Ionic and water relations of Sesuvium portulacastrum (L.)

被引：0
|
作者：
Moseki, B. [1 ]
Buru, J. C. [1 ]
机构：
[1] Univ Botswana, Dept Biol Sci, Gaborone, Botswana
来源：
SCIENTIFIC RESEARCH AND ESSAYS | 2010年 / 5卷 / 01期
关键词：
S; portulacastrum; halophyte; proline; salinity; MARITIMA L DUM; SALT TOLERANCE; FREE PROLINE; HALOPHYTE; SALINITY;
D O I：
暂无
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
The aim of this study was to assess the growth response of Sesuvium portulacastrum (L.) (a halophyte) to various NaCl concentrations and hence determine how it is adapted to grow optimally under saline conditions. S. portulacastrum was grown hydroponically in various NaCl concentrations (that is, 0, 100, 200, 400 and 600 mol m(-3) NaCl). It was found to exhibit a growth pattern typical of dicotyledonous halophytes. It attained maximal growth at 200 mol m(-3) NaCl concentration in hydroponic cultures. It accumulated large concentrations of Na+ and Cl-with the leaves having the highest ion content. These ions are believed to be sequestered in the vacuole. S. portulacastrum also accumulated proline in high concentrations and this proline appeared to adjust the cytoplasmic ion concentration to balance that of the vacuole.
引用
收藏
页码：35 / 40
页数：6
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