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Relationship between the contents of nutrients and chlorophylls in leaves of different grape varieties and their resistance to Apolygus lucorum(Hemiptera:Miridae)
Author(s): 
Pages: 570-575
Year: Issue:  5
Journal: Acta Entomologica Sinica

Keyword:  Apolygus lucorumgrapeinsect resistancenutrientsoluble proteinsoluble sugarchlorophyll;
Abstract: 【Aim】Studying the resistance of grape varieties is very important for developing the integrated pest management of the green plant bug,Apolygus lucorum.In this study,the resistance levels of different grape varieties were identified,and the relationship between the contents of soluble proteins,soluble sugars and chlorophylls in grape leaves and their resistance to A.lucorum was analyzed,so as to explore the resistance mechanism of different grape varieties to A.lucorum.【Methods】The resistance levels of nine grape varieties(Kyoho,Muscat Hamburg,Red Globe,Ruby,Fujiminori,Cabernet Sauvignon,Cabernet Gernischt,Chardonnay and Cabernet Franc) were tested in the field for three consecutive years,the contents of soluble proteins,soluble sugars and chlorophylls in grape leaves were determined with the coomassie brilliant blue method,anthrone colorimetry method and ethanol extraction method,respectively,and the relationships between the contents of these substances and their resistance to A.lucorum were analyzed with linear regression method.【Results】The resistance levels of different grape varieties to A.lucorum were obviously different.The resistance indices of the varieties Red Globe,Muscat Hamburg,Kyoho,Cabernet Sauvignon,Cabernet Franc,Ruby,Cabernet Gernischt,Fujiminoriand Chardonnay increased sequentially.The contents of soluble proteins,soluble sugars and chlorophylls in different grape varieties were different.Correlation analysis showed that the contents of soluble proteins and chlorophylls in grape leaves had no correlation with the resistance index,while the content of soluble sugars had a significantly negative linear correlation with the resistance index(P<0.05).【Conclusion】Different grape varieties show different resistance levels to A.lucorum.Fujiminori and Chardonnay have high resistance to A.lucorum,while Red Globe,Muscat Hamburg and Kyoho have low resistance to A.lucorum.This difference of resistance to A.lucorum may be related to the content of soluble sugars in grape leaves.
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