Spinach, fatty acid composition

Other workers (Frentzen ef a/., 1983) have previously shown that purified stromal ATI activities from spinach and pea, two chilling resistant species, clearly prefer to use 18 1-ACP in preference to either 16 0- or 18 0-ACP in the synthesis of lysophosphatidic acid (LPA). We set out to see if partially purified stromal AT 1 from chilling sensitive species exhibit properties which are consistent with Murata s hypothesis. We have compared the results from these experiments with the fatty acid composition of PG synthesized from i c-acetate by isolated chloroplasts. 

PG which is postulated to be a major lipid class responsible for chilling sensitivity composed of 16 0, (3 )-16 l and 18 1 as major fatty acid constituents (Table 1). Annual plants such as spinach did not contain 18 1 in a significant amount. Thus, PG in leaves of camellia species has a characteristic fatty acid composition. PG Isolated from leaves of sakaki (Cleyera japonica), camphor tree (Cinnamomum comphora) and mirica (Mirica rubra) showed fatty acid composition similar to that of camellia species. In PG from tea leaves, 18 1 exclusively attached to C-1 position of PG and (3 )-16 l to C-2 position (Table 2). 

Table 3.2. The Fatty Acid Compositions of the Main Chloroplast Thylakoid Lipids from Spinach, 16 3 Plant, and Barley, 18 3 Plant...

Table 7.4 Fatty acid composition of galactosylacylglycerols from E gracilis cells or spinach chloroplasts...

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