Salt tolerance of the reed plant Phragmites communis |
| |
Authors: | Toru Matoh Nobutoshi Matsushita Eiichi Takahashi |
| |
Affiliation: | Plant Nutrition Lab., Faculty of Agriculture, Kyoto Univ., Kyoto 606, Japan. |
| |
Abstract: | Reed plants ( Phragmites communis Trinius) were grown at NaCl concentrations up to 500 m M and their growth, mineral contents and leaf blade osmotic potential were determined. Addition of NaCl up to 300 m M did not affect growth significantly. Sucrose, Cl-and Na+ concentrations in the shoots increased with the salinity of the medium and the shoot water content decreased. K+ always contributed most to the leaf osmotic potential. Even in the presence of 250 m M NaCl in the rooting medium, the leaf blade contained only 50 mM Na+, suggesting that the plants have an efficient mechanism for Na+ exclusion. 22Na+ uptake experiments suggested that the retranslo-cation of absorbed Na+ from shoots to the rooting medium lowered the uptake of Na+. |
| |
Keywords: | Halophyte 22Na+ uptake osmotic adaptation Phragmites communis salt tolerance reed plants |
|
|