期刊
NEW PHYTOLOGIST
卷 213, 期 1, 页码 314-323出版社
WILEY
DOI: 10.1111/nph.14160
关键词
Arabidopsis thaliana; basic helix-loop-helix transcription factors; Oryza sativa; rice; root hair; ROOT HAIR DEFECTIVE-SIX LIKE (RSL) class I genes; roots
资金
- Oxford Martin School
- European Research Council [EVO500, 25028]
- Biotechnology and Biological Research Council [BBG0198941]
- Next-Generation BioGreen21 Program, Rural Development Administration, Republic of Korea [PJ011146, PJ011039]
- Biotechnology and Biological Sciences Research Council [BB/G019894/2] Funding Source: researchfish
- BBSRC [BB/G019894/2] Funding Source: UKRI
Root hairs are filamentous protuberances from superficial cells of plant roots that are critical for nutrient uptake. Genes encoding ROOT HAIR DEFECTIVE-SIX LIKE (RSL) class I basic helix-loop-helix proteins are expressed in future root hair cells (trichoblasts) of the Arabidopsis thaliana root where they positively regulate root hair cell development. We characterized the function of class I genes in Oryza sativa root development. We show that there are three RSL class I genes in O. sativa and that each is expressed in developing root hair cells. Reduction of RSL class I function results in the development of shorter root hairs than in wild-type. Ectopic overexpression results in the development of ectopic root hair cells. These data suggest that expression of individual RSL class I proteins is sufficient for root hair development in the cereal O. sativa (rice). Therefore RSL class I genes have been conserved since O. sativa and A. thaliana last shared a common ancestor. However, given that RSL class I genes are not sufficient for root hair development in A. thaliana, it suggests that there are differences in the mechanisms repressing RSL class I gene activity between members of the Poaceae and Brassicaceae.
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