title: Formin homology 1 (OsFH1) regulates submergence-dependent root hair development in rice plants.
abstract: By using a forward genetic approach, a formin homology 1 gene (OsFH1) was identified as a critical regulator of rice root hair development. The phenotypic effect of OsFH1 on root hair development was verified by using three independent mutants, one point mutation and two T-DNA insertions. The study showed that OsFH1 is required for the elongation of root-hairs. However, Osfh1 exhibited growth defect of root hairs only when roots were grown submerged in solution. To understand how OsFH1 impinges on plant responses to root submergence, the growth responses of Osfh1 root hairs to anoxia, carbohydrate supplementation and exogenous hormones (auxin and ethylene) and nutrients (Fe and Pi) were examined. However, none of these treatments rescued the growth defects of Osfhl1 root hairs. This study demonstrates that OsFH1 could be involved in preventing submergence-induced inhibition of root hair growth.
authors.affiliation: Division of Applied Life Science (BK21 Program); Plant Molecular Biology and Biotechnology Research Center (PMBBRC); Gyeongsang National University; Jinju, Korea.
authors.forename: Jin
authors.initials: J
authors.lastname: Huang
authors.forename: Jingmiao
authors.initials: J
authors.lastname: Liu
authors.forename: Chang-Deok
authors.initials: CD
authors.lastname: Han
mesh_terms: D009154:Mutation / Q000235:genetics; D012275:Oryza / Q000166:cytology / Q000254:growth & development* / Q000378:metabolism*; D010641:Phenotype; D010940:Plant Proteins / Q000378:metabolism*; D018517:Plant Roots / Q000166:cytology / Q000254:growth & development* / Q000378:metabolism*; D014867:Water / Q000378:metabolism*
chemical_list: D010940:Plant Proteins; D014867:Water
keywords: development; formin homology 1 (OsFH1); rice; root hair; submergence