Induction of enzyme capacity in plants as a result of heavy metal toxicity: Dose-response relations in Phaseolus vulgaris L., treated with zinc and cadmium

Assche, Frank Van; Cardinaels, C.; Clijsters, H.

doi:10.1016/0269-7491(88)90084-x

Cited by 189 publications

(73 citation statements)

References 21 publications

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“…The oxidized form of glutathione is also reduced in these cells by the NADPH-dependent glutathione reductase. Moreover, under toxic zinc and cadmium treatment, increased ME capacity strongly correlated with growth inhibition, as was reported in Phaseolus vulgaris (Van Assche et al, 1988). Because NADP-ME3 is highly expressed in trichomes, it might be involved in providing NADPH for these reactions.…”

Section: Lack Of Obvious Phenotypes Of Nadp-me Knockout Mutants At Nomentioning

confidence: 65%

A Comprehensive Analysis of the NADP-Malic Enzyme Gene Family of Arabidopsis

et al. 2005

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The Arabidopsis (Arabidopsis thaliana) genome contains four genes encoding putative NADP-malic enzymes (MEs; AtNADP-ME1-ME4). NADP-ME4 is localized to plastids, whereas the other three isoforms do not possess any predicted organellar targeting sequence and are therefore expected to be cytosolic. The plant NADP-MEs can be classified into four groups: groups I and II comprising cytosolic and plastidic isoforms from dicots, respectively; group III containing isoforms from monocots; and group IV composed of both monocots and dicots, including AtNADP-ME1. AtNADP-MEs contained all conserved motifs common to plant NADP-MEs and the recombinant isozymes showed different kinetic and structural properties. NADP-ME2 exhibits the highest specific activity, while NADP-ME3 and NADP-ME4 present the highest catalytic efficiency for NADP and malate, respectively. NADP-ME4 exists in equilibrium of active dimers and tetramers, while the cytosolic counterparts are present as hexamers or octamers. Characterization of T-DNA insertion mutant and promoter activity studies indicates that NADP-ME2 is responsible for the major part of NADP-ME activity in mature tissues of Arabidopsis. Whereas NADP-ME2 and -ME4 are constitutively expressed, the expression of NADP-ME1 and NADP-ME3 is restricted by both developmental and cellspecific signals. These isoforms may play specific roles at particular developmental stages of the plant rather than being involved in primary metabolism.

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Section: Lack Of Obvious Phenotypes Of Nadp-me Knockout Mutants At Nomentioning

confidence: 65%

A Comprehensive Analysis of the NADP-Malic Enzyme Gene Family of Arabidopsis

et al. 2005

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“…(Baszynski et al, 1980 ;Baszynski, 1986 ;Van Assche et al, 1988 ;Van Assche & Clijsters, 1990). In particular, Cd# + causes structural changes in chloroplasts (Becerril et al, 1988) and inhibits chlorophyll (Chl) biosynthesis (Stobart et al, 1985 ;Van Assche & Clijsters, 1990 ;Somashekaraiah et al, 1992).…”

Section: mentioning

confidence: 99%

Effects of cadmium on growth of Helianthus annuus seedlings: physiological aspects

et al. 1999

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Sunflower seedlings (Helianthus annuus hybrid Select) were grown in a complete nutrient solution in the absence or presence of Cd# + (10 and 20 µM). Analyses were performed to establish whether there was a differential effect of Cd# + on mature and young leaves. After 7 d the growth parameters as well as the leaf area had decreased in both mature and young leaves. Accumulation of Cd# + in the roots exceeded that in the shoots. Seedlings treated with Cd# + exhibited reduced contents of chlorophyll and CO # assimilation rate, with a greater decrease in young leaves. The photochemical efficiency of photosystem II (PSII) was not altered by Cd# + treatment in either mature or young leaves, although during steady-state photosynthesis in young leaves there was a significant alteration in the following parameters : quantum yield of electron transport by PSII (Φ PSII ), photochemical quenching (q P ), nonphotochemical quenching (q NP ), and excitation capture efficiency of PSII (Φ exc ).

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“…Cadmium generally inhibits germination of seeds (Rascio et al 1993), plant growth (Greger et al 1991), nutrition distribution (Moral et al 1994), photosynthesis (Krupa et al 1993), it increases activity of several enzymes, e.g. glucose-6-phosphate-dehydrogenase (Van Assche et al 1988) whereas activity of other enzymes are influenced differently (Karataglis et al 1991). Since Cd 2+ ions accumulate at higher levels in leaves than in other parts of plants (Marschner 1995), most research into the phytotoxic effects of Cd has been focused on the inhibition of photosynthesis.…”

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confidence: 99%

Toxicity comparison of some possible toxic metals (Cd, Cu, Pb, Se, Zn) on young seedlingsof Sinapis alba L.

Fargašová¹

2004

Plant Soil Environ.

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The chronic ecotoxicological effects of Cd, Cu, Pb, Se and Zn were determined within this study. Mustard seedlings (Sinapis alba L.) were used as a model subject for the tests. The phytotoxicity was determined through the root growth inhibition and photosynthetic pigments production (chlorophyll a, b, total carotenoids). The metal accumulation in the roots and cotyledons was also determined using the AAS methods. On the basis of IC 50 values and their 95% confidence intervals (CI) for the root elongation of S. alba seedlings, metals can be arranged in the rank order of inhibition as follows: Cu > Se > Cd > Zn >> Pb. When the photosynthetic pigments production was determined, Se demonstrated the lowest inhibitory effect on all pigment types and Pb did the highest. The accumulated amount of metals from hydroponic solution into the roots and cotyledons decreased in the order Cd > Zn > Se > Pb > Cu.

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Induction of enzyme capacity in plants as a result of heavy metal toxicity: Dose-response relations in Phaseolus vulgaris L., treated with zinc and cadmium

Cited by 189 publications

References 21 publications

A Comprehensive Analysis of the NADP-Malic Enzyme Gene Family of Arabidopsis

A Comprehensive Analysis of the NADP-Malic Enzyme Gene Family of Arabidopsis

Effects of cadmium on growth of Helianthus annuus seedlings: physiological aspects

Toxicity comparison of some possible toxic metals (Cd, Cu, Pb, Se, Zn) on young seedlingsof Sinapis alba L.

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