Inoculation of Ni-Resistant Plant Growth Promoting Bacterium Psychrobacter sp. Strain SRS8 for the Improvement of Nickel Phytoextraction by Energy Crops
Inoculation of Ni-Resistant Plant Growth Promoting Bacterium Psychrobacter sp. Strain SRS8 for the Improvement of Nickel Phytoextraction by Energy Crops
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DOI：
10.1080/15226511003671403
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发表时间：
2010-09
影响因子：
3.7
通讯作者：
Ying Ma;M. Rajkumar;J. Vicente;H. Freitas
中科院分区：
文献类型：
--
作者：
Ying Ma;M. Rajkumar;J. Vicente;H. Freitas
本研究旨在阐明接种植物生长促生菌--冷杆菌的效果。SRS8对能源作物蓖麻和向日葵在人工镍污染土壤中生长和植物提取潜力的影响研究了镍胁迫下植物的毒害症状，表现为叶绿素、蛋白质含量、生长抑制和铁、磷浓度，并讨论了它们之间的可能关系。结果表明，PGPB SRS8能够促进两种植物的生长和镍的积累。此外，对植物生物量、叶绿素和蛋白质含量的刺激效应伴随着从土壤到植物对铁和磷同化的增加。此外，过氧化氢酶和过氧化物酶活性的诱导也参与了SRS8提高两种植物对镍胁迫的耐性的能力。结果表明，SRS8菌株在促进普通红豆杉和黄花菜的生长和植物提取效率方面具有重要作用，可用于金属污染场地的修复。
This study was conducted to elucidate effects of inoculating plant growth-promoting bacterium Psychrobacter sp. SRS8 on the growth and phytoextraction potential of energy crops Ricinus communis and Helianthus annuus in artificially Ni contaminated soils. The toxicity symptom in plants under Ni stress expressed as chlorophyll, protein content, growth inhibition, and Fe, P concentrations were studied, and the possible relationship among them were also discussed. The PGPB SRS8 was found capable of stimulating plant growth and Ni accumulation in both plant species. Further, the stimulation effect on plant biomass, chlorophyll, and protein content was concomitant with increased Fe and P assimilation from soil to plants. Further, the induction of catalase and peroxidase activities was also involved in the ability of SRS8 to increase the tolerance in both plant species under Ni stress. The findings suggest that strain SRS8 play an important role in promoting the growth and phytoextraction efficiency of R. communis and H. annuus, which may be used for remediation of metal contaminated sites.