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Resistant cassava cultivars inhibit the papaya mealybug Paracoccus marginatus population based on their interaction: from physiological and biochemical perspectives

文献类型： 外文期刊

作者： Chen, Qing 1 ; Liu, Xiao-Qiang 1 ; Liang, Xiao 1 ; Liu, Ying 1 ; Wu, Chun-Ling 1 ; Xu, Xue-Lian 1 ; Wu, Yan 1 ; Chen, Qian 1 ; Yao, Xiao-Wen 1 ; Qiao, Yang 1 ; Shui, Jun 1 ;

作者机构： 1.Chinese Acad Trop Agr Sci, Environm & Plant Protect Inst, Haikou 571101, Hainan, Peoples R China

2.Chinese Acad Trop Agr Sci, Sanya Res Acad, Sanya 572000, Hainan, Peoples R China

3.Minist Agr & Rural Affairs, Key Lab Integrated Pest Management Trop Crops, Haikou 571101, Hainan, Peoples R China

4.Hainan Engn Res Ctr Biol Control Trop Crops Dis &, Haikou 571101, Hainan, Peoples R China

5.Hainan Key Lab Monitoring & Control Trop Agr Pest, Haikou 571101, Hainan, Peoples R China

6.Hainan Key Lab Biosafety Monitoring & Mol Breedin, Sanya 572000, Hainan, Peoples R China

关键词： Cassava cultivars; Paracoccus marginatus; Development and reproduction; Nutrition; Secondary metabolites; Enzymatic activities

期刊名称：JOURNAL OF PEST SCIENCE （ 影响因子：5.742； 五年影响因子：5.562 ）

ISSN： 1612-4758

年卷期：

页码：

收录情况： SCI

摘要： Paracoccus marginatus papaya mealybugs cause considerable threats and challenges to cassava production and processing. The deployment of resistant cultivars offers effective, economical and eco-friendly management strategies for pest management. We measured P. marginatus mortality, development and reproduction to evaluate the resistance of fifteen cassava cultivars and conducted physiological and biochemical analyses when P. marginatus was fed on two resistant cultivars (Myanmar and C1115) and three susceptible cultivars (BRA900, Bread, SC205). Significantly lower digestive (amylase, sucrase, lipase), detoxification (glutathione-S-transferase and carboxylesterase) and antioxidant activity, including superoxide dismutase (SOD), catalase (CAT), peroxidase (POD), and polyphenol oxidase (PPO), enzyme activities were observed in P. marginatus feeding on resistant cultivars compared to susceptible cultivars. For resistant cultivars, a significant reduction was found in nutritional components containing free amino acids, nitrogen, soluble sugars and the secondary metabolite malondialdehyde. Additionally, significantly higher enzymatic activity (SOD, CAT, POD and PPO) levels and secondary metabolite quantities (total phenol and tannins) were found in resistant cultivars induced by P. marginatus compared with susceptible ones. Additionally, RT-qPCR tests showed that the transcripts of ten genes involved in nutrition, secondary metabolites and antioxidant activities were consistent with physiology changes. Thus, the resistant cultivars suffered lower P. marginatus damage by elevating secondary metabolite contents and antioxidant activities, reducing plant nutrition levels and decreasing insect enzymatic activities. This study will be beneficial in developing indices for standard regulation to evaluate P. marginatus-resistant cassavas and effectively manage this pest.

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