英语语法分析

The spores of hyperparasitic Streptomyces strains PR and F46 were irradiated with UV light to improve the control effects against plant diseases.

本研究以重寄生链霉菌PR 和F46 为出发菌株，以靶标病原菌为指示菌，以紫外线为诱变因子，对它们进行了诱变改良研究。