Effects of K＋ on Na＋ uptake and accumulation in a wild Halophyte grass Suaeda maritime

摘要：

Limiting Na＋ uptake and accumulation in the cytosol is the key measure to improve plant salt tolerance ( Flowers, 2004).However, Na＋ uptake pathways in higher plants are not so clear by now.Wang et al.(2007) reported that two distinct low‐affinity Na＋ uptake pathways exist in S.maritima : Pathway 1 might be mediated by a high‐affinity K＋ transporter under 25 mM NaCl that is insensitive to TEA＋ or Cs＋, but sensitive to Ba2 ＋ and pathway 2 by an AKT1‐type channel under 150 mM NaCl that is sensitive to TEA＋, Cs＋, or Ba2 ＋.Here we reported that the turning‐point of external salt concentrations for the two pathways and the effects of K＋ on 22 Na＋ influx and accumulation in S.maritima.

关键词： K＋ transporters ２２ Na＋ influx Na＋ accumulation

作者: JinLin Zhang SuoMin Wang Timothy J.Flowers JianYi Cai

作者单位: School of Pastoral Agriculture Science and Technology,Key Lab of Grassland Agro-ecosystem,Ministry o School of Life Sciences,University of Sussex,Falmer,Brighton,SussexB N1 ９QG,UK

会议类型: 国际会议

会议名称: 2008世界草地与草原大会

会议地点: 呼和浩特

会议语种:英文

在线出版日期: 2008-06-29（万方平台首次上网日期，不代表论文的发表时间）