Regulation of Phytohormones on the Growth and Development of Plant Root Hair
March 2022
in “
Frontiers in plant science
”
TLDR Plant root hair growth is mainly controlled by hormones like auxin and ethylene, which promote growth, while others like brassinosteroid inhibit it.
This review discusses the regulatory roles of various phytohormones in the growth and development of plant root hairs, which are crucial for nutrient and water absorption and stress response. Auxin, ethylene (ETH), and cytokinin (CK) positively regulate root hair cell fate determination, initiation, and elongation, while brassinosteroid (BR) generally has a negative regulatory effect. Jasmonate (JA) and abscisic acid (ABA) also positively influence initiation and elongation, with gibberellin (GA) negatively affecting elongation. Phytohormones primarily regulate root hair growth by influencing the transcription of specific genes such as WEREWOLF (WER), GLABRA2 (GL2), CAPRICE (CPC), and HAIR DEFECTIVE 6 (RHD6). Auxin and ETH are particularly vital, with interactions from JA, ABA, SL, and BR further modulating root hair development.
