甜菜几丁质酶和β-1,3-葡聚糖酶活性与其对丛根病抗性的关系

The Relationship Between Activities of Chitinase and β-1,3-Glucanase and Resistance to Rhizomania in Sugar Beet

应用比较生理学方法,以抗丛根病(rhizomania)性不同的4个甜菜品种为材料,研究了丛根病地和无丛根病地上抗、感病品种的几丁质酶(chitinase)和β-1,3-葡聚糖酶(β-1,3-glucanase)活性与甜菜抗丛根病的关系。抗病品种在病地和无病地上皆比感病品种具有较高的几丁质酶和β-1,3-葡聚糖酶活性,表明这两种酶与甜菜抗丛根病性有关;另外,病地上两种酶的活性均不同程度地高于无病地上,是病原物侵染诱导抗性的表现。

The relationship between activities ofchitinase and β-1,3-glucanase and resistance torhizomania of sugar beet were studied in diseased soiland disease-free soil by using a method of compara-tive physiology. Two resistant varieties and two sus-ceptible ones of sugar beet were used in thisexperiment. Chitinase and β-1,3-glucanase activitiesof the resistant varieties were higher than the suscep-tible ones in either diseased soil or disease-free soil(Figs.1–4). There is a positive correlation between chitinase, β-1,3-glucanase activity and yield of beetin diseased soil (Table 2), suggesting that pathogeninfection can induce resistance to rhizomania throughactivating chitinase and β-1,3-glucanase.