Journal
METABOLITES
Volume 10, Issue 11, Pages -Publisher
MDPI
DOI: 10.3390/metabo10110425
Keywords
strigolactones; metabolome; transcriptome; defense; WRKY45; rice (Oryza sativa)
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Funding
- National Natural Science Foundation of China [31800250, 31960063]
- National Science Fund for Distinguished Young Scholars [31625021]
- State Key Program of the National Natural Science Foundation of China [31530052]
- Hainan University Startup Fund [KYQD(ZR)1866, KYQD(ZR)1824]
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Plants have evolved many metabolites to meet the demands of growth and adaptation. Although strigolactones (SLs) play vital roles in controlling plant architecture, their function in regulating plant metabolism remains elusive. Here we report the integrative metabolomic and transcriptomic analyses of two rice SL mutants, d10 (a biosynthesis mutant) and d14 (a perception mutant). Both mutants displayed a series of metabolic and transcriptional alterations, especially in the lipid, flavonoid, and terpenoid pathways. Levels of several diterpenoid phytoalexins were substantially increased in d10 and d14, together with the induction of terpenoid gene cluster and the corresponding upstream transcription factor WRKY45, an established determinant of plant immunity. The fact that WRKY45 is a target of IPA1, which acted as a downstream transcription factor of SL signaling, suggests that SLs contribute to plant defense through WRKY45 and phytoalexins. Moreover, our data indicated that SLs may modulate rice metabolism through a vast number of clustered or tandemly duplicated genes. Our work revealed a central role of SLs in rice metabolism. Meanwhile, integrative analysis of the metabolome and transcriptome also suggested that SLs may contribute to metabolite-associated growth and defense.
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