JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2015, Vol. 39 ›› Issue (05): 1-6.doi: 10.3969/j.issn.1000-2006.2015.05.001

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Resistance responses of Castanea mollissima callus to Cp-toxin under Cryphonectria parasitica stress

HAN Shan1,2, ZHU Tianhui1,2*, QIAO Tianmin3, LI Shujiang1,2, WANG Ju2, ZHANG Boyang2   

  1. 1. College of Forestry,Sichuan Agricultural University,Ya'an 625014,China;
    2. Sichuan Provincial Key Laboratory of Forest Protection,Ya'an 625014,China;
    3. Sichuan Provincial Key Laboratory of Ecological Forestry Engineering for Upper Reach of Changjiang River,Ya'an 625014,China
  • Online:2015-10-15 Published:2015-10-15

Abstract: In order to clarify the resistance mechanism of different chestnut cultivars to Cp-toxin stress, effects of different concentrations of Cp-toxin from Cryphonectria parasitica on the activities of chitinase, β-1,3-glucanase, the contents of phytoalexin, free proline(Pro)of chestnut callus were analyzed.In this study, a significant correlation was observed between the treatment concentration and chestnut resistance. The results showed that the activities of enzymes increased notably when treated with the low concentrations of Cp-toxin(5-100 μg/mL). When treated with the high concentrations of Cp-toxin(>100 μg/mL),the activities of enzymes and the contents of phytoalexin decreased notably.These data suggested that resistant materials in different varieties increased significantly under the treatment with low concentration of Cp-toxin. This study also indicates that the chitinase, β-1,3-glucanase and phytoalexins were the inherent mechanism for resistance of chestnut callus to toxin stress, and change of free proline content was not an important factor related to the resistance.

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