Proteus mirabilis alleviates zinc toxicity by preventing oxidative stress in maize (Zea mays) plants

Islam, Faisal; Yasmeen, Tahira; Riaz, Muhammad; Arif, Muhammad Saleem; Ali, Shafaqat; Raza, Syed Hammad

doi:10.1016/j.ecoenv.2014.08.020

Cited by 94 publications

(39 citation statements)

References 60 publications

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“…Results obtained in St Ni line are consistent with our previous observations of Ni-induced physiological disorders related to osmotic stress in D. jasminea (Wiszniewska et al 2018). Stable content of proline in Lt Ni line may be an indicator of effective control of osmotic homeostasis and may reflect reduced Ni toxicity during prolonged exposure (Zou et al 2013;Islam et al 2014).…”

Section: Other Components Involved In Acclimation To Respective Heavysupporting

confidence: 90%

In vitro acclimation to prolonged metallic stress is associated with modulation of antioxidant responses in a woody shrub Daphne jasminea

Wiszniewska

Muszyńska

Kołton

et al. 2019

Plant Cell Tiss Organ Cult

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The study aimed at distinguishing antioxidant responses conditioning acclimation status to metallic stress in a shoot culture of a woody plant Daphne jasminea. Growth, organogenesis, metal accumulation, oxidative stress level and antioxidant responses were compared in the long-term treated shoots (Lt lines) and short-term treated (St lines) with Cd, Ni and Pb in relation to control shoots. Growth rate and organogenic potential were higher in the long-term treated Lt Cd and Lt Pb lines than in respective short-term treated St lines. Lt Ni line proliferated less effectively than St Ni line, whereas biomass accretion was similar in both Ni lines. All heavy metal (HM)-exposed shoots suffered from oxidative stress, however, it was more severe in St than in Lt lines. In the long-term treated lines three major factors were associated with the acclimation status: activity of peroxidase (POD) and accumulation of anthocyanins and carotenoids. POD activity was 4-1.5-times higher in Lt lines than in the control one. Anthocyanin content nearly tripled, while carotenoid content doubled in Lt lines. Other elements of antioxidant system, CAT and SOD, glutathione, ascorbic acid and proline, complemented the action of the "major players" in long-term treated Lt lines depending on heavy metal type. Short-term treated lines responded by accumulation of proteins and a decline in catalase activity. The study demonstrated that long-term heavy metal treatment can be considered acclimation strategy, during which substantial modulation of the antioxidant system occurs. Due to orchestrated action of cytosolic POD, vacuolar anthocyanins and membrane-bound carotenoids HM toxicity could be counteracted in various cellular compartments. Key message Acclimation to heavy metal exposure in D. jasminea shoot cultures involves modulation of antioxidant activity and is conditioned by an orchestrated action of cellular peroxidases, vacuolar anthocyanins and membrane-bound carotenoids.

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Section: Other Components Involved In Acclimation To Respective Heavysupporting

confidence: 90%

In vitro acclimation to prolonged metallic stress is associated with modulation of antioxidant responses in a woody shrub Daphne jasminea

Wiszniewska

Muszyńska

Kołton

et al. 2019

Plant Cell Tiss Organ Cult

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“…Islam et al . [60] reported on a P. mirabilis strain highly resistant to zinc, found in agricultural field soil, irrigated with industrial effluents in Faisalabad City, Pakistan. The strain was able to block zinc absorption by maize ( Zea mays ) roots, reduce oxidative stress in the plant, and increase its tolerance to zinc, promoting maize growth in the presence of the heavy metal.…”

Section: Proteus In Bioremediation and Plant Growth Promotionmentioning

confidence: 99%

Significance and Roles of Proteus spp. Bacteria in Natural Environments

2016

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Proteus spp. bacteria were first described in 1885 by Gustav Hauser, who had revealed their feature of intensive swarming growth. Currently, the genus is divided into Proteus mirabilis, Proteus vulgaris, Proteus penneri, Proteus hauseri, and three unnamed genomospecies 4, 5, and 6 and consists of 80 O-antigenic serogroups. The bacteria are known to be human opportunistic pathogens, isolated from urine, wounds, and other clinical sources. It is postulated that intestines are a reservoir of these proteolytic organisms. Many wild and domestic animals may be hosts of Proteus spp. bacteria, which are commonly known to play a role of parasites or commensals. However, interesting examples of their symbiotic relationships with higher organisms have also been described. Proteus spp. bacteria present in soil or water habitats are often regarded as indicators of fecal pollution, posing a threat of poisoning when the contaminated water or seafood is consumed. The health risk may also be connected with drug-resistant strains sourcing from intestines. Positive aspects of the bacteria presence in water and soil are connected with exceptional features displayed by autochthonic Proteus spp. strains detected in these environments. These rods acquire various metabolic abilities allowing their adaptation to different environmental conditions, such as high concentrations of heavy metals or toxic substances, which may be exploited as sources of energy and nutrition by the bacteria. The Proteus spp. abilities to tolerate or utilize polluting compounds as well as promote plant growth provide a possibility of employing these microorganisms in bioremediation and environmental protection.

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“…Pro accumulation was surprisingly lowered in Zea mays inoculated with novel Zn-tolerant bacterial strain ZK1 of Proteus mirabilis (Islam et al, 2014). Though ZK1 improved the CAT, SOD, guaiacol peroxidase, and ascorbic acid activities, it lowered the Pro content in plant tissues, thus creating a negative correlation between Pro and heavy metal stress (Islam et al, 2014). In another experiment, pea plants were exposed to NaCl and/or NiCl 2 stress to investigate whether pure Pro or Pro enrichedleaf extract of Lolium perenne L. could effectively protect against phytotoxicity.…”

Section: Heavy Metal Toxicitymentioning

confidence: 99%

Metabolic and molecular-genetic regulation of proline signaling and itscross-talk with major effectors mediates abiotic stress tolerance in plants

Roychoudhury¹,

Banerjee²,

Lahiri³

2015

Turk J Bot

105

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Proline (Pro) accumulation is a common response of several plant species to combat abiotic stresses. Under stress conditions, Pro acts as an excellent compatible solute in the plant system, participating in the alleviation of stress sensitivity. Though the metabolic pathways associated with Pro are well studied, parts of its regulatory cascades are still not properly known. It has also been conjectured that epigenetic modifications regulate Pro metabolism during abiotic stress. Apart from Pro, the plant abiotic stress responses are essentially mediated by multiple effectors. Hence, proper analysis of the cross-talks of Pro with the other components of the abiotic stress response has turned out to be mandatory in order to design multistress-tolerant transgenic lines. Highlighting the relation between Pro and seed germination is also essential to understand the notion behind plant susceptibility and survival during stress. Generally, Pro has a universal mechanism to generate abiotic stress tolerance through stabilization of structural components, enzyme structures, and regulation of osmotic adjustments. The success achieved through recent transgenic approaches leading to more accumulation of Pro in the sink has also been focused on in the present review.

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Proteus mirabilis alleviates zinc toxicity by preventing oxidative stress in maize (Zea mays) plants

Cited by 94 publications

References 60 publications

In vitro acclimation to prolonged metallic stress is associated with modulation of antioxidant responses in a woody shrub Daphne jasminea

In vitro acclimation to prolonged metallic stress is associated with modulation of antioxidant responses in a woody shrub Daphne jasminea

Significance and Roles of Proteus spp. Bacteria in Natural Environments

Metabolic and molecular-genetic regulation of proline signaling and itscross-talk with major effectors mediates abiotic stress tolerance in plants

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