Fatty Acids and Circadian Rhythms in Phaseolus coccineus: Effects of Light, Temperature, and Chemicals 1

AUTOR(ES)

Gardner, George F.

RESUMO

Five major fatty acids, palmitic (16:0), stearic (18:0), oleic (18:1), linoleic (18:2), and linolenic (18:3), were identified in polar lipid extracts from pulvini of Samanea saman and Phaseolus coccineus. In P. coccineus their distribution varied quantitatively in the laminar pulvinus, petiolar pulvinus, petiole, stem, leaf and root. Short pulses of red light did not greatly affect the relative quantities of fatty acids in dark grown P. coccineus, but a 30-minute exposure of red light generally increased the degree of unsaturation by increasing linolenic acid and decreasing linoleic and palmitic acids.

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