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Down-Regulation of Strigolactone Biosynthesis Gene D17 Alters the VOC Content and Increases Sogatella furcifera Infectivity in Rice

Author

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  • Shanshan Li

    (College of Plant Protection, Hunan Agricultural University, Changsha 410128, China)

  • Hualiang He

    (College of Plant Protection, Hunan Agricultural University, Changsha 410128, China)

  • Lin Qiu

    (College of Plant Protection, Hunan Agricultural University, Changsha 410128, China)

  • Qiao Gao

    (College of Plant Protection, Hunan Agricultural University, Changsha 410128, China)

  • Youzhi Li

    (College of Plant Protection, Hunan Agricultural University, Changsha 410128, China
    Hunan Provincial Engineering & Technology Research Center for Biopesticide and Formulation Processing, Changsha 410128, China)

  • Wenbing Ding

    (College of Plant Protection, Hunan Agricultural University, Changsha 410128, China
    Hunan Provincial Engineering & Technology Research Center for Biopesticide and Formulation Processing, Changsha 410128, China)

Abstract

DWARF17 ( D17 / HTD1 ) is a well-defined rice strigolactone (SL) biosynthesis gene that influences rice tiller development and the production of rice. To investigate whether SLs play a role in the regulation of rice’s defense against the white-backed planthopper (WBPH, Sogatella furcifera ), we compared a SL-biosynthetic defective mutant ( d17 ) with WT rice plants. Our olfactory bioassay results revealed that WBPHs are attracted to d17 plants, which may be attributed to changes in rice volatile substances. Hexanal, a volatile substance, was significantly reduced in the d17 plants, and it was demonstrated that it repelled WBPHs at a concentration of 100 μL/L. Compared to the WT plants, WBPH female adults preferred to oviposit on d17 plants, where the egg hatching rate was higher. The transcript level analysis of defense-associated genes in the JA and SA pathways showed that the expression of OsJAmyb, OsJAZ8 , OsPR1a and OsWRKY62 were significantly reduced in d17 plants compared to WT plants following WBPH infection. These findings suggest that silencing the strigolactone biosynthesis gene D17 weakens defenses against S. furcifera in rice.

Suggested Citation

  • Shanshan Li & Hualiang He & Lin Qiu & Qiao Gao & Youzhi Li & Wenbing Ding, 2023. "Down-Regulation of Strigolactone Biosynthesis Gene D17 Alters the VOC Content and Increases Sogatella furcifera Infectivity in Rice," Agriculture, MDPI, vol. 13(4), pages 1-12, April.
    • Handle: RePEc:gam:jagris:v:13:y:2023:i:4:p:842-:d:1119207
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    References listed on IDEAS

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    1. Liang Jiang & Xue Liu & Guosheng Xiong & Huihui Liu & Fulu Chen & Lei Wang & Xiangbing Meng & Guifu Liu & Hong Yu & Yundong Yuan & Wei Yi & Lihua Zhao & Honglei Ma & Yuanzheng He & Zhongshan Wu & Kars, 2013. "DWARF 53 acts as a repressor of strigolactone signalling in rice," Nature, Nature, vol. 504(7480), pages 401-405, December.
    2. Mikihisa Umehara & Atsushi Hanada & Satoko Yoshida & Kohki Akiyama & Tomotsugu Arite & Noriko Takeda-Kamiya & Hiroshi Magome & Yuji Kamiya & Ken Shirasu & Koichi Yoneyama & Junko Kyozuka & Shinjiro Ya, 2008. "Inhibition of shoot branching by new terpenoid plant hormones," Nature, Nature, vol. 455(7210), pages 195-200, September.
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