Mechanisms of callose deposition in rice regulated by exogenous abscisic acid and its involvement in rice resistance to Nilaparvata lugens Stål (Hemiptera: Delphacidae). Issue 12 (12th September 2017)

• Record Type: Journal Article
• Authors: Liu, Jinglan; Du, Haitao; Ding, Xu; Zhou, Yaodong; Xie, Pengfei; Wu, Jincai
• Is Part Of: Pest management science. Volume 73:Issue 12(2017)
• Page Start: 2559
• Page End: 2568
• Publication Date: 2017-09-12
• Subjects: callose -- abscisic acid (ABA) -- rice -- brown planthopper (Nilaparvata lugens Stål -- BPH) -- resistance; Pests -- Control -- Periodicals; Pesticides -- Periodicals; 632.9
• DOI: 10.1002/ps.4655
• Languages: English
• ISSNs: 1526-498X

Abstract

Abstract: BACKGROUND: Callose is a plant cell wall polysaccharide controlled by β‐1, 3‐glucanase and synthase. Abscisic acid (ABA) is an important plant hormone. Exogenous ABA promotes rice resistance to pests. Whether exogenous ABA could reduce the decline in rice yield after brown planthopper ( Nilaparvata lugens Stål; BPH) feeding is an important question, however, the mechanisms behind rice resistance induced by ABA remain obscure. RESULTS: Electronic penetration graph (EPG) recording indicated a significant increase in rice resistance to BPH, and the number of BPH eggs decreased significantly upon application of exogenous ABA. As the concentration of ABA increased, the reduction in rice yield decreased significantly after BPH feeding. Further studies showed that β ‐1, 3‐glucanase activity was significantly lower, but synthase activity was higher after ABA treatment than in controls. CONCLUSIONS: Our results demonstrated that exogenous ABA suppressed β ‐1, 3‐glucanase and induced synthase activity, and promoted callose deposition. This is an important defense mechanism that prevents BPH from ingesting phloem sap. These studies provide support for an insect‐resistance mechanism after ABA treatment and provide a reference for the integrated management of other piercing–sucking pests. © 2017 Society of Chemical Industry