The effects of triazophos applied to transgenic Bt rice on the nutritional indexes, Nlvg expression, and population growth of Nilaparvata lugens Stål under elevated CO₂.
The brown planthopper, Nilaparvata lugens (Stål) (Hemiptera: Delphacidae), is a typical pest in which population resurgence can be induced by insecticides. Warmer global temperatures, associated with anthropogenic climate change, are likely to have marked ecological effects on terrestrial ecosystems. However, the effects of elevated CO2 (eCO2) concentrations on the resurgence of N. lugens that have been treated with pesticides used for transgenic Bt rice cultivation are not fully understood. The present study investigated changes in the protein content, soluble sugar content, free amino acid level, vitellogenin (Nlvg) mRNA expression, and the population growth of N. lugens on transgenic Bt rice (TT51) following triazaophos foliar spray under conditions of eCO2. The results showed that the protein content in the fat bodies and ovaries of N. lugens adult females in TT51 treated with 40 ppm triazophos under eCO2 was significantly higher than under ambient CO2 (aCO2) and was also higher than that in females feeding on the non-transgenic parent (MH63) under aCO2 at different days after emergence (DAEs). The soluble sugar content and free amino level of adult females in TT51 treated with 40 ppm triazophos under eCO2 was significantly higher than under aCO2 and was also higher than in MH63 under aCO2 at 1 and 3 DAE. The Nlvg mRNA expression level of N. lugens adult females in TT51 treated with 40 ppm triazophos under eCO2 was significantly higher than under aCO2 and was also higher than in MH63 under aCO2 at 1 and 3 DAE. The population number of N. lugens in TT51 treated with 40 ppm triazophos under eCO2 was significantly higher than under aCO2 and was also higher than in MH63 under aCO2. The present findings provide important information for integrated pest management with transgenic varieties and a better understanding of the resurgence mechanism of N. lugens under eCO2.
State Key Laboratory of Integrated Management of Pest and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China; School of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China.
Lin-Quan
LQ
Ge
State Key Laboratory of Integrated Management of Pest and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China.
Yu-Cheng
YC
Sun
State Key Laboratory of Integrated Management of Pest and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China.
Fang
F
Ouyang
School of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China.
Jin-Cai
JC
Wu
State Key Laboratory of Integrated Management of Pest and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China. Electronic address: gef@ioz.ac.cn.
Feng
F
Ge
D000383:Agriculture; D000818:Animals; D002245:Carbon Dioxide / Q000032:analysis*; D057231:Climate Change; D017753:Ecosystem; D005260:Female; D006430:Hemiptera / Q000187:drug effects* / Q000235:genetics / Q000254:growth & development* / Q000378:metabolism; D019476:Insect Proteins / Q000235:genetics* / Q000378:metabolism; D007306:Insecticides / Q000494:pharmacology*; D008297:Male; D063086:Organothiophosphates / Q000494:pharmacology*; D012275:Oryza / Q000187:drug effects / Q000235:genetics / Q000469:parasitology*; D010935:Plant Diseases / Q000235:genetics / Q000469:parasitology* / Q000517:prevention & control; D014230:Triazoles / Q000494:pharmacology*
D019476:Insect Proteins; D007306:Insecticides; D063086:Organothiophosphates; D014230:Triazoles; D002245:Carbon Dioxide; C012584:triazophos
Elevated CO(2); Nilaparvata lugens; Nutritional indexes; Population growth; Triazophos; Vitellogenin