Potential for Accelerated Bioremediation and Restoration of Oil-Impacted Marshes Through the Selection of Superior Oil-Tolerant Vegetation
2001-07-30
org.kosen.entty.User@4baff3a4
강지훈(kosen1)
발행일
2000/05/01
첨부파일
We assessed the feasibility of identifying superior oil-tolerant genotypes of Spartina patens and Spartina alterniflora, dominant brackish and salt marsh grasses, respectively. Ten genotypes each of S. patens and S. alterniflora wre established in a uniform soil that was oiled with South Louisiana crude oil at a rate of 5 L oil M-2 for S. patens and 8 L oil M-2 for S. alterniflora.
Both species displayed significant intraspecific variation to oiling in a number of plant growth response variables. In each species factor analysis revealed that three superior, oil-tolerant genotypes characteristically displayed less tissue death, maintained higher plant productivity, and demonstrated a greater ability to successfully produce new shoots through the oiled soil. Analysis of oil-degradation factor scores in S. patens further revealed that tow of the three oil-tolerant genotypes demonstrated significantly greater oil-degradation potential than other genotypes. This study has shown that there is a tremendous amount of natural genetic variation in oil tolerance in Gulf Coast populations of S. patens and S. alterniflora that may potentially be explited in wetland rehabilitation (restoration and creation) and the bioremediation (phytoremediation) of oiled brackish and salt marshes.
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