Abstract
The salt marsh cord grass,Spartina alterniflora Loisel., occurs in markedly distinct short and tall growth forms. Both forms have the same number of chromosomes, although polyploidy is well established in the genus. Previous studies have shown that height is primarily affected by nitrate availability and environmental stresses such as increased soluble salt concentrations. These studies have shown that, within a marsh, height differences cannot be attributed to genetic, chromosomal differences or electrophoretic banding.
However, more subtle genetic differences may be involved. Other studies suggest that between marshes,S. alterniflora, in response to a latitudinal gradient on the Atlantic coast, has evolved ecotypes differing in height, color and flowering period. This review paper points out that plant height inS. alterniflora may be determined by a combination of environmental and genetic factors.
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Anderson, C.M., Treshow, M. A review of environmental and genetic factors that affect height inSpartina alterniflora loisel. (Salt marsh cord grass). Estuaries 3, 168–176 (1980). https://doi.org/10.2307/1352066
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DOI: https://doi.org/10.2307/1352066