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Ubiquitylomes and proteomes analyses provide a new interpretation of the molecular mechanisms of rice leaf senescence

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Abstract

Main conclusion

We identified a typical rice premature senescence leaf mutant 86 (psl86) and exhibited the first global ubiquitination data during rice leaf senescence.

Abstract

Premature leaf senescence affects the yield and quality of rice, causing irreparable agricultural economic losses. In this study, we reported a rice premature senescence leaf mutant 86 (psl86) in the population lines of rice (Oryza sativa) japonica cultivar ‘Yunyin’ (YY) mutagenized using ethyl methane sulfonate (EMS) treatment. Immunoblotting analysis revealed that a higher ubiquitination level in the psl86 mutant compared with YY. Thus, we performed the proteome and ubiquitylome analyses to identify the differential abundance proteins and ubiquitinated proteins (sites) related to leaf senescence. Among 885 quantified lysine ubiquitination (Kub) sites in 492 proteins, 116 sites in 94 proteins were classified as up-regulated targets and seven sites in six proteins were classified as down-regulated targets at a threshold of 1.5. Proteins with up-regulated Kub sites were mainly enriched in the carbon fixation in photosynthetic organisms, glycolysis/gluconeogenesis and the pentose phosphate pathway. Notably, 14 up-regulated Kub sites in 11 proteins were enriched in the carbon fixation in photosynthetic organism pathway, and seven proteins (rbcL, PGK, GAPA, FBA5, ALDP, CFBP1 and GGAT) were down-regulated, indicating this pathway is tightly regulated by ubiquitination during leaf senescence. To our knowledge, we present the first global data on ubiquitination during rice leaf senescence.

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Abbreviations

CBC:

Calvin–Benson cycle

EMS:

Ethyl methane sulfonate

GO:

Gene ontology

KEGG:

Kyoto encyclopedia of genes and genomes

Kub:

Lysine ubiquitination

psl86 :

Premature senescence leaf mutant 86

YY:

Rice japonica cultivar ‘Yunyin

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Acknowledgements

This work was supported by the National Key R&D Program Foundation of China (Grant no. 2016YFD0300508), Key program of Science and Technology in Fujian province, China (No. 2020NZ08016), and The Special Foundation of Non-Profit Research Institutes of Fujian Province (Grant no. 2018R1021-5).

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Correspondence to Huaan Xie or Jianfu Zhang.

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The authors declare no conflicts of interest.

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Communicated by Dorothea Bartels.

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Table S1 Differentially expressed proteins between psl86 and YY (XLSX 24149 kb)

Table S2 Gene Ontology enrichment of differentially expressed proteins (XLSX 1554 kb)

Table S3 Differentially modified sites (proteins) between psl86 and YY (XLSX 3362 kb)

Table S4 Subcellular localization of differentially modified sites (proteins) (XLSX 53 kb)

Table S5 Gene Ontology enrichment of differentially modified sites (proteins) (XLSX 577 kb)

Table S6 Protein domain analysis of differentially modified sites (proteins) (XLSX 44 kb)

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Table S7 Kyoto Encyclopedia of Genes and Genomes enrichment analysis of differentially modified sites (proteins) (XLSX 65 kb)

Table S8 Motif analysis of differentially modified sites (proteins) (XLSX 221 kb)

425_2021_3793_MOESM9_ESM.xlsx

Table S9 Differentially expressed proteins and modified sites (proteins) in the carbon fixation in photosynthetic organisms pathway (map00710) (XLSX 24 kb)

Table S10 Differentially expressed proteins validated by parallel reaction monitoring (XLSX 20 kb)

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Yu, X., Zhu, Y., Xie, Y. et al. Ubiquitylomes and proteomes analyses provide a new interpretation of the molecular mechanisms of rice leaf senescence. Planta 255, 43 (2022). https://doi.org/10.1007/s00425-021-03793-z

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  • DOI: https://doi.org/10.1007/s00425-021-03793-z

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