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本文用扫描电镜研究了三孢布拉氏霉的形态发生。该菌正株和负株在无性繁殖中都形成大孢子囊和小孢子囊。正株的小孢子囊有单孢和多孢之分，而负株的仅见多孢。本文对接合孢子的观察与Ｍｉｓｔｒｙ［５］的基本一致，并发现成熟的接合孢子的配囊柄在其两端或并立。
In this paper, scanning electron microscopy was used to study the morphogenesis of B. trispora. The positive and negative strains of the bacteria in the clonal formation of megaspore and microsporangia. Positive strains of microspore have single spore and polysaccharide points, and negative strains only see spore. In this paper, the observation of splicing spores is basically consistent with that of Mistry [5], and it is found that the sporocysts of mature sporulating spores are co-located at both ends.