Observations on chloroplast starch content and synthesis in the intertidal marine alga Codium fragile (Suringar) Hariot

A marked seasonal response was observed in the starch content of chloroplasts of Codium fragile sampled between November 1983 and November 1984. Chloroplast starch uniformly increased throughout the life-cycle of this alga, reaching a maximum in the summer months of approx. 5 mg glucose equivalents/...

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Veröffentlicht in:The New phytologist. - 1979. - 108(1988), 3 vom: 20. März, Seite 285-290
1. Verfasser: Williams, Michael L (VerfasserIn)
Weitere Verfasser: Cobb, A H
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 1988
Zugriff auf das übergeordnete Werk:The New phytologist
Schlagworte:Journal Article Codium fragile Starch chloroplasts stromal phosphate
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520 |a A marked seasonal response was observed in the starch content of chloroplasts of Codium fragile sampled between November 1983 and November 1984. Chloroplast starch uniformly increased throughout the life-cycle of this alga, reaching a maximum in the summer months of approx. 5 mg glucose equivalents/109 plastids when C. fragile was in the reproductive phase. Chloroplast starch content was found to be inversely proportional to the concentration of stromal phosphate, decreasing linearly from 5 to 2 mg glucose equivalents/109 plastids over a range of stromal phosphate values of 0·75-1·5 μmol PO4 /109 plastids. Similarly, the net amount of starch synthesized over 3 h by isolated chloroplasts increased linearly with respect to initial chloroplast starch content. These observations are discussed in relation to the regulation of starch synthesis by variations in the stromal P1 : PGA ratio 
650 4 |a Journal Article 
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650 4 |a Starch 
650 4 |a chloroplasts 
650 4 |a stromal phosphate 
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