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Effects of Indole-3-Acetic Acid (IAA), a Plant Hormone, on the Ryegrass Yield and the Removal of Fluoranthene from Soil.
- Source :
-
International journal of phytoremediation [Int J Phytoremediation] 2015; Vol. 17 (1-6), pp. 422-8. - Publication Year :
- 2015
-
Abstract
- A soil culture experiment was conducted to determine whether a plant hormone, indole-3-acetic acid (IAA), could influence fluoranthene (Flu) removal from soil. Four treatments were utilized: (i) unplanted soil (CK), (ii) soil planted with ryegrass (P), (iii) soil planted with ryegrass and treated with 0.24 mg kg(-1) IAA (P+0.24), (iv) soil planted with ryegrass and treated with 2.4 mg kg(-1) IAA (P+2.4). The Flu initial concentration was 200 mg kg(-1). After 3 months, the percentage of Flu removal and plant root biomass were significantly increased under the P+2.4 and the removal rate was 35.68%. The total Flu content in plants was higher than that in the other treatments. The Flu concentration was significantly increased in the shoots, but not significantly altered in the roots. The highest translocation factor was observed in the P+2.4. Increase in number of bacteria, actinomycetes and fungi were observed in the planted treatments, and the amount of fungi was significantly increased in P+2.4. Flu removal was related to the Flu in ryegrass, and was insignificantly correlated with the stimulation of soil microflora, which suggesting that IAA may work mainly on improving plant growth, the Flu uptake, and eventually leading to enhanced remediation of Flu polluted soil.
- Subjects :
- Biodegradation, Environmental
Environmental Restoration and Remediation instrumentation
Fluorenes analysis
Lolium chemistry
Lolium growth & development
Soil Pollutants analysis
Environmental Restoration and Remediation methods
Fluorenes metabolism
Indoleacetic Acids metabolism
Lolium metabolism
Plant Growth Regulators metabolism
Soil Pollutants metabolism
Subjects
Details
- Language :
- English
- ISSN :
- 1522-6514
- Volume :
- 17
- Issue :
- 1-6
- Database :
- MEDLINE
- Journal :
- International journal of phytoremediation
- Publication Type :
- Academic Journal
- Accession number :
- 25495932
- Full Text :
- https://doi.org/10.1080/15226514.2014.910172