Defence and nutrition synergistically contribute to the distinct tolerance of rice subspecies to the stem borer, Chilo suppressalis
文献类型： 外文期刊
作者： Ju, Jia-Fei 1 ; Yang, Lei 1 ; Shen, Chen 1 ; Li, Jian-Cai 2 ; Hoffmann, Ary A. 3 ; Huang, Yu-Xuan 1 ; Zhu, Feng 4 ; Ji, Rui 1 ; Luo, Guang-Hua 1 ; Fang, Ji-Chao 1 ;
作者机构： 1.Jiangsu Acad Agr Sci, Inst Plant Protect, Jiangsu Key Lab Food Qual & Safety, State Key Lab Cultivat Base,Minist Sci & Technol, Nanjing 210014, Peoples R China
2.Chinese Acad Sci, Shanghai Inst Plant Physiol & Ecol, CAS Key Lab Insect Dev & Evolutionary Biol, Ctr Excellence Mol Plant Sci, Shanghai, Peoples R China
3.Univ Melbourne, Bio21 Inst, Sch BioSci, Melbourne, Vic, Australia
4.Jiangsu Plant Protect & Quarantine Stn, Nanjing, Peoples R China
5.Jiangsu Acad Agr Sci, Inst Plant Protect, Jiangsu Key Lab Food & Safety, State Key Lab Cultivat Base,Minist Sci & Technol, Nanjing 210014, Peoples R China
关键词： genetic differentiation; inducible defence; natural variation; striped stem borer
期刊名称：PLANT CELL AND ENVIRONMENT （ 影响因子：7.3； 五年影响因子：8.1 ）
ISSN： 0140-7791
年卷期： 2024 年 47 卷 7 期
页码：
收录情况： SCI
摘要： Damage caused by the rice striped stem borer (SSB), Chilo suppressalis (Walker) (Lepidoptera: Pyralidae), is much more severe on indica/xian rice than on japonica/geng rice (Oryza sativa) which matches pest outbreak data in cropping regions of China. The mechanistic basis of this difference among rice subspecies remains unclear. Using transcriptomic, metabolomic and genetic analyses in combination with insect bioassay experiments, we showed that japonica and indica rice utilise different defence responses to repel SSB, and that SSB exploited plant nutrition deficiencies in different ways in the subspecies. The more resistant japonica rice induced patterns of accumulation of methyl jasmonate (MeJA-part of a defensive pathway) and vitamin B-1 (VB1-a nutrition pathway) distinct from indica cultivars. Using gene-edited rice plants and SSB bioassays, we found that MeJA and VB1 jointly affected the performance of SSB by disrupting juvenile hormone levels. In addition, genetic variants of key biosynthesis genes in the MeJA and VB1 pathways (OsJMT and OsTH1, respectively) differed between japonica and indica rice and contributed to performance differences; in indica rice, SSB avoided the MeJA defence pathway and hijacked the VB1 nutrition-related pathway to promote development. The findings highlight important genetic and mechanistic differences between rice subspecies affecting SSB damage which could be exploited in plant breeding for resistance.
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