title: Molecular mechanisms of boron transport in plants: involvement of Arabidopsis NIP5;1 and NIP6;1.
abstract: Understanding of the molecular mechanisms of boron (B) transport has been greatly advanced in the last decade. BOR1, the first B transporter in living systems, was identified by forward genetics using Arabidopsis mutants. Genes similar to BOR1 have been reported to share different physiological roles in plants. NIPS;1, a member of aquaporins in Arabidopsis, was then identified as a boric acid channel gene responsible for the B uptake into roots. NIP6;1, the most similar gene to NIPS;1, encodes a B channel essential for B distribution to young leaves. In the present chapter, recent advancement of the understanding of molecular mechanisms of B transport and roles of NIP genes are discussed.
authors.affiliation: Biotechnology Research Center, The University of Tokyo, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan.
authors.forename: Kyoko
authors.initials: K
authors.lastname: Miwa
authors.forename: Mayuki
authors.initials: M
authors.lastname: Tanaka
authors.forename: Takehiro
authors.initials: T
authors.lastname: Kamiya
authors.forename: Toru
authors.initials: T
authors.lastname: Fujiwara
mesh_terms: D020346:Aquaporins / Q000235:genetics* / Q000378:metabolism; D017360:Arabidopsis / Q000235:genetics*; D029681:Arabidopsis Proteins / Q000235:genetics*; D001692:Biological Transport; D001895:Boron / Q000378:metabolism*; D004058:Diffusion; D026901:Membrane Transport Proteins / Q000235:genetics*; D008954:Models, Biological; D010368:Pectins / Q000378:metabolism; D018521:Plant Physiological Phenomena; D052584:Xylem / Q000378:metabolism
chemical_list: D020346:Aquaporins; D029681:Arabidopsis Proteins; D026901:Membrane Transport Proteins; C512214:NIP5;1 protein, Arabidopsis; C535126:NIP6;1 protein, Arabidopsis; C042491:rhamnogalacturonan I; D010368:Pectins; D001895:Boron