Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2015, Vol. 31 ›› Issue (34): 177-186.doi: 10.11924/j.issn.1000-6850.casb15050148

Special Issue: 园艺

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Change of Disease Related Substances Content in Branches During the Process of Valsa ceratosperma.

Liu Fei, Tan Yi, Wang Yi, Wu Ting, Zhang Xinzhong   

  1. (College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193)
  • Received:2015-05-25 Revised:2015-08-05 Accepted:2015-08-25 Online:2015-12-17 Published:2015-12-17

Abstract: To elucidate the physiological mechanism of the resistance to apple canker, one-year-old apple branches of the moderately resistant accessions ‘French 8’ and ‘Gao 5’, the susceptible cultivars ‘Whitney’ and ‘Red Fuji’ and highly susceptible cultivars ‘Gala’ and ‘Golden delicious’ were inoculated in vitro with mycelia of Valsa ceratosperma isolate 03-8. Zero to seven days after the inoculation, the changes in polyphenols, salicylic acid and lignin were detected. The results indicated that 0-7 days after inoculation, p-coumaric acid, cinnamic acid and chlorogenic acid increased significantly, but only the content of chlorogenic acid was negatively correlated with Valsa canker lesion length (r=-0.906). After inoculation with mycelia, salicylic acid and lignin contents in the cortical tissue significantly increased, the content of salicylic acid and lignin was significantly and negatively correlated with Valsa canker lesion length (r=-0.825; r=-0.948). Therefore, the increase of salicylic acid, lignin and chlorogenic acid in apple was correlated with the resistance to Valsa ceratosperma.

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