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Assessment of non-target toxicity effects of synthetic estradiol, quinestrol, in chickens

Integrative Zoology 2022年第6期17卷 1053-1062页

作者： Siyuan HE Xunjun ZHOU Yong WANG Meiwen ZHANG Kangjuan WU University of the Chinese Academy of Sciences BeijingChina Key Laboratory for Agro-Ecological Processes in Subtropical Regions Institute of Subtropical AgricultureChinese Academy of SciencesChangshaChina Dongting Lake Station for Wetland Ecosystem Research Institute of Subtropical AgricultureChangshaChina

Fertility control agents for the management of rodent populations are developing and *** the impacts on non-target species of consumption of these agents is *** present study assessed the non-target toxicity effects of quinestrol,a synthetic estrogen-based antifertility agent for managing rodent *** quinestrol doses administered to male and female(n=60 each)chickens through single oral gavage were 0(A),10(B),50(C),and 150(D)mg/kg body *** were assessed for effect on body weight,weight of vital and reproductive organs,reproductive hormones,histology of reproductive organs and egg laying rates after 15,30,and 135 days of *** did not induce mortality in chickens and its effects were time and dose *** 90%egg-laying rates were delayed by 30,60 for groups B and C compared with the control group,and group D did not reach the 90%egg-laying rate by 135 *** organs in males and females returned to normal levels within 30 and 135 days,*** the exception of the FSH concentration in group D,reproductive hormones of both sexes were similar to controls by 30 *** other signiﬁcant effects were *** present research demonstrated the safety of quinestrol on non-target species and facilitates recommendations for the general administration of quinestrol for rodent pest management.

关键词： anti-fertility agent chicken non-target effects quinestrol

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Does Bt maize expressing CrylAc protein have adverse effects on the parasitoid Macrocentrus cingulum （Hymenoptera： Braconidae）？

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Insect Science 2017年第4期24卷 599-612页

作者： Zeng-Xia Wang Yun-He Li Kang-Lai He Shu-Xiong Bai Tian-Tao Zhang Wan-Zhi Cai Zhen-Ying Wang State Key Laboratory for Biology of Plant Diseases and Insect Pests MOA - CABI Joint Laboratory for Bio-safety Institute of Plant Protection Chinese Academy of Agricultural Science Beijing China Department of Entomology China Agriculture University Beijing China

The potential effects of insect-resistant, genetically engineered （GE） crops on non-target organisms, especially on predators and parasitoids, must be evaluated before their commercial cultivation. The effects of GE maize that produces CrylAc toxin on the parasitoid Macrocentrus cingulum were assessed by direct bioassay and indirect bioassay. In the indirect bioassay, parasitism rate, cocoon weight and the number of M. cingu- lure progeny produced per host were significantly reduced when M. cingulum-parasitized CrylAc-susceptible Ostriniafurnacalis were fed a diet containing purified CrylAc; how- ever, life-table parameters of M. cingulum were not adversely affected when the same assay was performed with Cry 1Ac-resistant （9. furnacalis. These results indicated that the detrimental effects detected with a CrylAc-susceptible host were mediated by poor host quality. In a direct bioassay, no difference in life-table parameters were detected when M. cingulum adults were directly fed a 20% honey solution with or without CrylAc; however, survival and longevity were significantly reduced when M. cingulum adults were fed a honey solution containing potassium arsenate, which was used as a positive control. The stability and bioactivity of CrylAc toxin in the food sources and CrylAc toxin uptake by the host insect and parasitoid were confirmed by enzyme-linked immunosorbent assay and sensitive-insect bioassays. Our results demonstrate that M. cingulum is not sensitive to CrylAc toxin at concentrations exceeding those encountered in Bacillus thuringiensis maize fields. This study also demonstrates the power of using resistant hosts when assess- ing the risk of genetically modified plants on non-target organisms and will be useful for assessing other non-target impacts.

关键词： CrylAc toxin ELISA environmental risk assessment non-target effects parasitoids prey/host quality-mediated effects

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Stylet penetration behaviors of the cotton aphid Aphis gossypfi on transgenic Bt cotton

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Insect Science 2009年第2期16卷 137-146页

作者： Kun Xue Xiao-Ying Wang Cui-Hong Huang Rong-Jiang Wang Biao Liu Feng-Ming Yan Chong-Ren Xu College of Life Sciences Peking University Beijing College of Plant Protection Henan Agricultural University Zhengzhou Nanjing Institute of Environmental Sciences State Environmental Protection Administration of China Nanjing College of Life and Environmental Sciences Minzu University of China Beijing China

Stylet penetration behaviors of cotton aphids Aphis gossypii Glover on a transgenic cotton line ＂GK-12＂ expressing Bt toxic protein of Cry 1A （Bt cotton） and a non- Bt conventional cotton line ＂Simian-3＂（CK cotton） were recorded with the direct current electrical penetration graph （DC-EPG） technique. Cotton aphids reared on Bt cotton （abbreviated as Bt-aphids） and its parental non-Bt control line （CK-aphids） for more than 20 generations each, were used for recordings on two cotton lines. Among 47 selected parameters reflecting the activities of aphid stylets within plant tissues, there were eight parameters of CK-aphids showing significant differences between the performances of CK- aphids on Bt cotton and CK cotton, while for Bt-aphids, all the parameters were statistically equal between the performances on the two cotton lines. All parameters with significant differences indicated that CK-aphids could penetrate into Bt cotton more easily, but the phloem saps of Bt cotton were not as good as those of regular cotton for CK-aphids. Based on the present results, we concluded that there were some factors in Bt cotton affecting penetration behaviors of CK-aphids, but it just took several generations for CK-aphids to completely adapt Bt cotton, and Bt-aphids could feed on two cotton lines without difficulty.

关键词： Aphis gossypii Bt cotton electrical penetration graph feeding behavior non-target effects stylet penetration behavior

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Reduced Mythimna separata infestation on Bt corn could benefit aphids

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Insect Science 2021年第4期28卷 1139-1146页

作者： Xiang-Wen Li Li-Xiao Du Lei Zhang Yu-Fa Peng Hong-Xia Hua Jörg Romeis Yun-He Li College of Plant Science&Technology of Huazhong Agriculture University WuhanHubei ProvinceChina State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijingChina Agroscope Research Division Agroecology and EnvironmentZurichSwitzerland

Use of genetically engineered plants that express insecticidal Cry proteins derived from Bacillus thuringiensis(Bt)have been proven efficacious for managing lepidopteran ***,in some cases herbivores that are not targeted by the Bt trait have increased in *** has been suggested that reduced caterpillar damage to Bt crops could lead to decreased levels of induced plant defensive compounds which might benefit other non-target *** we investigated the potential effect of reduced damage by larvae of Mythimna separata on aphid populations in Bt *** compared the performance of Rhopalosiphum maidis feeding on non-Bt corn plants that had been infested by *** larvae or were *** results showed that caterpillar-infested corn plants significantly reduced the fitness of *** leading to a prolonged nymphal development time,reduced adult longevity and fecundity compared to uninfested ***,the population growth rate of corn aphids feeding on caterpillar-infested corn plants was significantly lower than on uninfested *** expected,the aphids performed significantly better on Lepidoptera-resistant Bt corn than on non-Bt corn when plants were infested with ***,since the caterpillars caused very little damage to the Bt *** current findings indicate that reduced *** infestation could benefit aphid development in Bt *** corn has the potential to be commercialized in China in the near future and aphids and other non-target pests should be monitored in the farming fields.

关键词： genetically engineered crops interspecific relationship Mythimna separata non-target effects Rhopalosiphum maidis

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