The role of copper in photosynthesis

Droppa, Magdolna; Horváth, Gábor

doi:10.1080/07352689009382284

Cited by 120 publications

(71 citation statements)

References 133 publications

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“…At the level of whole plants, excess copper is known to inhibit growth and photosynthesis, the thresholds of toxicity being dependent on the plant species. The effects of copper on photosynthetic electron transport and photosystems have been extensively characterized using thylacoids or photosystem particles (for review, see [2,3]). Excess copper is also known (1) to inhibit a large number of enzymes, notably enzymes involved in the Benson-Clavin cycle, chlorophyll synthesis, and fatty acid metabolism, (2) to trigger oxidative damage and alteration of cell membrane properties, and (3) to induce thiol-rich polypeptides and enzymes, mostly peroxidases and esterases (for reviews, see [4][5][6][7]).…”

Section: Methodsmentioning

confidence: 99%

Arrest of mitochondrial biogenesis in copper‐treated sycamore cells

et al. 1996

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Sycamore suspension cells (Acer pseudoplatanus L.) were grown in the presence of sublethal concentrations of copper (50 BM). During the first 5-6 days of treatment, growth was not affected, but cell respiration (coupled and uncoupled) declined to 60% of its normal value. This decline of respiration was attributed to a progressive diminution of the number of mitochondria in copper-treated cells, based on the demonstration of the concomitant decline of (1) cardiolipin (diphosphatidylglycerol) and cytochrome aa3 (cytochrome oxidase), two specific markers of mitochondrial inner membrane, and (2) fumarase activity, a specific marker of mitochondrial matrix space. In addition, the mitochondria extracted from copper-treated cells presented the same properties as those from control cells, concerning substrate oxidation, cardiolipin and cytochrome aa3 contents, and fumarase activity. These results strongly suggest that copper triggered an arrest of mitochondrial biogenesis, which preceded cell division arrest.

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Section: Methodsmentioning

confidence: 99%

Arrest of mitochondrial biogenesis in copper‐treated sycamore cells

et al. 1996

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“…Cu has capacity to initiate oxidative damage and interfere with important cellular functions such as photosynthesis, pigment synthesis, plasma membrane permeability and other metabolic disturbances that are responsible for a strong inhibition of plant development. Lower chlorophyll (Chl) content, alterations of chloroplast ultrastructure and thylakoid membrane composition and inhibition of photosynthetic activity have been found in leaves in such growth conditions (for reviews see Droppa and Horváth, 1990;Barón et al, 1995;Yruela et al, 2005). On the other hand, it has also been reported that Cu treatments of leaves increase Chl content and photosynthetic activity (Nagler 1973;Jasiewicz, 1981;Tong et al, 1995).…”

Section: Introductionmentioning

confidence: 99%

Foliar and root Cu supply affect differently Fe- and Zn-uptake and photosynthetic activity in soybean plants

Bernal

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Picorel

et al. 2007

Environmental and Experimental Botany

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“…Copper causes also membrane damage at the chloroplast level and changes in thylakoid stacking (Ciscato etal., 1997;Lidon et al, 1993). Direct effects of copper on the two photosystems have been largely investigated (Droppa and Horvath, 1990;Baron et al, 1995), but the applicability of those findings to in vivo situations is not obvious.…”

Section: Introductionmentioning

confidence: 99%