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Sailing in Complex Nutrient Signaling Networks: Where I Am, Where to Go and How to Go?

Zhenzhen Zhang,Zhaochen Zhong,Yan Xiong

Published 2023 in Molecular Plant

ABSTRACT

To ensure survival and promote growth, sessile plants have developed intricate internal signaling networks tailored in diverse cells and organs with both shared and specialized functions that respond to various internal and external cues. A fascinating question arises: how can a plant cell or organ diagnose the spatial and temporal information it is experiencing to know 'where I am', and then is able to make the accurate specific responses to decide 'where to go' and 'how to go', despite the absence of neuronal systems found in mammals. Drawing inspiration from recent comprehensive investigations into diverse nutrient signaling pathways in plants, this review focuses on the interactive nutrient signaling networks mediated by various nutrient-sensors and transducers. We assess and illustrate examples of how cells and organs exhibit specific responses to changing spatial and temporal information within these interactive plant nutrient networks. Additionally, we elucidate the underlying mechanisms by which plants employ PTM (posttranslational modification)-codes to integrate different upstream nutrient signals, thereby conferring response specificities to the signaling hub proteins. Furthermore, we discuss recent breakthrough studies that demonstrate the potential of modulating nutrient sensing and signaling as promising strategies to enhance crop yield, even with reduced fertilizer application.

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