ArticleProceedings of the National Academy of Sciences of the United States of America2025
Foraging for water by MIZ1-mediated antagonism between root gravitropism and hydrotropism.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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Who cites it
7 citing papers in PubMed.
- Model Systems for Investigating Root Responses to Localized Water Availability.Methods in molecular biology (Clifton, N.J.) · 2027Article
- Genotypic Variation in Maize Root Hydrotropism and Its Association with Shoot Growth and Water Use Efficiency Under Partial Root-Zone Drying.Plants (Basel, Switzerland) · 2026Article
- Review
- Molecular Mechanisms and Experimental Strategies for Understanding Plant Drought Response.Plants (Basel, Switzerland) · 2026Review
- Intracellular MIZU-KUSSEI1 movement and hydrotropism in Arabidopsis require F-actin organization.Plant physiology · 2025Article
- Antagonistic SnRK2 and PID kinases' action on auxin transport-mediated root gravitropism.Proceedings of the National Academy of Sciences of the United States of America · 2025Article
- Water as a Compass: Hydrostimulation-Triggered Aerial Root Growth in Phalaenopsis aphrodite.Physiologia plantarumArticle
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Authors and funding
6 authors.
Funding
Abstract
Root system integrates multiple environmental cues, chiefly gravity and soil humidity, to anchor plants in soil and forage for water. While the mechanism of auxin-mediated root gravitropism is comparably well-understood, the root's capability to grow toward moist soil for water uptake and drought avoidance, termed root hydrotropism, remains largely mysterious. Here, we provide key insights into the mechanism of hydrotropic growth and assign a role to the master regulator of hydrotropism, MIZU-KUSSEI 1 (MIZ1). We show that efficient hydrotropism requires the attenuation of antagonistically acting gravitropism, which is inhibited under drought conditions. Drought stress interferes with subcellular trafficking and the lateral mobility of PIN auxin transporters, which are polarly localized at the root cell plasma membranes. This leads to defects in PIN2 polarity and gravity-induced polarization of PIN3, ultimately inhibiting gravity-induced auxin redistribution and root bending. The
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