Iva MCCARTHY-SUÁREZ
Hormone Signalling and Plant Plasticity Group. Instituto de Biología Celular y Molecular de Plantas (CSIC-Universidad Politécnica de Valencia). C/ Ingeniero Fausto Elio s/n (46022), Valencia – Spain

https://doi.org/10.47743/jpd.2021.28.1.886

Keywords: DELLAs, Gibberellins, root hair morphology, root hair number, root hair patterning.

Abstract: In spite of the role of gibberellins/DELLAs in leaf hair production, no investigations have assessed their function in the production of root hairs. To this aim, the effects of supra-physiological levels of GAs/DELLAs on the gene expression patterning of the root hair (CPC) and non-hair (GL2, EGL3 and WER) epidermal cell fate markers, and on the distribution, morphology and abundance of root hairs, were studied in root tips of 5-day-old A. thaliana seedlings. Results showed that excessive GAs/DELLAs misarranged the CPC, GL2, EGL3 and WER gene expression patterning and the location, shape and frequency of root hairs. However, when the gai-1 (GA-insensitive-1) DELLA mutant protein was specifically over-expressed at the root epidermis, no changes in the patterning or abundance of root hairs occurred. Thus, results suggest that, in A. thaliana seedlings, the GAs/DELLAs might regulate the patterning, morphology and abundance of root hairs from the sub-epidermal tissues of the root.

How to cite this article:
MCCARTHY-SUÁREZ I. 2021. Supra-physiological levels of gibberellins / DELLAs alter the patterning, morphology and abundance of root hairs in root tips of A. thaliana seedlings. J. Plant Develop. 28: 41-67.
https://doi.org/10.47743/jpd.2021.28.1.886

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