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Related Experiment Video

Updated: Jun 4, 2026

A Simple Protocol for Mapping the Plant Root System Architecture Traits

A Simple Protocol for Mapping the Plant Root System Architecture Traits

Published on: February 10, 2023

Signaling network in sensing phosphate availability in plants.

Tzyy-Jen Chiou¹, Shu-I Lin

¹Agricultural Biotechnology Research Center, Academia Sinica, Taipei, Taiwan. tjchiou@gate.sinica.edu.tw

Annual Review of Plant Biology

|March 5, 2011

Summary

Plants utilize phosphate (Pi) signaling to manage nutrient deficiency. This review details how Pi, miR399, sugars, hormones, and transcription factors coordinate to regulate plant Pi uptake and homeostasis.

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Area of Science:

Plant Physiology
Molecular Biology
Nutrient Signaling

Background:

Plants require phosphate (Pi) for growth, but its environmental concentration is often limiting.
Plants have evolved sophisticated mechanisms to acquire, conserve, and remobilize internal Pi.
These adaptive responses are orchestrated by complex signaling networks involving local and systemic components.

Purpose of the Study:

To review current knowledge on plant phosphate (Pi) signaling pathways.
To elucidate the roles of various signaling molecules in Pi homeostasis.
To present hypotheses on novel signals and signaling network organization.

Main Methods:

Literature review of recent advances in plant Pi signaling.
Analysis of molecular components involved in Pi sensing and response.
Integration of data on systemic and local signaling mechanisms.

Main Results:

Phosphate (Pi) itself acts as a signal indicating its availability.
MicroRNA399 (miR399) and sugars function as systemic signals regulating root responses.
Hormones and transcription factors are key regulators integrating signals and mediating outputs.

Conclusions:

Plant Pi acquisition and homeostasis are controlled by an intricate signaling network.
Understanding this network is crucial for improving crop resilience in low-Pi environments.
Further research into novel signals and network coordination is warranted.