Plant Physiol. Drug Metab Dispos
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Plant Physiology 67:926-929 (1981)
© 1981 American Society of Plant Biologists

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Articles

Effects of Cyanide on Rates and Products of Fatty Acid Synthesis by Chloroplasts Isolated from Spinacia oleracea1

P. Grattan Roughan2 and Harry Beevers

Division of Natural Sciences, Thimann Laboratories, University of California, Santa Cruz, California 95064

Cyanide inhibited unesterified fatty acid synthesis but stimulated glyceride synthesis from [1-14C]acetate when Spinacia oleracea chloroplasts were incubated in basal media. Both unesterified fatty acid and glyceride accumulation were inhibited when chloroplasts were incubated in a diacylglycerol mode. Stimulation of chloroplast fatty acid synthesis by either exogenous coenzyme A or Triton X-100 was almost completely abolished in the presence of cyanide. Stearoyl-ACP desaturation is considered to be inhibited to a greater extent than is fatty acid synthesis de novo.

2 Present address: Plant Physiology Division, Department of Scientific and Industrial Research, Private Bag, Palmerston North, New Zealand.

1 This work was supported in part by Department of Energy contract DE-ASO3-76SF00034.






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Copyright © 1981 by the American Society of Plant Biologists