1978
DOI: 10.1104/pp.61.3.472
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Relationship between Chloroplast Membrane Fatty Acid Composition and Photosynthetic Response to a Chilling Temperature in Four Alfalfa Cultivars

Abstract: The photosynthetic responses of four alfalfa (Medicago sadva L.) cultivars to 10 and 22 C air temperatures were examined and the relationship between the photosynthetic response at 10 C and the fatty acid composition of the chloroplast membranes was determined. Chilling-resistant cultivars exhibited moderate reductions in photosynthesis at 10 C, compared to 22 C, and contained a significantly greater percentage of polyunsaturated fatty acids in the chloroplast membrane and a greater double bond index than the … Show more

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Cited by 32 publications
(11 citation statements)
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“…This has been demonstrated repeatedly in tissues sensitive to low temperatures, which exhibit a lipid phase transition in the 8 to 12 C range (16 controls (6). This suggests that the increase in 18:3 representation during temperature decline was, in part, responsible for maintenance of an optimal winter range of lamellar viscosity for structural and functional stability of lamellae (4,21,22). Similar changes in unsaturation of fatty acids assocated with the membrane have been shown in plants at different growth temperatures, the degree of unsaturation responding inversely to low (5,18) (4,27).…”
Section: Discussionmentioning
confidence: 83%
“…This has been demonstrated repeatedly in tissues sensitive to low temperatures, which exhibit a lipid phase transition in the 8 to 12 C range (16 controls (6). This suggests that the increase in 18:3 representation during temperature decline was, in part, responsible for maintenance of an optimal winter range of lamellar viscosity for structural and functional stability of lamellae (4,21,22). Similar changes in unsaturation of fatty acids assocated with the membrane have been shown in plants at different growth temperatures, the degree of unsaturation responding inversely to low (5,18) (4,27).…”
Section: Discussionmentioning
confidence: 83%
“…(24) as a measure of PSI and PSII activity. Chloroplasts were isolated from 10 g depetiolated leaves from each plant in 25 ml extraction buffer (15 (400-700 nm). The Petri plates were gently swirled during incubation.…”
mentioning
confidence: 99%
“…A low temperature induced accumulation of linolenic acid could be masked by the accelerated chloroplast accumulation at 10°C when younger plants of the same age were compared. (13) analyzed the fatty acid cotr. It seems that plants of the same age which have been raised at different temperatures are difficult to compare: growth temperature affects plant development, the stages of which are often associated with the synthesis or degradation of specific lipid components.…”
Section: Discussionmentioning
confidence: 99%