Observations on the mechanism of copper damage in chlorella.
TLDR
Adding excess copper to nongrowing cells of a normal, green Chlorella caused a reduction in total pigments and a blue shift of chlorophyll absorption, concurrent with the inhibition of photosynthesis, and selective inhibition of some responses to copper was observed when O(2) was absent or an antioxidant present.Abstract:
Addition of excess copper to nongrowing cells of a normal, green Chlorella caused a reduction in total pigments and a blue shift of chlorophyll absorption, concurrent with the inhibition of photosynthesis. Chlorophylless yellow and white mutant strains of the same alga showed a rise in nonspecific absorption (i.e., change in light scatter) within 5 to 10 minutes after the addition of CuSO(4); concomitantly a lowering of packed cell volume and a rise in respiration occurred. Glutathione prevented all copper-induced changes, whereas MnCl(2) protected only partially. Selective inhibition of some responses to copper was observed when O(2) was absent or an antioxidant present.read more
Citations
More filters
Journal ArticleDOI
Interactive influences of bioactive trace metals on biological production in oceanic waters
TL;DR: In this paper, the authors present an overview of the oceanic chemistries of the bioactive trace metals, Mn, Fe, Co, Ni, Cu, and Zn, combining field data with results from laboratory phytoplankton culture-trace metal studies and speculate on the potential influences of these trace metals on oceanic plankton production and species composition.
Journal ArticleDOI
Environmental relevance of heavy metal-substituted chlorophylls using the example of water plants
TL;DR: It was discovered that the substitution of the central atom of chlorophyll, magnesium, by heavy metals in vivo is an important damage mechanism in stressed plants, preventing photosynthetic light-harvesting in the affectedchlorophyll molecules, resulting in a breakdown of photosynthesis.
Journal ArticleDOI
Phycology and heavy-metal pollution
TL;DR: All heavy metals, including those that are essential micronutrients (e.g. copper, zinc, etc.), are toxic to algae at high concentrations.
Journal ArticleDOI
In situ detection of heavy metal substituted chlorophylls in water plants
TL;DR: In this article, a number of methods are presented for the efficient in situ detection of this substitution (i.e. in whole plants or in chloroplasts) while macroscopic observations point to the formation of heavy metal chlorophylls at higher concentrations, fluorescence microscopy enables the detection of the reaction at very low substitution rates Therefore, the course of this reaction can be followed by continuously measuring the fluorescence of whole plants Furthermore absorbance spectroscopy of whole cells or isolated chloroplast also enables the in situ detecting of heavy-metal chlorophyLLs.
BookDOI
Physiology and biochemistry of metal toxicity and tolerance in plants
TL;DR: In this paper, Mysliwa-Kurdziel et al. studied the effect of heavy metal on the light phase of photosynthesis in plants and found that heavy metal influence on photosynthetic pigments was significant.
References
More filters
Journal Article
The general pharmacology of the heavy metals
TL;DR: A discussion of predominantly theoretical aspects of metal poisoning is presented and the responses of biological systems to heavy metals were considered in terms of inferences that could be made concerning the site of the original chemical insult.
Book ChapterDOI
Complex formation between metallic cations and proteins, peptides and amino acids.
TL;DR: The chapter presents a survey of what has been gained from the experimental studies of complex formation between proteins and metal ions in a series of reversible systems.
Journal ArticleDOI
The absorption spectra of suspensions of living micro-organisms.
TL;DR: In this article, a new method is described for obtaining sharp absorption spectra from suspensions of micro-organisms, which does not involve any treatment of the suspension or any change of the optical system of the spectrophotometer.
Journal ArticleDOI
Inorganic micronutrient requirements of chlorella. I. Requirements for calcium (or strontium), copper, and molybdenum.
TL;DR: In this paper, the green alga Chlorella pyrenoidosa has been demonstrated for demonstrating requirements for the inorganic micronutrients calcium (or strontium), copper, and molybdenum, in addition to previously established requirements for iron, manganese and zinc.