The composition of free fatty acids and mitochondrial activity in seedlings of winter cereals under cold shock

Vojnikov, V.; Luzova, G. B.; Korzun, A. M.

doi:10.1007/bf01075254

Cited by 10 publications

(1 citation statement)

References 21 publications

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“…Both the uncoupling of oxidative phosphorylation and the increase in free fatty acids are prevented by incubating the tissues in procaine or lidocaine. The fact that these local anaesthetics are inhibitors of phospholipases led Vojnikov et al, (1983) to propose that the increased activity of phospholipases at low temperatures fnay lead to increased levels of free fatty acids and, hence, the uncoupling of oxidative phosphorylation. However, it is also possible that the increased aetivity of lipases at low temperatures is not due to cold temperatures per se, but to rapid-cooling-induced increases in [Ca' ' *^]^.^, (e.g.…”

Section: Biochemistry and Metabolismmentioning

confidence: 99%

Temperature sensing by plants: a review and hypothesis

Minorsky

1989

Plant Cell & Environment

107

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Abstract. The different effects which fast versus slow cooling have on such fundamental plant processes as ion transport, protoplasmic streaming, phloem translocation, growth, cell motility, water absorption and membrane potential are reviewed. When plant cells are rapidly cooled to non‐injurious temperatures, many of the physiological ramifications of rapid‐cooling stimulation are only transiently observed. It is proposed that these transient rapid‐cooling‐induced responses, sometimes elicited by temperature drops of only a few degrees centigrade, are manifestations of temperature sensing. The hypothesis is advanced that graded potentials, produced in response to rapidly falling temperature, are associated with graded increases in cytosolic free calcium. These transient increases in cytosolic free calcium give rise to many of the physiological effects elicited by rapid cooling. Other effects, however, such as those associated with alterations in membrane composition, gene expression and post‐translational modifications of proteins, may persist longer. The questions of the possible physiological advantage of temperature sensing, and its implications for the study of chilling injury, are discussed.

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Section: Biochemistry and Metabolismmentioning

confidence: 99%

Temperature sensing by plants: a review and hypothesis

Minorsky

1989

Plant Cell & Environment

107

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Do Anti-Oxidants and Local Anaesthetics Extend Pollen Longevity during Dry Storage?

Hoekstra¹,

Barten

1986

Biotechnology and Ecology of Pollen

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Differential effect of temperature on mitrochondrial activity in shoots from freshly harvested and moderately aged kernels of maize (Zea mays L.)

Dreyer

Venter

1992

Plant Growth Regul

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This paper reports on a study of mitochondrial activity in etiolated shoots of freshly harvested and moderately aged kernels of maize. Activity was investigated after incubation at a favourable temperature (25 "C), sub-optimal temperature (13 "C) and after a heat shock (46 "C for 2 h). Although impaired mitochondrial activity in shoots from moderately aged maize kernels was not detected at 25 "C, deficiencies became evident under low temperature stress (13 "C). State 3 oxygen uptake, cyanide-insensitive oxygen uptake and cytochrome oxidase activity were lower in mitochondria from these shoots at 13 "C than in mitochondria from shoots of freshly harvested kernels at this temperature. After a heat shock, cyanide-insensitive oxygen uptake was higher, and cytochrome oxidase activity lower, in shoots of aged kernels than in shoots of fresh kernels. No significant differences in ADP: 0 ratio or succinate dehydrogenase activity occurred between mitochondria from shoots of the two seed lots in any of the temperature treatments.

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The composition of free fatty acids and mitochondrial activity in seedlings of winter cereals under cold shock

Cited by 10 publications

References 21 publications

Temperature sensing by plants: a review and hypothesis

Temperature sensing by plants: a review and hypothesis

Do Anti-Oxidants and Local Anaesthetics Extend Pollen Longevity during Dry Storage?

Differential effect of temperature on mitrochondrial activity in shoots from freshly harvested and moderately aged kernels of maize (Zea mays L.)

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