文献类型： 外文期刊
作者： Yao, Yang 1 ; Lin, Huan-tai 1 ; Chen, Yao-hui 1 ; Chen, Li-lan 1 ; Zhang, Hui-li 1 ; Fu, Hua-ying 1 ; Gao, San-ji 1 ; Wang, Ran 2 ; Feng, Hong-lin 3 ; Wang, Jin-da 1 ;
作者机构： 1.Fujian Agr & Forestry Univ, Natl Engn Res Ctr Sugarcane, Fuzhou, Peoples R China
2.Beijing Acad Agr & Forestry Sci, Inst Plant Protect, Beijing, Peoples R China
3.Louisiana State Univ, Dept Entomol, Baton Rouge, LA 70803 USA
关键词： apyrase; benzoxazinoids; jasmonic acid; plant defence; salivary elicitor; Spodoptera frugiperda
期刊名称：PLANT CELL AND ENVIRONMENT （ 影响因子：6.3； 五年影响因子：7.7 ）
ISSN： 0140-7791
年卷期： 2025 年 48 卷 1 期
页码：
收录情况： SCI
摘要： Plants have developed various resistance mechanisms against herbivorous insects through prolonged coevolution. Plant defence responses can be triggered by specific compounds present in insect saliva. Apyrase, a known enzyme that catalyzes the hydrolysis of adenosine triphosphate (ATP) and adenosine diphosphate (ADP) into adenosine monophosphate (AMP) and inorganic phosphorus, has recently been identified in some herbivorous insects. However, whether insect salivary apyrase induces or inhibits plant responses remains poorly understood. In this study, we identified an apyrase-like protein in the salivary proteome of the fall armyworm, Spodoptera frugiperda, named Sfapyrase. Sfapyrase was primarily expressed in the salivary gland and secreted into plants during insect feeding. Transient expression of Sfapyrase in tobacco and maize enhanced plant resistance and resulted in decreased insect feeding. Knockdown of Sfapyrase through RNA interference led to increased growth and feeding of S. frugiperda. Furthermore, we showed that Sfapyrase activates the jasmonic acid signalling pathway and promotes the synthesis of secondary metabolites, especially benzoxazinoids, thereby enhancing resistance to S. frugiperda. In summary, our findings demonstrated that Sfapyrase acts as a salivary elicitor, inducing maize jasmonic acid defence responses and the production of insect-resistant benzoxazinoids. This study provides valuable insights into plant-insect interactions and offers potential targets for developing innovative insect pest management strategies.
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