沈阳农业大学学报2026，Vol.57Issue(3)：10-16,7.DOI:10.3969/j.issn.1000-1700.2026.03.002
OsDGL1介导的细胞壁鼠李糖代谢参与调控水稻对缺氮诱导的初生根伸长响应
Response of Primary Root Elongation Induced by Nitrogen Deficiency to Regulation Involving OsDGL1-Mediated Cell Wall Rhamnose Metabolism
摘要
Abstract
[Objective]Under nitrogen-deficient conditions,plants can enhance nitrogen uptake by promoting primary root growth;yet the molecular mechanisms underlying this adaptive response remain poorly understood.This study aimed to elucidate the intrinsic regulatory mechanisms of root morphological adaptation in rice in response to nitrogen deficiency,with a specific focus on clarifying the relationship between primary root growth regulation and nitrogen uptake efficiency.[Methods]Wild-type rice and the Osdgl1 mutant were used as experimental materials.Plants were subjected to either normal nitrogen supply or nitrogen-deficient conditions.Primary root growth phenotypes were systematically observed and measured.Concurrently,changes in the content of root cell wall components—including rhamnose,xylose,and cellulose,were analyzed.[Results]Nitrogen-deficient treatment significantly promoted primary root elongation of rice and partially restored the short-root phenotype of the Osdgl1 mutant.Genetic evidence indicated that OsDGL1 plays a crucial role in nitrogen deficiency-induced root growth.Further analysis revealed that changes in root length were primarily correlated with the content of rhamnose and xylose in the cell wall,but not with cellulose content.These findings suggest that rhamnose biosynthesis may serve an important function in this adaptive process.[Conclusion]OsDGL1 likely mediates the growth response of rice primary roots under nitrogen-deficient conditions by regulating the rhamnose biosynthesis pathway.This study provides novel insights and identifies future research directions for unraveling the molecular mechanisms through which nitrogen deficiency modulates root development in rice.关键词
缺氮/OsDGL1/初生根Key words
nitrogen deficiency/OsDGL1/primary root分类
农业科技引用本文复制引用
袁陈,张燕莉,赵明辉,马殿荣..OsDGL1介导的细胞壁鼠李糖代谢参与调控水稻对缺氮诱导的初生根伸长响应[J].沈阳农业大学学报,2026,57(3):10-16,7.基金项目
辽宁省科技重大专项项目(2024JH1/11700006-3) （2024JH1/11700006-3）
国家重点研发计划项目(2024YFD1501505) （2024YFD1501505）
