The results show that the stimulation intensity of ethylene gas affects the activity of chitinase greatly, but show no obvious effect on the content of chitinase.

结果发现，酶活性受刺激量的影响很大．而酶蛋白含量几乎不受刺激量的影响。

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The activities of chitinase for effective and non-effective strains had not much difference, and the strains which were strongly lethal to the juveniles did not have high activity of chitinase.

对线虫有强致死作用的菌株并不具有较高的几丁质酶活，细菌对北方根结线虫二龄幼虫的致死作用与其分泌的几丁质酶活性的高低相关性不大。

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The pathogens infection induced the chitinase activity increase and the chitinase isozymes change. The high chitinase activity or specific chitinase isozymes have enhanced disease resistance of plant.

病原物的侵染诱导植物几丁质酶活性升高和产生新的几丁质酶同工酶，这些高活性的几丁质酶或特异性的同工酶提高了植物的抗病性；

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