title: Arabidopsis sos1 mutant in a salt-tolerant accession revealed an importance of salt acclimation ability in plant salt tolerance.
abstract: An analysis of the salinity tolerance of 354 Arabidopsis thaliana accessions showed that some accessions were more tolerant to salt shock than the reference accession, Col-0, when transferred from 0 to 225 mM NaCl. In addition, several accessions, including Zu-0, showed marked acquired salt tolerance after exposure to moderate salt stress. It is likely therefore that Arabidopsis plants have at least two types of tolerance, salt shock tolerance and acquired salt tolerance. To evaluate a role of well-known salt shock tolerant gene SOS1 in acquired salt tolerance, we isolated a sos1 mutant from ion-beam-mutagenized Zu-0 seedlings. The mutant showed severe growth inhibition under salt shock stress owing to a single base deletion in the SOS1 gene and was even more salt sensitive than Col-0. Nevertheless, it was able to survive after acclimation on 100 mM NaCl for 7 d followed by 750 mM sorbitol for 20 d, whereas Col-0 became chlorotic under the same conditions. We propose that genes for salt acclimation ability are different from genes for salt shock tolerance and play an important role in the acquisition of salt or osmotic tolerance.
authors: Department of Bio-Science; Tokyo University of Agriculture; Setagaya, Tokyo, Japan.
authors: Hirotaka
authors: H
authors: Ariga
authors: Taku
authors: T
authors: Katori
authors: Ryouhei
authors: R
authors: Yoshihara
authors: Yoshihiro
authors: Y
authors: Hase
authors: Shigeki
authors: S
authors: Nozawa
authors: Issay
authors: I
authors: Narumi
authors: Satoshi
authors: S
authors: Iuchi
authors: Masatomo
authors: M
authors: Kobayashi
authors: Kenji
authors: K
authors: Tezuka
authors: Yoichi
authors: Y
authors: Sakata
authors: Takahisa
authors: T
authors: Hayashi
authors: Teruaki
authors: T
authors: Taji
mesh_terms: D000064:Acclimatization; D017360:Arabidopsis / Q000502:physiology*; D029681:Arabidopsis Proteins / Q000235:genetics*; D001483:Base Sequence; D008969:Molecular Sequence Data; D009154:Mutation; D054712:Salinity; D055049:Salt Tolerance; D012965:Sodium Chloride / Q000378:metabolism; D017923:Sodium-Hydrogen Exchangers / Q000235:genetics*
chemical_list: D029681:Arabidopsis Proteins; C477653:SOS1 protein, Arabidopsis; D017923:Sodium-Hydrogen Exchangers; D012965:Sodium Chloride
keywords: Arabidopsis; natural variation; salt acclimation; salt tolerance
references: Nature. 2010 Jun 3;465(7298):627-31
references: 20336072
references: Plant J. 2005 Jan;41(2):195-211
references: 15634197
references: Plant Cell. 2002 Aug;14(8):1675-90
references: 12172015
references: Proc Natl Acad Sci U S A. 2010 Mar 23;107(12):5669-74
references: 20212128
references: Plant J. 2003 Oct;36(2):229-39
references: 14535887
references: Plant Physiol. 2006 Apr;140(4):1297-305
references: 16500991
references: PLoS One. 2011;6(8):e22832
references: 21857956
references: PLoS Genet. 2010 Nov 11;6(11):e1001193
references: 21085628
references: Plant J. 1999 Mar;17(6):603-14
references: 10230060
references: Plant Cell. 1996 Apr;8(4):617-627
references: 12239394
references: Mutat Res. 2012 Mar 1;731(1-2):41-7
references: 22027091
references: Plant J. 2005 Dec;44(6):928-38
references: 16359386
references: Plant Physiol. 1996 Aug;111(4):1011-9
references: 8756493
references: PLoS Genet. 2006 Dec 1;2(12):e210
references: 17140289
references: Proc Natl Acad Sci U S A. 1998 Jun 23;95(13):7799-804
references: 9636231
references: Proc Natl Acad Sci U S A. 2000 Jun 6;97(12):6896-901
references: 10823923
references: Annu Rev Plant Biol. 2008;59:651-81
references: 18444910
references: Arch Biochem Biophys. 2008 Mar 15;471(2):146-58
references: 18241665
references: Plant Physiol. 1995 May;108(1):29-38
references: 12228451
references: Plant Physiol. 2007 Jan;143(1):251-62
references: 17085506
references: J Exp Bot. 2010 Feb;61(4):1125-38
references: 20080827
references: Plant Cell. 2009 Jul;21(7):1877-96
references: 19574434
references: Plant J. 2007 Mar;49(5):786-99
references: 17316173