Response of Cytochrome P450 Expression to Maize Volatiles in Helicoverpa armigera （Hubner）

• Published in: 农业科学学报：英文版 2013 (4), p.646-652
• Main Author: WUShao ying SHIXue yan WANGYi GAOXi Wu
• Format: Article
• Language: English
• Subjects: 人为损坏; 对照组; 差异表达; 挥发物; 时间变化; 棉铃虫; 玉米植株; 细胞色素P450基因
• ISSN: 2095-3119; 2352-3425

The 7-ethoxycoumarin O-deethylase （ECOD） activities of cytochrome P450s and differential expression of six cytochrome P450 genes induced by the volatiles from both damaged and undamaged maize plants were investigated in the cotton bollworm, Helicoverpa armigera （Hiabner）. The ECOD activity changed with time of exposure to maize volatiles. At 36 h after cotton bollworm larvae exposure to maize volatiles, the ECOD activities in cotton bollworm damaged and artificially damaged groups were 2.36 and 4.53 times higher than the control group respectively. The relative expression levels of CYP4S1, CYP6B2 and CYP6B7 in the cotton bollworm were significantly increased in artificially damaged plant group, which was 2.93, 5.09 and 10.66 times higher than that in the control group, respectively. The expression levels of CYP6B2, CYP6B6, CYP9A12, and CYP9A14 were much lower in the larvae exposure to volatiles from both healthy and pest damaged maize seedlings than in the control group at 12 h after larvae exposure to maize volatiles. For the cotton bollworm damaged maize group, the expression of CYP4S1 and CYP9A14 increased.