Evidence for Energy-Dependent 14C-Photoassimilate Retention in Isolated Tobacco Mesophyll Cells (Record no. 51748)

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control field MX-MdCICY
005 - DATE AND TIME OF LATEST TRANSACTION
control field 20250625160213.0
040 ## - CATALOGING SOURCE
Transcribing agency CICY
090 ## - LOCALLY ASSIGNED LC-TYPE CALL NUMBER (OCLC); LOCAL CALL NUMBER (RLIN)
Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) B-17585
008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION
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245 10 - TITLE STATEMENT
Title Evidence for Energy-Dependent 14C-Photoassimilate Retention in Isolated Tobacco Mesophyll Cells
490 0# - SERIES STATEMENT
Volume/sequential designation Plant Physiology, 76, p.753-758, 1984
520 3# - SUMMARY, ETC.
Summary, etc. 14C-photoassimilate release from isolated tobacco (Nicotiana tabacum L. cv Xanthi nc.)mesophyll cells was gradual and much of the photoassimilate was retained for several hours. 14C-product retention was enhanced by Ca2' and impaired by EDTA and ATP. Mg2' reduced the ATP-enhanced "C-efflux suggesting that ATP impairs product retention by modifying cell membrane permeability, possibly as a result of its chelating properties. Various metabolic inhibitors increased "4C-efflux indicating an energy requirement for "C-product retention. Profiles of "4C-product distribution in the cells and suspending medium indicated that "C-efflux from cells treated with carbonylcyanide p-trifluoromethoxyphenylhydrazone occurred by passive diffusion. Coupled with the observation that exogenous sucrose increased IC-efflux and the demonstration of C-sucrose uptake, the results suggest that product retention is partially due to the activity of an energy-dependent uptake process which recovers much of the photoassimilate lost from the cells. Under certain conditions, carbonylcyanide p-trifluoromethoxyphenylhydrazone reduced "4C-efflux. The apparently contradictory effects of the uncoupler appeared to be related to the intracellular photoassimilate concentration and may be explained by the partitioning of photoassimilate within the cells
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element ENERGY-DEPENDENT
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element 14C-PHOTOASSIMILATE RETENTION
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element ISOLATED TOBACCO MESOPHYLL CELLS
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Scorer, Keith N.
856 40 - ELECTRONIC LOCATION AND ACCESS
Uniform Resource Identifier <a href="https://drive.google.com/file/d/1Aunr77kiZQJshmusfM1uU7aknUJDl2I4/view?usp=drivesdk">https://drive.google.com/file/d/1Aunr77kiZQJshmusfM1uU7aknUJDl2I4/view?usp=drivesdk</a>
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Source of classification or shelving scheme Clasificación local
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  Clasificación local     Ref1 CICY CICY Documento préstamo interbibliotecario 25.06.2025   B-17585 25.06.2025 25.06.2025 Documentos solicitados