? Effects of lead stress on <em>Vg</em> expression in the beet armyworm over five successive generations
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    2019, Vol. 18 Issue (01): 134-142     DOI: 10.1016/S2095-3119(18)61931-8
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Effects of lead stress on Vg expression in the beet armyworm over five successive generations
SU Hong-hua, YANG Yong, QIAN Yuan-yuan, YE Zi-bo, CHEN Yu-qing, YANG Yi-zhong
School of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, P.R.China
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Abstract 
Heavy metals have been found to be endocrine disruptors in invertebrates.  Lead is one of the most widespread elements of contamination, but there has been no research about the effects of lead stress on vitellogenin (Vg) gene expression in insects exposed to lead over multiple generations.  In this paper, the effects of different concentrations of lead (0, 0.3, 4.8 and 76.8 mg kg–1) on the expression of Vg in the beet armyworm over five successive generations were studied.  The results showed that lead stress had significant effects on Vg expression in a dose-dependent manner.  For females at the larval and adult stages, as lead concentration increased, Vg expression was significantly inhibited; for males at these two developmental stages, Vg expression was induced and increased as lead concentration increased.  In addition, with the increase over stressed generations, inhibited effects for females and induced effects for males at the larval and adult stages became increasingly more obvious.  However, at the pupal stage, Vg expression in the two genders was different from that at the larval and adult stages.  The results indicate that lead stress can upregulate Vg expression in males which should be a useful indicator for environmental risk assessment.
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SU Hong-hua
YANG Yong
QIAN Yuan-yuan
YE Zi-bo
CHEN Yu-qing
YANG Yi-zhong
Key wordsSpodoptera exigua     lead stress     vitellogenin     gene expression     females     males     
Received: 2017-12-12; Accepted: 2018-02-28
Fund: This research was supported by the National Key Research and Development Program of China (2017YFD0201907), the National Science and Technology Major Project, China (2016ZX08012-004), and the Key Research and Development Project of Jiangsu Province, China (BE2017379-3).
Corresponding Authors: Correspondence YANG Yi-zhong, E-mail: yzyang@yzu.edu.cn    
About author: SU Hong-hua, Tel: +86-514-87979344, E-mail: hhsu@yzu.edu.cn;
Cite this article:   
SU Hong-hua, YANG Yong, QIAN Yuan-yuan, YE Zi-bo, CHEN Yu-qing, YANG Yi-zhong. 2019. Effects of lead stress on Vg expression in the beet armyworm over five successive generations. Journal of Integrative Agriculture, 18(01): 134-142.
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http://www.chinaagrisci.com/Jwk_zgnykxen/EN/ 10.1016/S2095-3119(18)61931-8      or     http://www.chinaagrisci.com/Jwk_zgnykxen/EN/Y2019/V18/I01/134
 
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[1] DAI Wei, LI Yao, ZHU Jun, GE Lin-quan, YANG Guo-qing, LIU Fang. Selectivity and sublethal effects of some frequently-used biopesticides on the predator Cyrtorhinus lividipennis Reuter (Hemiptera: Miridae)[J]. Journal of Integrative Agriculture, 2019, 18(01): 124-133.
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