Abstract: The resistance to cabbage anthracnose induced by plant growth-promoting rhizobacteria strain NK1 was studied. The results indicated that the number of lesion and its area on the leaves were both significantly reduced compared with the control (P <0.05), the induced effectiveness to cabbage anthracnose reached 64% after strain NK1 treatment. Meanwhile, the induced effectiveness was significantly different by using different methods (P <0.05), that of seed treatment and root irrigation was the best. In addition, the research found that the induced effectiveness was the best under the condition of treating the cabbage seedlings with NK1 before inoculating Colletotrichum higginsianum as early as five days. Compared with the control, chitinase and β-1, 3-glucanase activity of the cabbage leaves and roots significantly increased after NK1 treatment(P <0.05), which suggested that strain NK1 could systemicly induce cabbage to produce resistance to cabbage anthracnose.

Key words: cabbage, plant growth-promoting rhizobacteria, anthracnose, induced resistance