Characterization of Cu-tolerant bacteria and definition of their role in promotion of growth, Cu accumulation and reduction of Cu toxicity in Triticum aestivum L

Hai-ou, Wang; Xu, Ran; You, Lumeng; Zhong, Guangrong

doi:10.1016/j.ecoenv.2013.04.005

Cited by 33 publications

(7 citation statements)

References 39 publications

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“…SODs together with PODs form the first line of antioxidant defense against ROS (Ito-kuwa et al 1999 ; Veljovic-Jovanovic et al 2006 ). In the SOD-POD system, SODs first degrade O 2 −1 into O 2 and H 2 O 2 , and the latter is then degraded by POD into H 2 O and O 2 (Boscolo et al 2003 ; Wang et al 2013 ). CAT scavenges photorespiratory H 2 O 2 by a catalytic reaction of 2H 2 O 2 → O 2 + 2H 2 O (Willekens et al 1997 ).…”

Section: Discussionmentioning

confidence: 99%

Physiological characterization of maize tolerance to low dose of aluminum, highlighted by promoted leaf growth

Wang

Fan

Pan

et al. 2015

Planta

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Main conclusionEffects of a low aluminum (Al) dose were characterized. The Al supplement inhibited root growth but enhanced leaf growth in maize lines with different Al sensitivities.High levels of Al are phytotoxic especially in acidic soils. The beneficial effects of low Al levels have been reported in some plant species, but not in maize. Maize is relatively more sensitive to Al toxicity than other cereals. Seedlings, at the three leaf stage, of four Chinese maize foundation parent inbred lines with different Al tolerances, were exposed to complete Hoagland’s nutrient solution at pH 4.5 supplemented with 48 μM Al3+ under controlled growth conditions, and then the Al stress (AS) was removed. The leaf and root growth, root cell viability, superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), ions (K+, Ca++ and Mg++), photosynthetic rate and chlorophyll, protein and malondialdehyde contents in tissues were assayed. In conclusion, a low Al dose inhibits root growth but enhances leaf growth in maize. The Al-promoted leaf growth is likely a result of increased protein synthesis, a lowered Ca++ level, and the discharge of the growth-inhibitory factors. The Al-promoted leaf growth may be a ‘memory’ effect caused by the earlier AS in maize. Al causes cell wall rupture, and a loss of K+, Ca++ and Mg++ from root cells. CAT is an auxiliary antioxidant enzyme that works selectively with either SOD or POD against AS-related peroxidation, depending on the maize tissue. CAT is a major antioxidant enzyme responsible for root growth, but SOD is important for leaf growth during AS and after its removal. Our results contribute to understanding how low levels of Al affect maize and Al-resistant mechanisms in maize.

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Section: Discussionmentioning

confidence: 99%

Physiological characterization of maize tolerance to low dose of aluminum, highlighted by promoted leaf growth

Wang

Fan

Pan

et al. 2015

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“…ROS detoxification depends partly on enzymatic antioxidants 32 , which are usually catalase, catalase/peroxidases (KatGs), PODs, and SODs 33 34 35 . SODs together with PODs form the first line of antioxidant defense against ROS 36 , of which SODs degrade O 2 -1 into H 2 O 2 and various PODs then decompose H 2 O 2 into H 2 O and O 2 37 38 . In filamentous fungi, Fe/Mn-SOD is found exclusively in the mitochondria and Cu/Zn-SOD is predominant in the cytosol 39 .…”

Section: Discussionmentioning

confidence: 99%

“…The high Cu resistance follows the paths: (1) protein degradation, which produces nonenzymatic antioxidant of amino acids; (2) high expression of Atx1; (3) Cu delivery and distribution between multiple subunits of the mitochondrial CCO and/or between the innermembrane space and the innermembrane; (4) transport of SRPR-recognized NSPs to ER by the cargo proteins under Ras signaling; (5) pathways of carnitine, glycine betaine and choline that buffer free CoA and Acyl-CoA pool in the peroxisome; and (6) more active AS exerted mainly by PMSs rather than SFs positioned on the spliceosome pathway. The potential subcellular localization of the involved components were assumed by referring to the literature 4 6 7 15 32 33 34 35 37 38 39 44 45 46 47 56 61 62 64 65 66 67 69 70 . All the components are given an icon.…”

Section: Figurementioning

confidence: 99%

Paths and determinants for Penicillium janthinellum to resist low and high copper

Chen

Sun

et al. 2015

Sci Rep

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Copper (Cu) tolerance was well understood in fungi yeasts but not in filamentous fungi. Filamentous fungi are eukaryotes but unlike eukaryotic fungi yeasts, which are a collection of various fungi that are maybe classified into different taxa but all characterized by growth as filamentous hyphae cells and with a complex morphology. The current knowledge of Cu resistance of filamentous fungi is still fragmental and therefore needs to be bridged. In this study, we characterized Cu resistance of Penicillium janthinellum strain GXCR and its Cu-resistance-decreasing mutants (EC-6 and UC-8), and conducted sequencing of a total of 6 transcriptomes from wild-type GXCR and mutant EC-6 grown under control and external Cu. Taken all the results together, Cu effects on the basal metabolism were directed to solute transport by two superfamilies of solute carrier and major facilitator, the buffering free CoA and Acyl-CoA pool in the peroxisome, F-type H + -transporting ATPases-based ATP production, V-type H + -transporting ATPases-based transmembrane transport, protein degradation, and alternative splicing of pre-mRNAs. Roles of enzymatic and non-enzymatic antioxidants in resistance to low and high Cu were defined. The backbone paths, signaling systems, and determinants that involve resistance of filamentous fungi to high Cu were determined, discussed and outlined in a model.

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“…strain USTB-O grown under the inuence of Cu stress has also been reported. 82 3.6.3 Proline content and lipid peroxidation in metal stressed wheat foliage. Proline is reported to serve as an osmoprotectant which guards plants from the deleterious effects of ROS generated by plants under the inuence of environmental stresses like heavy metals, drought, salinity etc.…”

Section: Cellular Damage Metal Localization and Morphology Alteratiomentioning

confidence: 99%

Heavy metal mediated phytotoxic impact on winter wheat: oxidative stress and microbial management of toxicity byBacillus subtilisBM2

et al. 2019

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Characterization of Cu-tolerant bacteria and definition of their role in promotion of growth, Cu accumulation and reduction of Cu toxicity in Triticum aestivum L

Cited by 33 publications

References 39 publications

Physiological characterization of maize tolerance to low dose of aluminum, highlighted by promoted leaf growth

Physiological characterization of maize tolerance to low dose of aluminum, highlighted by promoted leaf growth

Paths and determinants for Penicillium janthinellum to resist low and high copper

Heavy metal mediated phytotoxic impact on winter wheat: oxidative stress and microbial management of toxicity byBacillus subtilisBM2

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