期刊
MARINE POLLUTION BULLETIN
卷 90, 期 1-2, 页码 150-159出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2014.11.002
关键词
Estuary restoration; Heavy metal contamination; Phytostabilisation; Plant growth promoting bacteria; Spartina maritima; Tinto River
资金
- Junta de Andalucia under MARISMA project [P11-RNM-7274MO]
- FPU Grant, Ministerio de Educacion, Cultura y Deporte, Spain [AP2012-1809]
Spartina maritima is a native endangered heavy metal rhizoaccumulator cordgrass naturally growing in southwest coasts of Spain, where is used as a biotool to rehabilitate degraded salt marshes. Fifteen bacterial strains were isolated from the rhizosphere of S. maritima growing in the estuary of the Tinto River, one of the most polluted areas in the world. A high proportion of bacteria were resistant towards several heavy metals. They also exhibited multiple plant growth promoting (PGP) properties, in the absence and the presence of Cu. Bacillus methylotrophicus SMT38, Bacillus aryabhattai SMT48, B. aryabhattai SMT50 and Bacillus licheniformis SMT51 were selected as the best performing strains. In a gnobiotic assay, inoculation of Medicago sativa seeds with the selected isolates induced higher root elongation. The inoculation of S. maritima with these indigenous metal-resistant PGP rhizobacteria could be an efficient method to increase plant adaptation and growth in contaminated estuaries during restoration programs. (C) 2014 Elsevier Ltd. All rights reserved.
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