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Potassium Deficiency and Hormone Signalling in Plants.

Shefali Mishra¹, Diksha Bisht², Anna Amtmann³

¹Nuclear Agricultural Biotechnology Division, Bhabha Atomic Research Centre, Mumbai, India.

Plant, Cell & Environment

|September 18, 2025

Summary

This summary is machine-generated.

Plant hormone signaling is key to improving potassium use efficiency (KUE) in crops, especially in low-potassium soils. Understanding this crosstalk is vital for enhancing plant growth and global food security.

Keywords:

K+‐use efficiency hormones jasmonic acid meta analysis stress signalling

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Area of Science:

Plant Physiology
Nutrient Management
Molecular Biology

Background:

Potassium (K⁺) is an essential macronutrient for plant growth and development.
Enhancing potassium use efficiency (KUE) is critical for crop production in potassium-deficient soils.
Current strategies targeting K⁺ sensing and signaling have yielded limited success in developing high-KUE crops.

Purpose of the Study:

To review the role of hormonal signaling in plant responses to potassium deficiency.
To integrate evidence on K⁺-hormone signaling crosstalk and its effects on plant physiology.
To provide a framework for advancing KUE research.

Main Methods:

Literature review integrating evidence on K⁺-hormone signaling crosstalk.
Meta-analysis of hormonal roles in K⁺ deficiency responses.
Assessment of transcriptional changes mediated by hormones.

Main Results:

Hormonal signaling pathways significantly regulate plant responses to potassium deficiency.
K⁺-hormone crosstalk influences root system architecture, K⁺ uptake, and stress resilience.
Jasmonic acid and abscisic acid play central roles in mediating transcriptional changes during K⁺ deficiency.

Conclusions:

K⁺-hormone signaling crosstalk is a crucial mechanism in plant adaptation to low potassium conditions.
Understanding this crosstalk offers novel strategies for developing crops with improved KUE.
This research framework can contribute to addressing global food security challenges.