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1981年11月在河北承德地区20多年生的山杨(Populus davidiana Dode)树干上发现了黑色小球腔菌(Leptosphaeria aegira Sacc et Speg)。该菌是国内首次发现。其主要特征如下: 子实体生于树干上,埋生于木栓层内,后期突破表皮露出,呈半圆形凸起,黑色、有光泽。 子囊壳球形、散生、黑色,大小为0.15—0.25×0.15～0.25mm,子囊平行排列在子囊腔的基部(图1),子囊之间有假侧丝。子囊壳顶部有一个圆形孔口,径宽30—40 μm(图
In November 1981, Leptosphaeria aegira Sacc et Speg was found on the trunk of Populus davidiana Dode, a perennial 20-year-old in Chengde, Hebei Province. The bacteria is the first discovery in China. Its main features are as follows: The fruiting body was born in the trunk, buried in the cork layer, the latter break through the epidermis, was semicircular convex, black, shiny. Oocysts shell spherical, loose, black, the size of 0.15-0.25 × 0.15 ~ 0.25mm, the ascus arranged in parallel to the base of the cystic cavity (Figure 1), between the pseudocysts there are false-side silk. The top of the capsule has a circular orifice with a diameter of 30-40 μm (Fig