RRC ID 30747
著者 Ariga H, Katori T, Yoshihara R, Hase Y, Nozawa S, Narumi I, Iuchi S, Kobayashi M, Tezuka K, Sakata Y, Hayashi T, Taji T.
タイトル Arabidopsis sos1 mutant in a salt-tolerant accession revealed an importance of salt acclimation ability in plant salt tolerance.
ジャーナル Plant Signal Behav
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.
巻・号 8(7)
ページ e24779
公開日 2013-7-1
DOI 10.4161/psb.24779
PII 24779
PMID 23656872
PMC PMC3908940
MeSH Acclimatization* Arabidopsis / physiology* Arabidopsis Proteins / genetics* Base Sequence Molecular Sequence Data Mutation Salinity Salt Tolerance* Sodium Chloride / metabolism Sodium-Hydrogen Exchangers / genetics*
IF 1.671
引用数 7
リソース情報
シロイヌナズナ / 植物培養細胞・遺伝子 sja26400