Journal ArticleDOI
Changes in carotenoids and fatty acids in photosystem II of Cudeficient pea plants
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TLDR
In the green alga Dunaliella the effect of Cu deficiency on fatty acid composition was similar to that in pea plants, but the influence on the carotenoid pattern was much less pronounced.Abstract:
Photosystem II (PSII) from Cu-deficient pea plants (Pisum sativum L., cv. Lincoln) has been investigated for electron transport activity, Cu content, and changes in some lipid components. Total fatty acid content was lower that in control plants, with an additional shift in the C18 fatty acid patterns. Less α-linolenic and more linoleic and oleic acids were found. PSII preparations from Cu-depleted plants showed a decreased carotenoid content in light harvesting chlorophyll a/b complex of photosystem II (LHCII) and additional variations in pigment composition of pigment-protein complexes. In the green alga Dunaliella the effect of Cu deficiency on fatty acid composition was similar to that in pea plants, but the influence on the carotenoid pattern was much less pronounced.read more
Citations
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Journal ArticleDOI
Copper in plants
TL;DR: This review gives a briefly overview of the current understanding of the more important features concerning copper toxicity and tolerance in plants, and brings information of recent findings on copper trafficking including copper detoxification factors, copper transporters and copper chaperones.
Journal ArticleDOI
Copper in plants: acquisition, transport and interactions
TL;DR: An overview of the current understanding of main features concerning copper function, acquisition and trafficking network as well as interactions between copper and other elements is given.
Journal ArticleDOI
MicroRNA-mediated systemic down-regulation of copper protein expression in response to low copper availability in Arabidopsis.
TL;DR: In Arabidopsis, microRNA-mediated down-regulation is a general mechanism to regulate nonessential copper proteins and it is proposed that this mechanism allows plants to save copper for the most essential functions during limited copper supply.
Journal ArticleDOI
Effect of copper on cellular processes in higher plants
TL;DR: The mechanisms of the metal toxicity depending largely on the growth stage of treated plants are presented in this review.
Journal ArticleDOI
Copper and photosystem II: A controversial relationship
TL;DR: In this article, the effect of toxic Cu on photosystem II (PSII) was discussed and the polemic results concerning its mechanism of action and Cu-binding sites were discussed, and other effects of Cu toxicity and Cu deprivation on the thylakoid membrane were also briefly described.
References
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Book ChapterDOI
Chlorophylls and carotenoids: Pigments of photosynthetic biomembranes
TL;DR: In this article, the spectral characteristics and absorption coefficients of chlorophylls, pheophytins, and carotenoids were analyzed using a two-beam spectrophotometer.
Journal ArticleDOI
Absorption of light by chlorophyll solutions
TL;DR: This paper deals with the estimation of chlorophyll in plant extracts by application of absorption coefficients of the isolated solid chlorophylla components, and the question of artifacts is automatically clarified.
Journal ArticleDOI
A highly resolved, oxygen-evolving photosystem II preparation from spinach thylakoid membranes
TL;DR: The properties of oxygenevolving PS II preparations obtained by detergent resolution of chloroplast thylakoid membranes are reported.
Journal ArticleDOI
Carotenoids in photosynthesis. I: Location in photosynthetic membranes and light-harvesting function
Journal ArticleDOI
Involvement of the light-harvesting complex in cation regulation of excitation energy distribution in chloroplasts.
TL;DR: Results provide direct evidence for the involvement of the light-harvesting complex in cation regulation of energy redistribution between the photosystems and support the concept that Mg/sup 2 +/ has two mechanics of action: one effect on energy distribution and a second direct effect on photosystem II centers.