Endophytic bacteria and their potential to enhance heavy metal phytoextraction

Rajkumar, M.; Ae, Noriharu; Freitas, Helena

doi:10.1016/j.chemosphere.2009.06.047

Cited by 386 publications

(170 citation statements)

References 78 publications

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“…Bacterial endophytes may interact in several ways with host plants to improve their growth through similar mechanisms described for Plant growth promoting rhizospheric bacteria (PGPR), including nitrogen fixation, phosphate solubilization, IAA production and the production of a siderophore (Glick et al 1995;Rajkumar et al 2009). This makes sense because most of the bacterial endophytes isolated from various plants can be considered to be facultatively endophytic and are capable of living outside plant tissues as rhizospheric bacteria (Di Fiori and Del Gallo 1995).…”

Section: Pgpe Of the Bacterial Isolatesmentioning

confidence: 99%

Characterization of endophytic bacteria associated with rose plant (Rosa damascena trigintipeta) during flowering stage and their plant growth promoting traits

El-Deeb

Bazaid

Gherbawy

et al. 2012

Journal of Plant Interactions

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Little is known about the bacterial communities associated with the rose plants inhabiting dry desert ecosystems. The aim of this study was to isolate and characterize endophytic bacteria from different organs of rose plant. Endophytic bacteria were observed in healthy roots, stems, leaves, and flowers of rose plant, with a significantly higher density in roots, followed by stems, leaves, and petals. A total of 38 bacterial endophytes were isolated and are closely related phylogenetically to Acetobacter, Acinetobacter, Methylococcus, Bacillus, Micrococcus, Planococcus by 16S rRNA sequence analysis. Six endophytic bacteria were found to produce IAA, solubilize Ca 3 (PO 4 ) 2 and produce siderophore. The six endophytic bacteria all had the capacity to produce hydrolytic enzyme such as cellulase, xylanase, pectinase, amylase, protease, lipase, and chitinase, but difference existed among these isolates.

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Section: Pgpe Of the Bacterial Isolatesmentioning

confidence: 99%

Characterization of endophytic bacteria associated with rose plant (Rosa damascena trigintipeta) during flowering stage and their plant growth promoting traits

El-Deeb

Bazaid

Gherbawy

et al. 2012

Journal of Plant Interactions

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“…Although many plant-associated bacteria have been demonstrated to have beneficial effects on their host, their importance is still underestimated. A better understanding of their growth-promoting effects could be exploited for sustainable growth of crops, biomass for biofuel production, and feedstock for industrial processes, even on metal contaminated land (Weyens et al 2009b;Rajkumar et al 2009b). Furthermore, plant-associated bacteria can be exploited to improve the efficiency of phytoremediation processes.…”

mentioning

confidence: 99%

Plants as extreme environments? Ni-resistant bacteria and Ni-hyperaccumulators of serpentine flora

2009

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During recent years there has been an increasing interest in the bacterial communities occurring in unusual, often extreme, environments. On serpentine outcrops around the world, a high diversity of plant species showing the peculiar features of metal hyperaccumulation is present. These metal hyperaccumulators have received much attention for their potential biotechnological exploitation in phytoremediation processes, but also as unusual, extreme habitats for the associated bacterial flora, which could reveal novel details concerning bacterial adaptation. This paper will briefly focus on the research topics that have been addressed to date on bacteria associated with serpentine plants and aims to provide a state of the art and to present possible future directions for research which could lead to new insights on microbial adaptation and evolution, and potentially applied in technologies for sustainable use and remediation of contaminated land.

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“…Endophytic bacteria present a key role on phytoremediation since it is able to enhance heavy metal pytoextraction (Rajkumar et al, 2009;Muehe et al, 2015). In this context, a higher density of endophytic bacteria of Methylobacterium genera can be explained by its heavy metal tolerance.…”

Section: Discussionmentioning

confidence: 99%

Endophytic bacteria isolated from ip mirim (Tecoma stans Bignoniaceae) and its application for plant growth promotion

Ferreira¹,

Francisco²,

Espósito³

et al. 2017

Afr. J. Microbiol. Res.

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Endophytes are usually protected from soil environment competitiveness and stress. However, the presence of heavy metals can negatively affect the structure and diversity of endophyte communities. The aim of the present study was evaluate the diversity of endophytic bacteria from ipê mirim (Tecoma stans Bignoniaceae) grown in an area of Atlantic rainforest contaminated with metals and evaluate the ability of these bacteria to promote plant growth and seed germination. Results show that endophytic bacterial density in plants was stable among sites with different level of metals; however, bacterial richness was lower in plants from sites with low level of metals. At least 28 genera were isolated, where Methylobacterium (21.32%), Bacillus (19.12%), Pseudomonas (11.03%) and Curtobacterium (7.35%) the dominant groups. Isolates were selected from Rhizobiales order and the capability of this dominant group in plant growth promotion was evaluated. Results showed that Methylobacterium spp. and Rhizobium sp. increased germination and improved seedling growth of tomato Santa Cruz Kada Gigante. Therefore, results show that the endophyte cultivable community is not influenced by the presence of low metal concentration, and plant growth promoter bacteria that can be used on tomato seedlings production were successfully selected and on future phytoremediation studies.

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Endophytic bacteria and their potential to enhance heavy metal phytoextraction

Cited by 386 publications

References 78 publications

Characterization of endophytic bacteria associated with rose plant (Rosa damascena trigintipeta) during flowering stage and their plant growth promoting traits

Characterization of endophytic bacteria associated with rose plant (Rosa damascena trigintipeta) during flowering stage and their plant growth promoting traits

Plants as extreme environments? Ni-resistant bacteria and Ni-hyperaccumulators of serpentine flora

Endophytic bacteria isolated from ip mirim (Tecoma stans Bignoniaceae) and its application for plant growth promotion

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