Penicillin ingestion influences toxic effects of several Cry toxins from Bacillus thuringiensis on Spodoptera exigua larvae | 青霉素影响甜菜夜蛾幼虫耐受几种苏云金杆菌晶体蛋白的能力
2011
Chen Ruirui, Nanjing Agricultural University, Nanjing(China),College of Plant Protection | Cui Jinjie, Chinese Academy of Agricultural Science, Anyang(China),Institute of Cotton | Li Guoqing, Nanjing Agricultural University, Nanjing(China),College of Plant Protection
chinois. 摘 要：本文评估了Cry1Ab、Cry1Ba和Cry1Ca蛋白对甜菜夜蛾2龄幼虫的毒力，其LC50分别为0．4425、0．6757μg／cm2和0．1502μg／cm2，Cry1Ba毒力最低，其次是Cry1Ab，而Cry1Ca毒力最高。青霉素影响幼虫对晶体毒素的耐受能力；一次添加高剂量（500ug／cm2）青霉素于饲料中显著提高幼虫的耐受能力，以含低剂量（60μg／CE）青霉素的饲料饲养幼虫多代也能达到相似的效果。
Afficher plus [+] Moins [-]anglais. Toxicities of Cry1Ab, Cry1Ba and Cry1Ca from Bacillus thuringiensis to the 2nd-instar larvae of Spodoptera exigua were evaluated. The LC50 values were 0. 442 5μg/cm. , 0. 675 7μg/cm. and 0. 150 2μg/cm. , respectively. CrylBa was least toxic, followed by CrylAb, and CrylCa was most toxic. Penicillin affected larval tolerance to the 3 Cry toxins. At the concentration of 500μg/cm. , penicillin mixed directly with the toxins could significantly increase larval tolerance. At the concentration of 60μg/cm. , however, penicillin should be first added alone to the diet for the larvae for several generations to obtain similar tolerance.
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