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XSP10 and SlSAMT, Fusarium wilt disease responsive genes of tomato (Solanum lycopersicum L.) express tissue specifically and interact with each other at cytoplasm in vivo

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Abstract

Fusarium wilt caused by Fusarium oxysporum f. sp. lycopersici (Fol) is a major fungal disease of tomato (Solanum lycopersicum L.). Xylem sap protein 10 (XSP10) and Salicylic acid methyl transferase (SlSAMT) have been identified as putative negative regulatory genes associated with Fusarium wilt of tomato. Despite their importance as potential genes for developing Fusarium wilt disease tolerance, very little knowledge is available about their expression, cell biology, and functional genomics. Semi-quantitative and quantitative real-time PCR expression analysis of XSP10 and SlSAMT, in this study, revealed higher expression in root and flower tissue respectively in different tomato cultivars viz. Micro-Tom (MT), Arka Vikas (AV), and Arka Abhed (AA). Therefore, the highly up-regulated expression of XSP10 and SlSAMT in biotic stress susceptible tomato cultivar (AV) than a multiple disease resistant cultivar (AA) suggested the disease susceptibility nature of these genes for Fusarium wilt. Sub-cellular localization analysis through the expression of gateway cloning constructs in tomato protoplasts and seedlings showed the predominant localization of XSP10 in the nucleus and SlSAMT at the cytoplasm. A strong in vivo protein–protein interaction of XSP10 with SlSAMT at cytoplasm from bi-molecular fluorescent complementation study suggested that these two proteins function together in regulating responses to Fusarium wilt tolerance in tomato.

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Abbreviations

XSP:

Xylem sap protein

SAMT:

Salicylic acid methyl transferase

MeSA:

Methyl salicylate

RT-PCR:

Reverse transcriptase polymerase chain reaction

qRT-PCR:

Quantitative real time polymerase chain reaction

PPI:

Protein–protein interactions

Split-YFP:

Split-yellow fluorescence protein

Bi-FC:

Bimolecular fluorescence complementation

TRAX:

Translin-associated factor X

CCoAOMT:

Caffeoyl-CoA O-methyltransferase

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Acknowledgements

The authors acknowledge the Director, CSIR-NEIST Jorhat for the facility and lab space. Authors thank ICAR-IIHR, Bangalore for providing the seeds of tomato cultivars. Authors also acknowledge Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India for PhD program of JD and BS.

Funding

The work was funded by Science and Engineering Research Board (SERB), Govt. of India, Grant Code: SB/S2/RJN-078/2014 as Ramanujan Fellowship and Grant Code: ECR/2016/001288 as Early Career Research Award to C.C.

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CC designed the concept, discussed and corrected the manuscript and involved in overall co-ordination of the project. JD collected the data, performed all the experiments, prepared the figures and tables, analysed the data and drafted the manuscript. BS carried out data analysis, helped in qRT-PCR experiments and corrected the manuscript. DLS, JM, NV, HD and KPA have revised the manuscript, revised the figures, provided critical comments, helped in analysis and corrected the manuscript. All the authors read and approved the final manuscript.

Corresponding author

Correspondence to Channakeshavaiah Chikkaputtaiah.

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The authors declare that they have no conflict of interest.

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Debbarma, J., Saikia, B., Singha, D.L. et al. XSP10 and SlSAMT, Fusarium wilt disease responsive genes of tomato (Solanum lycopersicum L.) express tissue specifically and interact with each other at cytoplasm in vivo. Physiol Mol Biol Plants 27, 1559–1575 (2021). https://doi.org/10.1007/s12298-021-01025-y

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  • DOI: https://doi.org/10.1007/s12298-021-01025-y

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