Use of ratios in leaf tissues to determine effects of petroleum on salt exclusion in marine halophytes

1989 
Abstract The relationship between sediment hydrocarbon concentration and leaf Na K ratios has been examined in two marine halophytes, Rhizophora mangle and Spartina alterniflora . The plants examined were exposed to petroleum hydrocarbons in the field. Elevated Na K ratios were observed in the leaves of both species of halophytes. The degree of elevation of the Na K ratios was related to the concentration and state of weathering of petroleum in the sediments in which the plants were growing. The mechanism of damage appears to be similar in both species. Elevated Na K ratios appear to result from damage to root membranes.
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