Abstract
Key message
OsSPL10 is a negative regulator of rice defense against BPH, knockout of OsSPL10 enhances BPH resistance through upregulation of defense-related genes and accumulation of secondary metabolites.
Abstract
Rice (Oryza sativa L.), one of the most important staple foods worldwide, is frequently attacked by various herbivores, including brown planthopper (BPH, Nilaparvata lugens). BPH is a typical monophagous, phloem-sucking herbivore that has been a substantial threat to rice production and global food security. Understanding the regulatory mechanism of defense responses to BPH is essential for improving BPH resistance in rice. In this study, a SQUAMOSA PROMOTER-BINDING PROTEIN-LIKE 10 (OsSPL10) transcription factor was found to play a negative role in the defenses of rice against BPH. To gain insights into the molecular and biochemical mechanisms of OsSPL10, we performed combined analyses of transcriptome and metabolome, and revealed that knockout of OsSPL10 gene improved rice resistance against BPH by enhancing the direct and indirect defenses. Genes involved in plant hormone signal transduction, MAPK signaling pathway, phenylpropanoid biosynthesis, and plant–pathogen interaction pathway were significantly upregulated in spl10 mutant. Moreover, spl10 mutant exhibited increased accumulation of defense-related secondary metabolites in the phenylpropanoid and terpenoid pathways. Our findings reveal a novel role for OsSPL10 gene in regulating the rice defense responses, which can be used as a potential target for genetic improvement of BPH resistance in rice.
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Funding
This work is supported by the National Natural Science Foundation of China (32101676, U2005208, 31971833), the Natural Science Foundation of Fujian Province, China (2021J05019, 2020J02030, 2021J01075), the Fujian Agriculture and Forestry University Natural Science Funds for Distinguished Young Scholar (xjq21001), Young Talents Special Project of Yunnan Xingdian Talent Support Plan (Grant No. XDYC-QNRC-2022–0717).
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LL and ZS performed most of the work and initiated the draft. RW, YD, and ZZ helped with some experiments and data analysis. RZ, YS and TL conceived the study, obtained funding, and revised the final version of the manuscript. All authors read and approved the final article.
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Supplementary file 1:
Figure S1. Validation of nine DEGs using qRT-PCR. Figure S2. Principal component analysis (PCA) of all detected metabolites in spl10 and ZH11 seedlings at 0 (A), 6 (B), 24 (C), and 48h (D) after BPH infestation (Six biological replicates per treatment). Figure S3. Partial least squares-discriminant analysis (PLS-DA) of all detected metabolites in spl10 and ZH11 seedlings at 0 (A), 6 (B), 24 (C), and 48h (D) after BPH infestation (Six biological replicates per treatment). Figure S4. Metabolomic analysis of spl10 and ZH11 seedlings before and after BPH feeding. Figure S5. HMDB annotation for all DEMs between spl10 and ZH11 seedlings at different timepoints after BPH infestation. Figure S6. KEGG annotation for all DEMs between spl10 and ZH11 seedlings at different timepoints after BPH infestation. Figure S7. Correlation analysis of transcriptomic and metabolomic data from BPH-infested spl10 and ZH11 plants. Figure S8. Limonene showing the repellent role for BPH.
Supplementary file 2:
Table S1. List of DEGs between spl10 and ZH11 plants after BPH infestation.
Supplementary file 3:
Table S2. KEGG enrichment analysis of DEGs between spl10 and ZH11 plants at four timepoints after BPH infestation.
Supplementary file 4:
Table S3. GO enrichment analysis of DEGs between spl10 and ZH11 plants at four timepoints after BPH infestation.
Supplementary file 5:
Table S4. Expression changes of defensive phytohormone-responsive genes in spl10 mutant and ZH11 plants at different timepoints after BPH infestation.
Supplementary file 6:
Table S5. List of differentially expressed transcription factors (TFs) regulated by SPL10.
Supplementary file 7:
Table S6. List of differentially expressed metabolites between spl10 and ZH11 plants after BPH infestation.
Supplementary file 8:
Table S7. List of primers used in this study.
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Lu, L., Sun, Z., Wang, R. et al. Integration of transcriptome and metabolome analyses reveals the role of OsSPL10 in rice defense against brown planthopper. Plant Cell Rep 42, 2023–2038 (2023). https://doi.org/10.1007/s00299-023-03080-z
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DOI: https://doi.org/10.1007/s00299-023-03080-z