Characterization of endophytic Rahnella sp. JN6 from Polygonum pubescens and its potential in promoting growth and Cd, Pb, Zn uptake by Brassica napus

The hyperaccumulator Sedum plumbizincicola harbors metal-resistant endophytic bacteria that improve its phytoextraction capacity in multi-metal contaminated soil

“…SRA1 and Bacillus cereus SRA10 increased the amount of Ni extracted from soil, which may be due to their ability to produce maximum siderophores both in catechol and hydroxamate types (Ma et al, 2009). Besides, He et al (2013) reported that the addition of the metal-resistant endophyte Rahnella sp. JN6 to metal contaminated soils significantly increased the water soluble Cd, Pb and Zn by 4.73, 6.21 and 7.19 folds compared with the control, respectively.…”

“…It has been demonstrated that the elevated levels of metals in soil interfere with uptake of nutrients such as P and can lead to plant growth retardation. This deficiency can be compensated by the P-solubilizing ability of PGPE strains (He et al, 2013). Besides, most of the commonly known ACC deaminase and siderophore-producing bacteria can prevent the ethylene-induced inhibition of root elongation through hydrolytic cleavage of ACC and suppressing the ACC synthase activity (Belimov et al, 2009).…”

“…Similarly, the maximum increase (18%) in accumulation of Zn in plants was observed when plants were inoculated with strain E1S2. The increased metal uptake induced by endophytic bacteria can be attributed to their capability of solubilizing metals in the rhizosphere of the inoculated plants through bacterial metabolic activities or their interactions with host plants (He et al, 2013). The acidification (lowering of soil pH) of surroundings resulting from P solubilization may play a key role on the solubility and accumulation of heavy metals Ma et al, 2011a).…”

“…The application of the metal-resistant ACC utilizing endophytic bacteria not only effectively promoted the plant growth, but also increased the bioavailability of metals in the rhizosphere and consequently enhanced the uptake of Cd and Zn by S. plumbizincicola. Although PGPE have been used as bioinoculants in phytoremediation scenarios, most of the studies on their effects on plant growth and metal uptake have only been performed in sterile metal polluted soils or growth media (Ma et al, 2011a;He et al, 2013;Visioli et al, 2014;Zhu et al, 2014).…”

Screening and Identification of Heavy Metal-Tolerant Endophytic Fungi Lasiodiplodia Theobromae From Boswellia Ovalifoliolata an Endemic Plant of Tirumala Hills

“…Bioremediation offers most economical and promising option to treat heavy metal in contaminated sites [6]. Different microorganisms are able to reduce the stress placed on plants by the presence of heavy metals, increase the availability of metal for plant uptake and promote plant growth [7,8]. Endophytic fungi are intriguing microbes live inside the healthy plant tissues and exhibits excellent metal-binding capacity [9] and provide more advantages over bacterial bioaugmentation [10].…”