油茶果皮颜色对炭疽病的抗性的影响

Relationship of Peel Color with Resistance to Anthracnose in Oiltea Camellia

将安徽6种油茶栽培品种根据果皮颜色分为3种类型:即红果类、青果类和杂色果类,并以人们公认抗病性最强的攸县油茶为对照。对各类型油茶品种进行林间抗病性调查;同时室内测定各品种果实潜伏侵染概率、果皮滤液的pH值及缓冲容量、果皮滤液的孢子萌发试验。结果表明:果实不同色泽的油茶对炭疽病抗性存在着显著差异,红果类油茶为高抗品种;青果类油茶为感病品种;杂色果类油茶发病率介于两者之间,为中抗品种。

Based on the color of fruit peel the rich variety of oil-tea cultivars in Anhui Province were grouped into three types of red, mottle and green fruit, and Camellia yuhsienensis was treated as control for its high-resistance to anthracnose Colletotrichum gloeosporioides. The resistance of these cultivars to C. gloeosporioides was determined by the investigation of disease incidence in field, and the percentage of latent infection, pH value and biffer caoacuty,conidia germination rate of the peel extract. The results showed that there was significant difference between the redpeel cuhivar, green-peel cuhivar and mottle-cultivar.While the red-peel type had the highest resistance to C. gloeosporioide and thus were high-resistant cultivars,the green-peel type were high-susceptible individuals, The mottle-peel cultivars whose disease incidence were among the red and green types were middle-resistance cultivars.