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Regulation of stress-induced inositol metabolism in plants: a phylogenetic search for conserved cis elements

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Abstract

Inositol and its’ metabolic derivatives such as galactinol, raffinose, methylated inositols etc. are well known significant osmoprotectants produced in response to various abiotic stresses in plants. The present work focuses on the importance of phylogenetic analysis in search of a presumptive ‘master switch’ involved in inducing a set of stress-responsive coregulated genes in the pathways involved in inositol synthesis and its further metabolism. It can be reasonably assumed that the entire network of genes induced under a particular stress is governed by a few common stress-responsive transcription factor binding sites or cis elements in their respective promoters. A phylogenetic analysis of such regulatory regions of the coregulated genes participating in entire inositol metabolic pathway throughout evolution, can form a novel approach in recognizing the conserved stress-regulatory signature(s) or ‘master switch(es)’ regulating this important pathway under the stress impact.

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Abbreviations

Ino1 or MIPS:

L-myo-inositol-1-phosphate synthase

IMT:

Inositol methyl transferase

GolS:

Galactinol synthase

RafS:

Raffinose synthase

StaS:

Stachyose synthase

PLC:

Phospholipase C

MIOX:

Myo-inositol oxygenase

IP6K:

Inositol hexakisphosphate kinase

CAREs:

Cis-acting regulatory elements

TF:

Transcription factor

TFBS:

Transcription factor binding site

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Acknowledgements

ALM is currently an INSA Senior Scientist, while PB was supported by Institutional Research Associate fellowship

Funding

No specific funds were utilized for this work.

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Contributions

ALM and PB conceptualized the idea primarily based on the previous work done in this laboratory and designed the outline of the review. PB conducted all the required supporting search, performed the bioinformatic analysis and wrote the draft manuscript. ALM reviewed and following thorough discussions finalized the same.

Corresponding author

Correspondence to Arun Lahiri Majumder.

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13562_2021_708_MOESM1_ESM.tif

eFP data showing the genes with high inducibility under abiotic stresses- salt, drought and cold (retrieved from BAR databases for Arabidopsis and rice). Data for Arabidopsis were based on 0, 3, 6, 12 and 24 hrs of treatment for shoot and root, separately. Rice data available were of 3hrs post treatment (TIF 920 kb)

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Basak, P., Majumder, A.L. Regulation of stress-induced inositol metabolism in plants: a phylogenetic search for conserved cis elements. J. Plant Biochem. Biotechnol. 30, 756–778 (2021). https://doi.org/10.1007/s13562-021-00708-7

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  • DOI: https://doi.org/10.1007/s13562-021-00708-7

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