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Insects


Title:Potato Tuberworm Phthorimaea operculella (Zeller) (Lepidoptera: Gelechioidea) Leaf Infestation Effects Performance of Conspecific Larvae on Harvested Tubers by Inducing Chemical Defenses
Author(s):Wang D; Wang Q; Sun X; Gao Y; Ding J;
Address:"State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng 475004, Henan, China. State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China"
Journal Title:Insects
Year:2020
Volume:20200915
Issue:9
Page Number: -
DOI: 10.3390/insects11090633
ISSN/ISBN:2075-4450 (Print) 2075-4450 (Electronic) 2075-4450 (Linking)
Abstract:"Conspecific aboveground and belowground herbivores can interact with each other, mediated by plant secondary chemicals; however, little attention has been paid to the interaction between leaf feeders and tuber-feeders. Here, we evaluated the effect of the foliar feeding of P. operculella larvae on the development of conspecific larvae feeding on harvested tubers by determining the nutrition and defense metabolites in the whole plant (leaf, root and tuber). We found that leaf feeding negatively affected tuber larval performance by increasing the female larval developmental time and reducing the male pupal weight. In addition, aboveground herbivory increased alpha-chaconine and glycoalkaloids in tubers and alpha-solanine in leaves, but decreased alpha-chaconine and glycoalkaloids in leaves. Aboveground herbivory also altered the levels of soluble sugar, soluble protein, starch, carbon (C), nitrogen (N), as well as the C:N ratio in both leaves and tubers. Aboveground P. operculella infestations could affect the performance of conspecific larvae feeding on harvested tubers by inducing glycoalkaloids in the host plant. Our findings indicate that field leaf herbivory should be considered when assessing the quality of potato tubers and their responses to pests during storage"
Keywords:Phthorimaea operculella glycoalkaloid induced defense potato tuber-feeders;
Notes:"PubMed-not-MEDLINEWang, Dingli Wang, Qiyun Sun, Xiao Gao, Yulin Ding, Jianqing eng (2017 YFC 1200100)/the National Key Research and Development Program/ Switzerland 2020/09/19 Insects. 2020 Sep 15; 11(9):633. doi: 10.3390/insects11090633"

 
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