title: OsSNDP1, a Sec14-nodulin domain-containing protein, plays a critical role in root hair elongation in rice.
abstract: Rice is cultivated in water-logged paddy lands. Thus, rice root hairs on the epidermal layers are exposed to a different redox status of nitrogen species, organic acids, and metal ions than root hairs growing in drained soil. To identify genes that play an important role in root hair growth, a forward genetics approach was used to screen for short-root-hair mutants. A short-root-hair mutant was identified and isolated by using map-based cloning and sequencing. The mutation arose from a single amino acid substitution of OsSNDP1 (Oryza sativa Sec14-nodulin domain protein), which shows high sequence homology with Arabidopsis COW1/AtSFH1 and encodes a phosphatidylinositol transfer protein (PITP). By performing complementation assays with Atsfh1 mutants, we demonstrated that OsSNDP1 is involved in growth of root hairs. Cryo-scanning electron microscopy was utilized to further characterize the effect of the Ossndp1 mutation on root hair morphology. Aberrant morphogenesis was detected in root hair elongation and maturation zones. Many root hairs were branched and showed irregular shapes due to bulged nodes. Many epidermal cells also produced dome-shaped root hairs, which indicated that root hair elongation ceased at an early stage. These studies showed that PITP-mediated phospholipid signaling and metabolism is critical for root hair elongation in rice.
authors: Division of Applied Life Science (BK21 Program), Plant Molecular Biology and Biotechnology Research Center (PMBBRC), Gyeongsang National University, Jinju 660-701, Korea.
authors: Jin
authors: J
authors: Huang
authors: Chul Min
authors: CM
authors: Kim
authors: Yuan-hu
authors: YH
authors: Xuan
authors: Soon Ju
authors: SJ
authors: Park
authors: Hai Long
authors: HL
authors: Piao
authors: Byoung Il
authors: BI
authors: Je
authors: Jingmiao
authors: J
authors: Liu
authors: Tae Ho
authors: TH
authors: Kim
authors: Bo-Kyeong
authors: BK
authors: Kim
authors: Chang-Deok
authors: CD
authors: Han
mesh_terms: D000595:Amino Acid Sequence; D017360:Arabidopsis / Q000235:genetics; D001483:Base Sequence; D016009:Chi-Square Distribution; D020090:Chromosome Segregation; D003001:Cloning, Molecular; D020869:Gene Expression Profiling; D018506:Gene Expression Regulation, Plant; D005816:Genetic Complementation Test; D008565:Membrane Proteins / Q000737:chemistry*; D008969:Molecular Sequence Data; D009154:Mutation / Q000235:genetics; D012275:Oryza / Q000235:genetics / Q000254:growth & development* / Q000378:metabolism* / Q000648:ultrastructure; D010641:Phenotype; D010940:Plant Proteins / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism*; D018517:Plant Roots / Q000033:anatomy & histology / Q000166:cytology / Q000254:growth & development* / Q000648:ultrastructure; D018520:Plant Shoots / Q000033:anatomy & histology / Q000378:metabolism; D030821:Plants, Genetically Modified; D017434:Protein Structure, Tertiary; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D016415:Sequence Alignment
chemical_list: D008565:Membrane Proteins; D010940:Plant Proteins; D012333:RNA, Messenger; C045625:nodulin