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Two-component signaling system in plants: interaction network and specificity in response to stress and hormones

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Abstract

Plants are exposed to various environmental challenges that can hamper their growth, development, and productivity. Being sedentary, plants cannot escape from these unfavorable environmental conditions and have evolved various signaling cascades to endure them. The two-component signaling (TCS) system is one such essential signaling circuitry present in plants regulating responses against multiple abiotic and biotic stresses. It is among the most ancient and evolutionary conserved signaling pathways in plants, which include membrane-bound histidine kinases (HKs), cytoplasmic histidine phosphotransfer proteins (Hpts), and nuclear or cytoplasmic response regulators (RRs). At the same time, TCS also involved in many signaling circuitries operative in plants in response to diverse hormones. These plant growth hormones play a significant role in diverse physiological and developmental processes, and their contribution to plant stress responses is coming up in a big way. Therefore, it is intriguing to know how TCS and various plant growth regulators, along with the key transcription factors, directly or indirectly control the responses of plants towards diverse stresses. The present review attempts to explore this relationship, hoping that this knowledge will contribute towards developing crop plants with enhanced climate resilience.

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Acknowledgements

DS acknowledges the Senior research fellowship received from DBT. Research grants received to the laboratory from the Department of Biotechnology, Department of Science and Technology, Government of India are duly acknowledged.

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DS and AP conceptualized and wrote the manuscript. All the authors edited and approved the manuscript.

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Correspondence to Ashwani Pareek.

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The authors declare that they have no conflict of interest.

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Communicated by Aryadeep Roychoudhury.

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Singh, D., Singla-Pareek, S.L. & Pareek, A. Two-component signaling system in plants: interaction network and specificity in response to stress and hormones. Plant Cell Rep 40, 2037–2046 (2021). https://doi.org/10.1007/s00299-021-02727-z

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  • DOI: https://doi.org/10.1007/s00299-021-02727-z

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