Division of Applied Life Science (BK21 Program); Plant Molecular Biology and Biotechnology Research Center (PMBBRC); Gyeongsang National University; Jinju, Korea.
Plant Signal Behav. 2013 Aug;8(8). doi: 10.4161/psb.24970. Epub 2013 May 15.
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.
通过正向遗传学方法，鉴定出一个formin 同源 1 基因（OsFH1）是调控水稻根毛发育的关键调节因子。利用三个独立的突变体，一个点突变和两个 T-DNA 插入，验证了 OsFH1 对根毛发育的表型效应。研究表明，OsFH1 是根毛伸长所必需的。然而，当根在溶液中浸没生长时，Osfh1 仅表现出根毛生长缺陷。为了了解 OsFH1 如何影响植物对根浸没的反应，研究了 Osfh1 根毛对缺氧、碳水化合物补充以及外源激素（生长素和乙烯）和养分（Fe 和 Pi）的生长反应。然而，这些处理都没有挽救 Osfhl1 根毛的生长缺陷。本研究表明，OsFH1 可能参与防止浸没引起的根毛生长抑制。
