Potassium Deficiency and Hormone Signalling in Plants.
Mishra S, Bisht D, Amtmann A, Srivastava AK, Pandey GK
Plant Signaling
Every time you water a struggling container plant that's yellowing despite regular feeding, potassium uptake — not just supply — may be the hidden bottleneck, and the hormone signals described here are exactly what your plant uses to compensate.
Potassium is like a key nutrient that plants need to stay healthy, but many soils don't have enough of it. Plants have evolved a chemical messaging system using hormones to tell their roots to search harder and absorb more potassium when supplies run low. This review pieced together evidence showing that two specific hormones act as the main coordinators of that emergency response.
Key Findings
Jasmonic acid and abscisic acid were identified via meta-analysis as the two dominant hormones controlling gene activity during potassium deficiency in plants.
Hormonal signaling networks regulate root architecture changes — such as longer or more branched roots — that help plants forage for scarce potassium in soil.
Despite growing research into potassium-use efficiency, few crop varieties with meaningfully improved potassium uptake have reached real-world agriculture, highlighting a gap between lab findings and field application.
chevron_right Technical Summary
Plants use hormone signals to cope with potassium shortages in soil, and two hormones — jasmonic acid and abscisic acid — play especially central roles. Understanding these signals could help breed crops that thrive with less potassium fertilizer.
Abstract Preview
Potassium (K or K⁺) is a vital macronutrient that influences numerous physiological processes related to plant physiology and development. Recently, there is a growing focus on enhancing K+-use eff...
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