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This review discusses the roles of phytohormones like auxin and ethylene in regulating root hair growth and development in plants, but it reports no new experimental results.

This study found that in Arabidopsis, the CLE14 peptide regulates root hair growth by promoting elongation, an effect that requires CLV2 and CRN proteins and involves ethylene signalling along with hydrogen peroxide and nitric oxide pathways.

This study found that in wild-type Arabidopsis plants, root hair growth is suppressed with increased nutrient availability, with RHD6 subfamily genes down-regulated and GTL1 and DF1 genes influencing root hair morphology under these conditions.

In this study, wild-type Arabidopsis thaliana demonstrated increased phosphorus acquisition and growth compared to root hair mutants under low-phosphorus conditions.

This study found that the zinc finger protein AtZP1 inhibits root hair initiation and elongation in Arabidopsis by suppressing key transcription factors involved in root hair development.