文献类型：期刊文献

英文题名：Sucrose Transporter AtSUC9 Mediated by a Low Sucrose Level is Involved in Arabidopsis Abiotic Stress Resistance by Regulating Sucrose Distribution and ABA Accumulation

作者：Jia, Wanqiu[1] Zhang, Lijun[1] Wu, Di[1] Liu, Shan[1] Gong, Xue[1] Cui, Zhenhai[1] Cui, Na[1] Cao, Huiying[1] Rao, Longbing[2] Wang, Che[1,3,4]

第一作者：Jia, Wanqiu

通信作者：Wang, C[1]

机构：[1]Shenyang Agr Univ, Coll Biol Sci & Technol, Shenyang 110161, Peoples R China;[2]Chinese Acad Forestry, Res Inst Subtrop Forestry, Hangzhou, Zhejiang, Peoples R China;[3]Shenyang Agr Univ, Minist Agr, Key Lab Northeast Rice Biol & Breeding, Shenyang 110161, Peoples R China;[4]Shenyang Agr Univ, Minist Educ, Rice Res Inst, Key Lab Northern Japon Rice Genet & Breeding, Shenyang 110161, Peoples R China

年份：2015

卷号：56

期号：8

起止页码：1574-1587

外文期刊名：PLANT AND CELL PHYSIOLOGY

收录：;Scopus(收录号：2-s2.0-84939550581);WOS:【SCI-EXPANDED(收录号:WOS:000359649400010)】；

基金：This research was supported by the National Natural Science Foundation of China [Nos. 31070157, 31170232, 30870190 and 31000673]; Doctoral Foundation of the Ministry of Education of the People's Republic of China [200801570005]; the Excellent Talents Foundation of Liaoning Province [No. LJQ2013073]; the China Postdoctoral Science Foundation [Nos. 20110490145 and 2012T50253]; the Opening Project of State Key Laboratory of China Agricultural University; the Opening Project of State Key Laboratory of Shenyang Agricultural University.

语种：英文

外文关键词：ABA; Abiotic stress; AtSUC9; Low levels of Suc; Suc transporter

摘要：Sucrose (Suc) transporters (SUCs or SUTs) are important regulators in plant growth and stress tolerance. However, the mechanism of SUCs in plant abiotic stress resistance remains to be dietermined. Here, we found that AtSUC9 expression was induced by abiotic stress, including salt, osmotic and cold stress conditions. Disruption of AtSUC9 led to sensitive responses to abiotic stress during seed germination and seedling growth. Further analyses indicated that the sensitivity phenotype of Atsuc9 mutants resulted from higher Suc content in shoots and lower Suc content in roots, as compared with that in wild-type (WT) plants. In addition, we found that the expression of AtSUC9 is induced in particular by low levels of exogenous and endogenous Suc, and deletion of AtSUC9 affected the expression of the low Suc level-responsive genes. AtSUC9 also showed an obvious response to treatments with low concentrations of exogenous Suc during seed germination, seedling growth and Suc distribution, and Atsuc9 mutants hardly grew in abiotic stress treatments without exogenous Suc. Moreover, our results illustrated not only that deletion of AtSUC9 blocks abiotic stress-inducible ABA accumulation but also that Atsuc9 mutants had a lower content of endogenous ABA in stress conditions than in normal conditions. Deletion of AtSUC9 also inhibited the expression of many ABA-inducible genes (SnRk2.2/3/6, ABF2/3/4, ABI1/3/4, RD29A, KIN1 and KIN2). These results indicate that AtSUC9 is induced in particular by low Suc levels then mediates the balance of Suc distribution and promotes ABA accumulation to enhance Arabidopsis abiotic stress resistance.