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- Title
Sogatella furcifera Saliva Mucin-like Protein Is Required for Feeding and Induces Rice Defences.
- Authors
Liu, Yudi; Yi, Jinyu; Jia, Haokang; Miao, Yutong; Hou, Maolin
- Abstract
The white-backed planthopper (WBPH), Sogatella furcifera, is one of the most important piercing-sucking pests of rice (Oryza sativa) in Asia. Mucin-like salivary protein (SFMLP) is highly expressed in the salivary glands of WBPH, which plays an important role in WBPH feeding. In this study, WBPH injected with dsSFMLP had difficulty in sucking phloem sap from rice plants, which significantly reduced their food intake, weight, and survival. In contrast, the knockdown of the SFMLP gene had only a marginal effect on the survival of WBPH fed an artificial diet. Further studies showed that silencing SFMLP resulted in the short and single-branched salivary sheaths secretion and less formation of salivary flanges in rice. These data suggest that SFMLP is involved in the formation of the salivary sheath and is essential for feeding in WBPH. Overexpression of the SFMLP gene in rice plants promoted the feeding of WBPH, whereas silencing the gene in rice plants significantly decreased WBPH performance. Additionally, it was found that overexpression of SFMLP in rice plants elicited the signalling pathway of SA (salicylic acid) while suppressing JA (jasmonic acid); in contrast, silencing of the SFMLP gene in rice plants showed the opposite results. This study clarified the function of SFMLP in WBPH feeding as well as mediating rice defences.
- Subjects
ASIA; PLANT gene silencing; RICE breeding; SALIVARY proteins; RICE; SALIVARY glands; GENE silencing; GENETIC overexpression
- Publication
International Journal of Molecular Sciences, 2022, Vol 23, Issue 15, p8239
- ISSN
1661-6596
- Publication type
Article
- DOI
10.3390/ijms23158239