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. 1973 Feb;51(2):245-9.
doi: 10.1104/pp.51.2.245.

Functional and Structural Changes in Senescing Populus deltoides (Bartr.) Chloroplasts

R Hernández-Gil  1 , M Schaedle
Affiliations

Functional and Structural Changes in Senescing Populus deltoides (Bartr.) Chloroplasts

R Hernández-Gil et al. Plant Physiol. 1973 Feb.

Abstract

Chloroplasts isolated from Populus deltoides leaves were used to study age-dependent changes in the rate of cyclic photophosphorylation. Single leaves were used to measure CO(2) fixation by leaf discs, chlorophyll concentration, and ATP synthesis. The ability of chloroplasts to synthesize ATP diminished steadily from the time of full leaf expansion, regardless whether the results are expressed on a leaf area or chlorophyll basis. This decline in the rates of ATP synthesis was paralleled by the decline in the rate of CO(2) fixation. The results suggest that the efficiency of the membrane-bound ATP synthesizing system declines with age.

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References

    1. Plant Physiol. 1972 Sep;50(3):375-7 - PubMed
    1. Nature. 1966 Oct 22;212(5060):403-4 - PubMed
    1. Proc Natl Acad Sci U S A. 1968 Feb;59(2):606-12 - PubMed
    1. J Biol Chem. 1957 Dec;229(2):945-52 - PubMed
    1. Plant Physiol. 1972 Jan;49(1):64-71 - PubMed

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