NaCl-induced accumulation of glycinebetaine in four subtropical halophytes from Pakistan

被引：36

作者：

Khan, MA

Ungar, IA ^{[1
]}

Showalter, AM

Dewald, HD

机构：

[1] Brigham Young Univ, Dept Bot & Range Sci, Provo, UT 84602 USA

[2] Ohio Univ, Dept Environm & Plant Biol, Athens, OH 45701 USA

[3] Ohio Univ, Mol & Cellular Biol Program, Athens, OH 45701 USA

[4] Ohio Univ, Dept Chem, Athens, OH 45701 USA

来源：

PHYSIOLOGIA PLANTARUM | 1998年 / 102卷 / 04期

关键词：

Atriplex griffithii; compatible osmotica; glycinebetaine; halophyte; Halopyrum mucronatum; Haloxylon recurvum; NaCl; salt stress; Suaeda fruticosa;

D O I：

10.1034/j.1399-3054.1998.1020402.x

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Variation in both the total content and the concentration of glycinebetaine in response to increasing soil salinity was studied in the salt-secreting Atriplex griffithii Meg., the leaf succulent Suaeda fruticosa (L.) Forssk., the stem succulent Haloxylon recurvum Bunge ex Boiss. and the osmotically adjusting desert grass Halopyrum mucronatum (L.) Stapf. collected From a subtropical maritime desert in Pakistan. Glycinebetaine content (mmol kg(-1) dry weight) increased with increasing NaCl in Atriplex griffithii, Haloxylon recurvum and Halopyrum mucronatum, but peaked at 600 mM NaCl for Suaeda fruticosa and declined thereafter. Glycinebetaine concentration (mmol l(-1) tissue water) increased with increasing salinity in all four halophyte species and was sufficiently high to serve as an osmoticum in all cases.

引用

页码：487 / 492

页数：6

共 33 条

[1] Strategies for engineering water-stress tolerance in plants [J].