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Adaptation to Excess Salts in an Alkaline Soil Population of Cynodon Dactylon (L.) Pers.

P. S. Ramakrishnan and R. Nagpal
Journal of Ecology
Vol. 61, No. 2 (Jul., 1973), pp. 369-381
DOI: 10.2307/2259032
Stable URL: http://www.jstor.org/stable/2259032
Page Count: 13
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Adaptation to Excess Salts in an Alkaline Soil Population of Cynodon Dactylon (L.) Pers.
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Abstract

A differential response to excess salts was found in two populations of Cynodon dactylon (L.) Pers., one from an alkaline soil and one from a normal soil. In general, the growth of the population from alkaline soil was less depressed by excess salts. The leaves of the normal population were chlorotic with excess salts in the medium. Root production of the population from alkaline soil was not significantly influenced by excess salts whereas that of the normal population was markedly reduced. This must be important for absorption of both water and nutrients. Sodium, potassium, calcium and phosphorus contents of the shoots of the normal population all decreased markedly with high levels of excess salts in the medium but the contents of the population from alkaline soil either increased or decreased less markedly. The succulence of the shoot tended to increase more in the population from alkaline soil. The significance of these results is discussed.

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