中国水稻科学Issue(1)：35-44,10.DOI:10.3969/j.issn.1001-7216.2015.01.005
水稻 SUMO 化 E3连接酶 SIZ1调控缺磷条件下根的发育和根构型形成
OsSIZ1 Regulates the Development and Architecture of the Roots under Phosphate Starvation Conditions in Rice
摘要
Abstract
Plants cope with the low P environment by altering their root architecture.Here,we studied the role of SUMO E3 ligase SIZ1 on the root development and architecture,and the relationship among OsSIZ1 ,phosphate stress and auxin using ossiz1 mutants.Compared with wild-type (WT),the ossiz1 mutation inhibited the elongation of seminal roots and adventitious roots,promoted lateral roots formation and root hair proliferation.However,the response of the ossiz1 mutation was stronger than WT under Pi deficiency,namely,the trend of root elongation and the increase of the lateral root density and the root hair number of ossiz1 were more obvious relative to WT seedlings. This suggests that OsSIZ1 regulates the root architecture,and the effect is more obvious under Pi deficiency.The total P concentration of shoots and roots in ossiz1 is higher than WT,this suggests that OsSIZ1 negatively regulates phosphorus acquisition and use.And relative expression of OsYUCCA1 and OsP I N1a/1b in ossiz1 roots is markedly up-regulated compared with WT.This suggests that OsSIZ1 negatively regulates the auxin biosynthesis and polar auxin transport,which is weakened under Pi-deficient conditions.Together,these results suggest that OsSIZ1 regulates Pi starvation-induced root architecture remodeling possibly through the control of auxin patterning.关键词
水稻/磷/OsSIZ1/根构型Key words
rice/phosphate/OsSIZ1/root architecture分类
农业科技引用本文复制引用
周红敏,王化敦,孙瑞,裴文霞,吴学能,曹越,孙雅菲,徐国华,孙淑斌..水稻 SUMO 化 E3连接酶 SIZ1调控缺磷条件下根的发育和根构型形成[J].中国水稻科学,2015,(1):35-44,10.基金项目
国家自然科学基金资助项目(31172014) （31172014）
转基因生物新品种培育科技重大专项(2011ZX08009-003-005-010) （2011ZX08009-003-005-010）
