Zinc Stress Alters Sugar Content in Rice Plants and the Reproduction and Trehalose Metabolism in <i>Nilaparvata lugens</i>
Yong-Kang Liu,
Cai-Di Xu,
Xu-Song Zheng,
Lei Chao,
Yan-Fei Zhou,
Guo-Yong Li,
Yan Wu,
Xue-Lian Bai,
Ting Zhou,
Bin Tang,
Hong-Xing Xu
Affiliations
Yong-Kang Liu
State Key Laboratory for Managing Biotic and Chemical Treats to the Quality and Safety of Agroproducts, Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
Cai-Di Xu
College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China
Xu-Song Zheng
State Key Laboratory for Managing Biotic and Chemical Treats to the Quality and Safety of Agroproducts, Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
Lei Chao
College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China
Yan-Fei Zhou
College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China
Guo-Yong Li
Guizhou Provincial Key Laboratory for Rare Animal and Economic Insect of the Mountainous Region, Department of Biology and Engineering of Environment, Guiyang University, Guiyang 550005, China
Yan Wu
Guizhou Provincial Key Laboratory for Rare Animal and Economic Insect of the Mountainous Region, Department of Biology and Engineering of Environment, Guiyang University, Guiyang 550005, China
Xue-Lian Bai
College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China
Ting Zhou
College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China
Bin Tang
College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China
Hong-Xing Xu
State Key Laboratory for Managing Biotic and Chemical Treats to the Quality and Safety of Agroproducts, Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
Excessive zinc (Zn) is toxic to plants, but the effect of zinc-stressed plants on herbivorous insects is still unclear. Hence, we assessed the effect of zinc-stressed rice plants on its feeding pest, Nilaparvata lugens. The soil–rice–N. lugens system was treated with Zn2+ solution. Sugar content in rice was measured, and the reproduction and trehalose metabolism in N. lugens were assessed. The trehalase activity in rice significantly decreased at 100 mg·kg−1 Zn2+, and the trehalose content increased. The glucose and starch content increased at higher Zn2+ concentrations. The fecundity and trehalose content of N. lugens decreased after feeding on zinc-stressed rice, and the glucose content in the high Zn2+ group was significantly higher than that in the low Zn2+ group. In addition, the soluble trehalase activity of N. lugens significantly decreased under the 125 mg·kg−1 treatment, while the activity of membrane-bound trehalase significantly increased under the 150 mg·kg−1 treatment. Quantitative RT-PCR indicated significantly lower expressions of NlTre1-1, NlTre2, and NITps after Zn treatment. In conclusion, Zn2+ treatment significantly altered the sugar content in rice plants; it also decreased the fecundity of N. lugens, which may be mediated by alterations in trehalose metabolism.
