online:2007-04-25 Published:2007-04-25
Contact: SHI Yan-xia; LI Bao-ju

Abstract

Abstract: Effect of resistance of cucumber against Cladosporium cucumernium was induced by pathogenicity-impaired strains (PIS) 2-2A₂. The toxicity of extracted compounds to C.cucumernium was carried out successively by bioassay, thin-layer chromatograms ( TLC ) and high performance liquid chromatography (HPLC). The results showed that the effective ingredients were flavonoid phytoalexins and they could be induced by PIS 2-2A₂ in cucumber leaves.

Key words: Cucumber, Pathogenicity2impaired strain, Induced resistance, Phytoalexins

CLC Number:

S 642.2

SHI Yan-xia;GUAN Ai-min;and LI Bao-ju. Accumulation and Activity of Phytoalex ins in Cucumber Induced by Pathogen icity-imparired Strain of Cladosporium cucumernium[J]. ACTA HORTICULTURAE SINICA, 2007, 34(2): 361-365.

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Accumulation and Activity of Phytoalex ins in Cucumber Induced by Pathogen icity-imparired Strain of Cladosporium cucumernium

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