The role of plant-associated bacteria in the mobilization and phytoextraction of trace elements in contaminated soils
Angela Sessitsch,Melanie Kuffner,Petra Kidd,Jaco Vangronsveld,Walter W. Wenzel,Katharina Fallmann,Katharina Fallmann,Markus Puschenreiter +7 more
TLDR
The role of plant-associated bacteria to enhance trace element availability in the rhizosphere is reviewed and the kind of bacteria typically found in association with trace element – tolerating or – accumulating plants are reported and discussed to improve trace element uptake by plants and thus the efficiency and rate of phytoextraction.Abstract:
Phytoextraction makes use of trace element-accumulating plants that concentrate the pollutants in their tissues. Pollutants can be then removed by harvesting plants. The success of phytoextraction depends on trace element availability to the roots and the ability of the plant to intercept, take up, and accumulate trace elements in shoots. Current phytoextraction practises either employ hyperaccumulators or fast-growing high biomass plants; the phytoextraction process may be enhanced by soil amendments that increase trace element availability in the soil. This review will focus on the role of plant-associated bacteria to enhance trace element availability in the rhizosphere. We report on the kind of bacteria typically found in association with trace element – tolerating or – accumulating plants and discuss how they can contribute to improve trace element uptake by plants and thus the efficiency and rate of phytoextraction. This enhanced trace element uptake can be attributed to a microbial modification of the absorptive properties of the roots such as increasing the root length and surface area and numbers of root hairs, or by increasing the plant availability of trace elements in the rhizosphere and the subsequent translocation to shoots via beneficial effects on plant growth, trace element complexation and alleviation of phytotoxicity. An analysis of data from literature shows that effects of bacterial inoculation on phytoextraction efficiency are currently inconsistent. Some key processes in plant–bacteria interactions and colonization by inoculated strains still need to be unravelled more in detail to allow full-scale application of bacteria assisted phytoremediation of trace element contaminated soils.read more
Citations
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Phytoremediation using microbially mediated metal accumulation in Sorghum bicolor
TL;DR: It is shown that a careful examination of options of microbial determination of plant performance is a key element in providing a multielement remediation option for reclaiming land that has been anthropogenically contaminated with multiple heavy metal elements during mining operations.
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Enhancing the plants growth and arsenic uptake from soil using arsenite-oxidizing bacteria.
TL;DR: Soil bioaugmentation with M14 enables the application of native and commonly occurring plant species for enhancing the treatment of arsenic-contaminated soil and may constitute a valuable alternative both to the chemical and physical methods of arsenic removal from soil and to the biological ways based on the arsenic hyperaccumulating plants and/or the arsenic mobilizing bacteria.
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Integrating phytoremediation into treatment of pulp and paper industry wastewater: Field observations of native plants for the detoxification of metals and their potential as part of a multidisciplinary strategy
TL;DR: In this article, the use of native herbs for the removal of heavy metals from pulp and paper industry wastewater, with the view of applying them as part of a multidisciplinary approach for detoxification.
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Endophytic Burkholderia sp. strain PsJN Improves Plant Growth and Phytoremediation of Soil Irrigated with Textile Effluent
Muhammad Afzal,Ghulam Shabir,Razia Tahseen,Ejazul Islam,Samina Iqbal,Qaiser M. Khan,Zafar M. Khalid +6 more
TL;DR: In this paper, a study was conducted to determine whether the inoculation of plant growth-promoting bacteria to plants, vegetated in soil irrigated with textile effluent, influences plant biomass production, and soil remediation.
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New opportunities in plant microbiome engineering for increasing agricultural sustainability under stressful conditions
Muhammad Siddique Afridi,Muhammad Ammar Javed,Sher Ali,Flávio Henrique Vasconcelos de Medeiros,Baber Ali,Abdul Salam,Sumaira,Romina Alina Marc,Dalal Hussien M. Alkhalifah,Samy Selim,Gustavo Santoyo +10 more
TL;DR: Understanding the crucial role of plant associated microbial communities, it is proposed how the associated microbial actions could be enhanced to improve plant growth-promoting mechanisms, with a particular emphasis on plant beneficial fungi.
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