假单胞菌中抗真菌成分对植物病原真菌准性产孢的抑制作用

我们目前正进行铜绿假单胞菌（PAFS）中抗真菌物质的纯化研究，本文考察对卵菌产孢及菌丝生长具抑制活性的部分纯化成分的特性。PAFS中的初级成分：A1，A2，A3及A6似乎包含2类抗菌组分，A1，A2及A3对子囊菌准性产孢具特异性抑制作用，导致孢子发育不完全，然而有趣的是这些成分对菌丝生长抑制作用不明显。相反，A6对卵菌菌丝生长具抑制活性，另外在含A6条件下产生的孢子萌发的非对称性说明其抗菌活性具有持效性。

Suppressive Action of Antifungal Substances from Pseudomonas Bacteria (PAFS) in Asexual Sporulation of Plant Pathogenic Fungi

Antifungal substances from Pseudomonas aeruginosa (PAFS) are currently under purification, and its partially purified fractions with sporulation suppressing activity and another fraction with activity of inhibiting mycelial growth of Oomycota were investigated. Primary fractions of PAFS, A1, A2, A3, and A6 appeared to contain 2 classes of antifungal substances.First, fractions, A1, A2, and A3 elicit specific suppressive actions in asexual sporulation of ascomycete fungi, mainly by the incomplete development of spores; however, interestingly, these fractions have negligible inhibition in mycelial growth. In contrast, A6 appeared to have a inhibitory activity in mycelial growth of Oomycota. Also antifungal activities of these fractions seem to be persistent as revealed by the impaired germinability of spores which were formed in the regime of this fraction.