普通油茶对炭疽病抗性的病理学研究

由于油茶炭疽病菌(Colletotrichum camelliaeMassee)的危害,使普通油茶(Camelliaoleif elaAbol)大量落花落果,这是严重影响油茶林产量的重要原因之一。但在普通油茶林中存在对油茶炭疽菌不同抗性的类型。因此,近年来采用选择对炭疽病抗性强、结实性状优良的单株建立无性系林的方法,提高了油茶林产量[1～3]。国内对不同油茶物种叶面抗炭疽病的组织病理学观察,曾有过报道[4]。但对油茶炭疽病菌在普通油茶不同抗病类型植株果实表面的萌发习性,侵入途径和产孢能力尚未见有报道。本文就这些方面作如下报道。

Preliminary Study on Pathology of Resistance to Anthracnose in Different Oil tea Camelliae Type

The resistant and susceptible fruits of the oil tea camelliae were inoculated by anthracnose causing fungus ( Colletotricum camelliae Massee )and observations were made under scanning electron microscope and bright field microscope. The result showed that the germination time of conidia on the fruits surface of high resistant type were later than that on the high susceptible type,but the difference in the percentage of conidia germination between the two type was not evident.However the length of germ tubes seems to be contrary in relation to resistance after inoculation for twenty hours. The germ tubes grew toward the wound and infected the fruit surface of both types.The numbers of the conidia on the fruits surface of high resistant type seemed to be under control.