SALT TOLERANCE OF THE REED PLANT PHRAGMITES-COMMUNIS
SALT TOLERANCE OF THE REED PLANT PHRAGMITES-COMMUNIS
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DOI：
10.1111/j.1399-3054.1988.tb06615.x
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发表时间：
1988-01-01
影响因子：
6.4
通讯作者：
TAKAHASHI, E
中科院分区：
文献类型：
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作者：
MATOH, T;MATSUSHITA, N;TAKAHASHI, E
芦苇植物（芦苇communis Trinius）生长在NaCl浓度高达500 mM和它们的生长，矿物质含量和叶片渗透势进行了测定。添加NaCl至300 mM并不影响生长显着。地上部蔗糖、Cl-和Na+浓度随培养基盐度的增加而增加，地上部含水量随盐度的降低而降低。K+对叶片渗透势的贡献最大。即使在生根培养基中存在250 mM NaCl的情况下，叶片也仅含有50 mM Na+，这表明植物具有有效的Na+排斥机制。22 Na+吸收实验表明，吸收的Na+从地上部向生根培养基的再转运降低了Na+的吸收。
Reed plants (Phragmites communis Trinius) were grown at NaCl concentrations up to 500 mM and their growth, mineral contents and leaf blade osmotic potential were determined. Addition of NaCl up to 300 mM 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 mM 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 retranslocation of absorbed Na+ from shoots to the rooting medium lowered the uptake of Na+.