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Cieśliński, G.; Rees, K. C. J. Van; Szmigielska, Anna M.; Krishnamurti, G. S. R.; Huang, P. M.

doi:10.1023/a:1004325817420

Cited by 237 publications

(26 citation statements)

References 41 publications

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“…Low molecular weight organic acids have been implicated to be associated with Cd stress in case of plants such as wheat (Cieslinski et al 1998), tobacco and sunflower (Chiang et al 2006) and maize (Han et al 2006). Present study demonstrates that exogenous amendment of organic acids protects mung bean plants against the toxic effects of Cd.…”

Section: Discussionmentioning

confidence: 54%

“…disturbs almost all physiological processes of plants, for instance, it reduced rate of photosynthesis, chlorosis, growth inhibition, changed protein and amino acid content, increased protease activity, oxidative stress and senescence (Baszynski et al 1980;Hsu and Kao 2003;Somashekaraiah et al 1992). Role of LMWOAs for Cd resistance has been implicated in case of plants such as wheat, tobacco and sunflower, which have been shown to exude organic acids upon exposure to Cd (Chiang et al 2006;Cieslinski et al 1998).…”

Section: Introductionmentioning

confidence: 99%

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Amelioration of phytotoxic effects of Cd on mung bean seedlings by gluconic acid secreting rhizobacterium Enterobacter asburiae PSI3 and implication of role of organic acid

Kavita

Shukla

Archana

2008

World J Microbiol Biotechnol

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Mung bean seedlings inoculated withEnterobacter asburiae PSI3, a gluconic acid-producing rhizosphere isolate, enhanced plant growth in the presence of phytotoxic levels of Cd 2? in gnotobiotic pot experiments as compared to the uninoculated Cd-treated plants. Addition of organic acids to Cd-stressed seedlings promoted root elongation. Hematoxylin competition assays showed that organic acids could displace Cd 2? from the Cd 2? : hematoxylin complex in the same order of effectiveness as was found for restoration of root net elongation viz. oxalate [ malate [ succinate while gluconate was effective at higher concentrations. Root associated Cd 2? , assessed by hematoxylin staining of roots was found to be reduced when roots were treated with organic acid. Cd stress increased antioxidant enzymes such as peroxidase and superoxide dismutase in mung bean roots while organic acid treatment suppressed the up-regulation of these enzymes by Cd.

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Section: Discussionmentioning

confidence: 54%

Section: Introductionmentioning

confidence: 99%

Amelioration of phytotoxic effects of Cd on mung bean seedlings by gluconic acid secreting rhizobacterium Enterobacter asburiae PSI3 and implication of role of organic acid

Kavita

Shukla

Archana

2008

World J Microbiol Biotechnol

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“…The ability of Cd to enter plants depends on a number of biotic and abiotic factors including plant species (Grant et al, 2008), microbial activity (Gao et al, 2010), soil pH (Mann & Ritchie, 1993;Peijnenburg et al, 2000), soil organic matter (Murray et al, 2010), cation-exchange capacity (Bolan et al, 2003a(Bolan et al, , 2003b, presence of chelators, e.g., organic acids (Cieśliński et al, 1998), presence of competing or complexing ions (Gao et al, 2011), and amounts of total and plant-available Cd in the soil (Carbonell et al, 2011;Wang et al, 2006). Translocation of Cd within the plant depends on three major transport processes: passive and/or active uptake of Cd into the root (Cataldo et al, 1983;Zhao et al, 2002), xylem transport from the roots to the shoots (Uraguchi et al, 2009) and translocation to the seeds via phloem (Tanaka et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Species-Specific Relationship between Transpiration and Cadmium Translocation in Lettuce, Barley and Radish

Ahkter¹,

Macfie²

2012

JPS

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Cadmium (Cd) may accumulate in plants to levels that are of concern in human diets. Our ability to predict the accumulation of Cd in plants is restricted by our poor understanding of the physiological processes that control Cd accumulation and translocation. A hydroponic experiment was carried out to test the hypothesis that the amount of Cd taken up and translocated to aboveground tissues is proportional to the volume of water transpired in lettuce (Lactuca sativa L.), barley (Hordeum vulgare L.) and radish (Raphanus sativus L.). Transpiration was measured as mass of water lost. Increased transpiration caused increased accumulation of Cd in plants; however, the proportion of total Cd translocated to the leaves ranged from 85% in lettuce to 66% in radish to only 21% in barley. Thus, factors controlling species-specific internal distribution of Cd are more important than transpiration in translocating Cd to aboveground tissues.

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“…In the literature, exudation of low molecular weight organic acids (LMWOA) has been hypothesized to increase the phytoavailability of Cd (Cieśliński et al 1998;Nigam et al 2001). However, in soil conditions, the mechanisms responsible for that are not easy to elucidate.…”

Section: Strong Complexation Kinetic Limitation and Low Complex Contrmentioning

confidence: 99%

Ranking of mechanisms governing the phytoavailability of cadmium in agricultural soils using a mechanistic model

et al. 2015

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Aims The objective of this study was to rank the mechanisms influencing the phytoavailability of cadmium(Cd) in agricultural soils.Methods We developed a model that simulates the transport by diffusion and convection, the kinetics ofsorption and complexation in solution and the root uptake of Cd. The ranking of mechanisms was performed by simulating the Cd2+ uptake by 1 cm2 root for 30 days for French agricultural soil characteristics.Results The initial Cd2+ concentration was the most influential parameter followed by the soil buffer power for Cd2+ and by the soil water content and impedance factor. The Cd2+ was generally strongly depleted at theroot surface and the convection was almost negligible. In general, the Cd complex dissociation contributedlittle to the uptake due to a strong kinetics limitation. Conversely, the kinetics of sorption was little influential.Conclusions The initial concentration and diffusion of Cd2+ were the dominant processes governing the phytoavailability in non-polluted soils. A model considering only the transport and sorption of Cd2+ without kineticswould be adequate to predict the phytoavailability. The particular situations where these simplifications do nothold (relative error >10 %) corresponded to a high supply of labile Cd complex toward plant roots

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Untitled

Cited by 237 publications

References 41 publications

Amelioration of phytotoxic effects of Cd on mung bean seedlings by gluconic acid secreting rhizobacterium Enterobacter asburiae PSI3 and implication of role of organic acid

Amelioration of phytotoxic effects of Cd on mung bean seedlings by gluconic acid secreting rhizobacterium Enterobacter asburiae PSI3 and implication of role of organic acid

Species-Specific Relationship between Transpiration and Cadmium Translocation in Lettuce, Barley and Radish

Ranking of mechanisms governing the phytoavailability of cadmium in agricultural soils using a mechanistic model

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