Glycerolipid synthesis in Avena leaves during greening of etiolated seedlings I. Lipid changes in leaves
スポンサーリンク
概要
- 論文の詳細を見る
Etiolated seedlings of Avena sativa L. were illuminated under fluorescent light of 1,500 lux at 25℃ and the lipid changes in their first leaves and isolated plastids were followed during 24 hr of greening. Lipid changes were divided into a degradation phase [0 hr of illumination (hr-L) to 3 hr-L] and a synthetic phase (3 hr-L to 24 hr-L). In the degradation phase, which paralleled prolamellar body transformation in the plastids, both plastidic lipids, monogalactosyldiglyceride (MGDG), digalactosyldiglyceride (DGDG), sulfoquinovosyldiglyceride (SQDG) and phosphatidylglycerol (PG), and extraplastidic lipids, phosphatidylcholine (PC), phosphatidylethanolamine (PE) and phosphatidylinositol (PI), were partially degraded. Plastidic lipids (except DGDG) began to increase at 1.5 hr-L without the de novo synthesis of fatty acids, at the same time that there was a temporary accumulation of diglyceride, whose fatty acids were similar to the fatty acids of phospholipids such as PC, PE and PI, but different from the fatty acids of DGDG. This suggests that there is conversion of phospholipids to plastidic lipids during the later degradation phase. During the later degradation phase and the early synthetic phase (until 6 hr-L), plastid division occurred, resulting in a 30% increase in the plastid number per cell. Plastidic lipids were synthesized rapidly during the synthetic phase, in accordance with the beginning of light-enhanced fatty acid synthesis and thylakoid proliferation. In addition, the fatty acid composition of the plastidic lipids changed markedly throughout the synthetic phase: in MGDG, DGDG and SQDG, a-linolenate increased as linoleate decreased at both the C-1 and C-2 positions of sn-glycerol; in PG, a-linolenate increased in compensation for the decrease in linoleate at C-1 and hexadecenoate (3t) appeared and increased in compensation for the decrease in palmitate at C-2. This is evidence of the parallel desaturation of linoleate to linolenate at both C-1 and C-2 of MGDG, DGDG and SQDG, and also of the position-specific desaturation of linoleate to linolenate at C-1 of PG and of palmitate to hexadecenoate at C-2 of PG. The formation of hexadecenoate was entirely light-dependent. Extra-plastidic lipids increased slightly in the early synthetic phase (3 hr-L to 6 hr-L), but declined later.
- 日本植物生理学会の論文
著者
-
Yamada Mitsuhiro
Departmellt Of Biology C:ollegc Of Gencral Educatioll Universsity Of Tokyo
-
Yamada Mitsuhiro
Department Of Biology College Of General Education The University Of Tokyo
-
Ohnishi Jun-ichi
Department Of Biology College Of General Education The University Of Tokyo
-
Ohnishi Jun-ichi
Department Of Biochemistry And Molecular Biology Faculty Of Science Saitama University
関連論文
- A Digital l/f Noise Generator Utilizing Probabilistic Cellular Automata
- Importance of RNA synthesis within the lag phase preceding benzyladenine-induced growth of cucumber cotyledons in the dark
- Glycerolipid synthesis in Avena Leaves during Greening of Etiolated Seedlings III. : Synthesis of α-Linolenoyl-monogalactosyl Diacylglycerol from Liposomal Linoleoyl-phosphatidylcholine by Avena Plastids in the Presence of Phosphatidylcholine-exchange Pro
- Stereospecificity of hydrogen transfer by pyridine nucleotide-dpendent enoyl reductases in fatty acid synthesis : Studies with enzymes obtained from developing castor bean seeds and Chlorella vulgaris
- Transfer of phospholipids from microsomes to mitochondria in germinating castor bean endosperm
- A phosphatidyl choline exchange protein isolated from germinated castor bean endosperms
- Morphological Changes in Woody Stem of Prunus jamasakura under Simulated Microgravity
- Development of Lipid Synthesis from CO_2 in Avena Leaves during Greening of Etiolated Seedlings
- Differentiation of Photorespiratory Activity between Mesophyll and Bundle Sheath Cells of C_4 Plants II. Peroxisomes of Panicum miliaceum L.
- Polar and Neutral Lipid Changes in Spinach Leaves with Ozone Fumigation : Triacylglycerol Synthesis from Polar Lipids
- Change in Levels of Acyl Carrier Proteins in Greening Plants
- Proton/Pyruvate Cotransport into Mesophyll Chloroplasts of C_4 Plants : PROTEINS, ENZYMES AND METABOLISM : MEMBRANES AND BIOENERGETICS
- Effect of Thiolactomycin on Lipid Synthesis in Higher Plants
- Two Different Mechanisms for Transport of Pyruvate into Mesophyll Chloroplasts of C_4 Plants a Comparative Study : PROTEINS, ENZYMES AND METABOLISM : MEMBRANES AND BIOENERGETICS
- In Vivo and In Vitro Positive Interference by Cefpirome in Measurement of Serum Creatinine by the Jaffe Method
- Intracellular Localization of Phosphoenolpyruvate Carboxykinase in Bundle Sheath Cells of C_4 Plants
- Differentiation of Photorespiratory Activity between Mesophyll and Bundle Sheath Cells of C_4 Plants I. : Glycine Oxidation by Mitochondria
- Pyruvate Uptake by Mesophyll and Bundle Sheath Chloroplasts of a C_4 Plant, Panicum miliaceum L
- General Metabolic Changes in Leaf Lipeds in Response to Ozone : ENVIRONMENTAL AND STRESS RESPONSES
- Effect of Thiolactomycin on Fatty Acid Synthesis in Higher Plants
- Selective Inhibition of Type II Fatty Acid Synthetase by the Antibiotic Thiolactomycin
- Glycerolipid synthesis in Avena leaves during greening of etiolated seedlings II. : α-Linolenic acid synthesis
- Glycerolipid Synthesis in Avena Leaves during Greening of Etiolated Seedlings IV. : Effect of Light on Fatty Acid Desaturation
- Light-Enhanced Uptake of Metabolites in Mesophyll Protoplasts:Evidence for a Novel pyruvate Transport System
- Glycerolipid synthesis in Avena leaves during greening of etiolated seedlings I. Lipid changes in leaves
- A Measure of Complexity for 1/f Fluctuation
- Short-Time Information Entropy as a Complexity Measure
- Long chain fatty acid synthesis in developing castor bean seeds IV. The synthetic system in proplastids
- Glucose-6-Phosphate Dehydrogenase in Plastids from Developing Castor Bean Seeds
- Long chain fatty acid synthesis in developing castor bean seeds I. The operation of the path from acetate to long chain fatty acids in a subcellular particulate system
- Fatty acid synthesis by spinach chloroplasts III. Relationship between fatty acid synthesis and photophosphorylation
- Fatty acid synthesis by spinach chloroplasts I. Property of fatty acid synthesis from acetate
- Fatty acid synthesis by spinach chloroplasts II. The path from PGA to fatty acids
- Long chain fatty acid synthesis in developing castor bean seeds II. Operation of the path from sucrose to long chain fatty acids in a subcellular particulate system
- Lipid Transfer Proteins in Plants and Microorganisms
- Composition of phosphoglycerides and glycosyl glycerides in castor bean mitochondria
- Characterization of the Plastidic Phosphate Translocators in the Inducible Crassulacean Acid Metabolism Plant Mesembryanthemum crystallinum