By R. H. Falk, C. R. Stocking (auth.), C. R. Stocking, U. Heber (eds.)
The difficulties linked to the circulation of water and solutes in the course of the plant physique have intrigued scholars of vegetation considering Malpighi's conclusions in 1675 and 1679 that nutrient sap flows upward and downward in stems via vessels in either wooden and bark. Steven Hale's inventive experiments at the circulation of water in crops in 1726 and Hartig's observations of sieve-tube exudation within the mid-19th century set the degree for persevered extensive experiences on long-range shipping in vegetation. having said that curiosity for greater than two hundred years within the stream of solutes and water in vegetation, it has in simple terms been in the final 20 to 30 years that broad study attempt has been directed towards a severe overview of the interactions one of the a number of mobile organelles. the $64000 roles performed by way of the trade of metabolites within the keep an eye on and rules of mobile tactics is now well known, yet in so much situations poorly understood.
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Additional info for Transport in Plants III: Intracellular Interactions and Transport Processes
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4 PC phosphatidylcholine, PE phosphatidylethanolamine, DPG diphosphatidylglycerol, PG phosphatidylglycerol, PI phosphatidylinositoI. "MOREAU et aI. (1974). b MEUNIER and MAZLIAK (1972). MCCARTY et aI. (1973). d COLBEAU et aI. (1971). e PARSONS et aI. (1967). , 1973; HASHIMOTO and MURAKAMI, 1975; POINCELOT, 1973). Chlorophyll was absent, and the carotenoid composition of the envelope differed drastically from that of thylakoid membranes (DOUCE and BENSON, 1974). Between 60 and 90% of the total leaf hexoseamine has been reported to be associated with chloroplast envelope preparations from maize, sunflower, and spinach leaves.
1975). This structure, which is not considered thermodynamically likely by SINGER (1974), would provide a channel through which polar solutes could move. H. R. ': carner cytoplasm -t---s<:::: translocation release Fig. 24. 2 Carriers and Ionophores As early as 1933, OSTERHOUT suggested that small molecular weight ion carriers were involved in solute transport across membranes. Since then, there have been many suggestions concerning the possible mechanism of such carrier action. The discovery of low molecular weight (ca.
A list of some of the physical and chemical techniques used in studying blOmembranes. Of the numerous studies that have been made, only one general article is referred to in each instance Technique Use References X-ray diffraction Molecular motion in membranes Membrane lipid structure Rearrangement in plasma membrane Topological structure of membrane Lateral diffusion and phase separation in membranes Interaction of molecular species Conformational changes in proteins in membranes Conformational changes in proteins in membranes Phospholipids in membranes CAIN et al.