Arabidopsis ADF8 and ADF11 Contribute to Root Hair Growth to Respond to Hormone and Environmental Signals

February 2026 in “ The Plant Journal ”

L Li, Lin Ma, Gui‐Min Yin, Yun‐Xia Chen, Y. e Liang Zhang, Qiang‐Nan Feng, Sha Li

actin-depolymerizing factors ADF8 ADF11 root hair growth auxin ethylene F-actin hormonal signaling RSL4 ARFs EIN3 actin root hair hormones

TLDR ADF8 and ADF11 help root hairs grow by responding to hormones and environmental signals.

The study investigates the role of Arabidopsis actin-depolymerizing factors ADF8 and ADF11 in root hair growth, highlighting their importance in responding to hormonal and environmental signals. ADF8 and ADF11, which are expressed in root hairs, are induced by auxin and ethylene. Mutants lacking these factors show reduced sensitivity to these hormones and fail to maintain the F-actin meshwork necessary for root hair growth. Additionally, ADF8/11 are involved in root hair elongation under low-phosphate and low-nitrogen conditions. The expression of ADF8/11 is regulated by transcription factors RSL4, auxin-responsive ARFs, and ethylene-responsive EIN3, establishing a direct link between hormonal signaling and F-actin dynamics in root hairs.

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Research cited in this study

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