Role of cell wall degrading enzymes in the interaction of poplar and Melampsora larici-populina Kleb.

Abstract

The activity of cell wall-degrading enzymes, produced in poplar cultivars infected Melampsora larici-populina Kleb., was studied. The results show that PMG, PMTE, C_X and β-glucosidase played roles during the infection. After inoculation, the activity of PMG in both susceptible and resistant cultivars had two peak values in 2 dpi and 5 dpi. The activities of PMTE and β-glucosidase had a peak value in 3 dpi, and C_X in 2 dpi. Among these cell wall-degrading enzymes, the activities of PMG and PMTE were higher and the activities of C_X and β-glucosidase were relatively lower. The activities of these cell wall-degrading enzymes were significantly higher in susceptible cultivars than those in resistant cultivars. All these demonstrated that these cell wall-degrading enzymes played certain roles in the infection of M. larici-populina.

Keywords

Melampsora larici-populina / cell wall-degrading enzymes / poplar

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant No. 30471394) and the Scientific Research Foundation for the Returned Overseas Chinese Scholars, Ministry of Education.

RIGHTS & PERMISSIONS

2014 Higher Education Press and Springer-Verlag Berlin Heidelberg