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9 recherche sur le mot-clé
'plasma membrane' 
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H. Logan ; M. Basset ; A. Very ; H. Sentenac | 1997Considerable progress in identifying transport systems of the plant plasma membrane has been made recently. The putative systems cloned to date comprise H+-ATPases, potassium, chloride and water channels, and carriers involved in the transport o[...]
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L. Williams ; J. Bick ; A. Neelam ; K. Weston ; J. Hall | 1996The use of energized plasma membrane vesicle preparations from cotyledons and roots of Ricinus communis seedlings is described, and evidence is presented for the existence of plasma membrane H+/sucrose and H+/amino acid symporters. Using fractio[...]
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N. Frangne ; M. Maeshima ; A. Schaffner ; T. Mandel ; E. Martinoia ; J. Bonnemain | 2001Recently, it has been shown that water fluxes across biological membranes occur not only through the lipid bilayer but also through specialized water-conducting proteins, the so called aquaporins. In the present study, we investigated in young a[...]
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D. Rentsch ; W. Frommer | 1996The combination of two sets of molecular tools, namely yeast expression cloning and the possibility of constructing transgenic plants, has allowed analysis of the transport processes occurring at the plasma membrane in higher plants. To date, mo[...]
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C. Kuhn ; L. Barker ; L. Burkle ; W. Frommer | 1999Sucrose as the major transported form of fixed carbon, must be translocated from the sites of synthesis, i.e. the green tissues, to the sites of consumption and storage, i.e. the non-green cells and organs. For apoplasmic transport, carrier-medi[...]
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Although plants are photoautotrophic organisms, they are composed of many heterotrophic tissue systems that must import sugars and amino acids in a process known as assimilate partitioning. While the general features of assimilate partitioning w[...]
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A. Jamai ; M. Laloi ; A. Bourbouloux ; M. Valantin ; S. Delrot | 1996Uptake of the dipeptide [H-3]Leu-Leu into leaf discs from mature broad bean (Vicia faba L.) was characterized. Uptake was maximal at p H 6.0 and appeared to be mediated by three systems with apparent K-m values of 20 mu M, 350 mu M and 43 m M, r[...]
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H. Hellmann ; L. Barker ; D. Funck ; W. Frommer | 2000
