Several mutants of Phaffia rhodozyma were obtained by exerting mutagen N-methyl-N-nitro-N-nitrosoguanidine.

天然菌株虾青素产量较少，缺少实用价值。

Intracellular PHB depolymerase and 3 hydroxybutyrate dehydrogenase catalyze the initial reactions of intracellular PHB catabolism.

进一步比较研究了不菌株PHB解聚酶和3羟基丁酸脱氢酶活性。

Catabolite repression is considered as a main factor controlling yield of cellulases.

降解物阻遏是菌株控制其产酶量调节机制。

Mixed culture of MTBE degrader was successfully isolated under aerobic condition using different acclimation patterns.

应用不驯化方式以MTBE为惟一碳,在好氧条件下,驯化、筛选出高效降解混菌株,为现场应用打好基础。

Effects of single strain cultivation and co cultivation of strains on biodegradation of valonia tannin were investigated.

以橡单宁为原料,通过培养、分离筛选出了14种菌株。

When the immuned tilapia challenged with the homotype and heterotye bacteria, the protection rates were both 16.7%.

免疫罗非鱼，和异菌株保护率为16.

Most of the wild and cultivated strains are secondarily homothallic mating type in life-cycle, but some wild strains are heterothallic.

大部分野生和栽培双孢蘑菇菌株和品种具有次级宗配性特征,也有少数野生菌株属于异宗配类型。

Known as a phytopathogen with several host plants, Cylindrocarpon destructans as a bio-control agent was the first reported in this dissertation.

毁灭柱孢是一种寄范围很窄植物病原菌，不植物病原真菌有突出拮抗效果，表明D-5是一株具有生防应用潜力菌株。

There was also obvious difference in pathogenicity even if different hosts were inoculated by the same spore isolates of Venturia inaequalis.

一菌株不寄品种致病力也存在较大差异。

The bacterium infection strain first place is the verdigris pseudomonad (31.2%), next is pneumonia gram Reber fungus (25.6%) and the epidermis staphylococcus (18.4%).

结果细菌感染菌株首位是铜绿假单胞菌(31.2%)，其次是肺炎克雷伯菌(25.6%)和表皮葡萄球菌(18.4%)。