Significance of phenols in cadmium and nickel uptake

Kováčik, Jozef; Klejdus, Bořivoj; Hedbávný, Josef; Zoń, Jerzy

doi:10.1016/j.jplph.2010.09.011

Cited by 71 publications

(15 citation statements)

References 37 publications

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“…Only Na content increased in shoots indicating partial uptake from SNP molecule (Table 1). Cd-induced alteration of minerals, despite shorter exposure time, is in accordance with earlier observations in chamomile [8], [12]. Interestingly, both SNP and PTIO ameliorated Cd-induced Zn depletion in roots (Table 1).…”

Section: Resultssupporting

confidence: 91%

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Unexpected Behavior of Some Nitric Oxide Modulators under Cadmium Excess in Plant Tissue

et al. 2014

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Various nitric oxide modulators (NO donors - SNP, GSNO, DEA NONOate and scavengers – PTIO, cPTIO) were tested to highlight the role of NO under Cd excess in various ontogenetic stages of chamomile (Matricaria chamomilla). Surprisingly, compared to Cd alone, SNP and PTIO elevated Cd uptake (confirmed also by PhenGreen staining) but depleted glutathione (partially ascorbic acid) and phytochelatins PC2 and PC3 in both older plants (cultured hydroponically) and seedlings (cultured in deionised water). Despite these anomalous impacts, fluorescence staining of NO and ROS confirmed predictable assumptions and revealed reciprocal changes (decrease in NO but increase in ROS after PTIO addition and the opposite after SNP application). Subsequent tests using alternative modulators and seedlings confirmed changes to NO and ROS after application of GSNO and DEA NONOate as mentioned above for SNP while cPTIO altered only NO level (depletion). On the contrary to SNP and PTIO, GSNO, DEA NONOate and cPTIO did not elevate Cd content and phytochelatins (PC2, PC3) were rather elevated. These data provide evidence that various NO modulators are useful in terms of NO and ROS manipulation but interactions with intact plants affect metal uptake and must therefore be used with caution. In this view, cPTIO and DEA NONOate revealed the less pronounced side impacts and are recommended as suitable NO scavenger/donor in plant physiological studies under Cd excess.

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Section: Resultssupporting

confidence: 91%

“…Chamomile ( Matricaria chamomilla L.) is a widely-used medicinal plant that considerably accumulates mainly Cd in the above-ground biomass at high exogenous concentrations without visible damage [12] and is therefore suitable object for the present investigation.…”

Section: Introductionmentioning

confidence: 99%

Unexpected Behavior of Some Nitric Oxide Modulators under Cadmium Excess in Plant Tissue

et al. 2014

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“…Upon addition of SA to Cd-exposed M. chamomilla , however, PAL activity slightly increased in leaves and strongly decreased in roots, an effect associated with SA toxicity ( Kováčik et al, 2009a ). In M. chamomilla treated with the in vivo PAL inducer 2-aminoindane-2-phosphonic acid and exposed to Cd, PAL activity increased while the uptake of Cd decreased ( Kováčik et al, 2011 ). Overall, these results indicate a role for increased PAL activity leading to Cd-induced lignification as an effective defense response.…”

Section: Cadmium Induces Cell Wall Remodelingmentioning

confidence: 99%

Reciprocal Interactions between Cadmium-Induced Cell Wall Responses and Oxidative Stress in Plants

et al. 2017

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Cadmium (Cd) pollution renders many soils across the world unsuited or unsafe for food- or feed-orientated agriculture. The main mechanism of Cd phytotoxicity is the induction of oxidative stress, amongst others through the depletion of glutathione. Oxidative stress can damage lipids, proteins, and nucleic acids, leading to growth inhibition or even cell death. The plant cell has a variety of tools to defend itself against Cd stress. First and foremost, cell walls might prevent Cd from entering and damaging the protoplast. Both the primary and secondary cell wall have an array of defensive mechanisms that can be adapted to cope with Cd. Pectin, which contains most of the negative charges within the primary cell wall, can sequester Cd very effectively. In the secondary cell wall, lignification can serve to immobilize Cd and create a tougher barrier for entry. Changes in cell wall composition are, however, dependent on nutrients and conversely might affect their uptake. Additionally, the role of ascorbate (AsA) as most important apoplastic antioxidant is of considerable interest, due to the fact that oxidative stress is a major mechanism underlying Cd toxicity, and that AsA biosynthesis shares several links with cell wall construction. In this review, modifications of the plant cell wall in response to Cd exposure are discussed. Focus lies on pectin in the primary cell wall, lignification in the secondary cell wall and the importance of AsA in the apoplast. Regarding lignification, we attempt to answer the question whether increased lignification is merely a consequence of Cd toxicity, or rather an elicited defense response. We propose a model for lignification as defense response, with a central role for hydrogen peroxide as substrate and signaling molecule.

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“…32 Cadmium has deep effects on the composition of cell wall. [33][34][35][36] Huttová et al 37 analyzed changes in peroxidase activity as well as isozyme peroxidase pattern in five cell wall (CW) fractions of barley roots treated with 1 mM cadmium for 48 h and 72 h, whereas strong inhibition of peroxidase activity was observed in fraction CW I and weak inhibition in fractions CW II, III and IV, strong activation of peroxidase was detected in fraction V. Despite the inhibition of enzyme activity in most cell wall fractions, induction of several isoperoxidases was detected after separation on PAGE. 37 Douchiche et al found cadmium treatment induced an increase of the amount of cellulose.…”

Section: Cadmium and Cell Wall Constructionmentioning

confidence: 99%