Observations on the Mechanism of Copper Damage in Chlorella | Zendy

R. Gross | Zendy; P. Pugno | Zendy; W. M. Dugger | Zendy

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Observations on the Mechanism of Copper Damage in Chlorella

Author(s) -

R. Gross,

P. Pugno,

W. M. Dugger

Publication year - 1970

Publication title -

plant physiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.554

H-Index - 312

eISSN - 1532-2548

pISSN - 0032-0889

DOI - 10.1104/pp.46.2.183

Subject(s) - copper , photosynthesis , chlorella , respiration , chemistry , pigment , glutathione , absorption (acoustics) , antioxidant , chlorophyll , biophysics , botany , biochemistry , algae , biology , enzyme , physics , organic chemistry , acoustics

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.

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