- Title
- Roles of plasma membrane transporters in phloem functions
- Creator
- Tegeder, Mechthild; Ruan, Yong-Ling; Patrick, John W.
- Relation
- Phloem: Molecular Cell Biology, Systemic Communication, Biotic Interactions p. 63-101
- Publisher Link
- http://dx.doi.org/10.1002/9781118382806.ch4
- Publisher
- Wiley Blackwell
- Resource Type
- book chapter
- Date
- 2013
- Description
- Phloem functions as a supracellular highway for long-distance transport of resources (nutrients and water), toxic elements/compounds and signals (macromolecules, phytohormones, redox reagents and electrical potential waves) coordinating growth, development, plant homeostasis, and defense responses. Apart from macromolecules, phloem transport function includes membrane passage of the above constituents at some point(s) along the phloem transport pathway. These membrane transport events are mediated by transporters localized to plasma membrane (primarily) or tonoplast with the latter functioning in buffering transport fluxes by exchange to, and from, cell vacuoles. Transporter proteins function as carriers (± energy coupled) or channels. For each transporter, dependent upon published information, consideration will be given to their intra- and intercellular localization, transport properties (biochemical and biophysical) related to perceived cellular function, and physiological significance (deduced from knockout/knockdown approaches) to achieve an overall phloem transport flux.
- Subject
- plasma membrane; phloem functions; phloem transport
- Identifier
- http://hdl.handle.net/1959.13/1307752
- Identifier
- uon:21516
- Identifier
- ISBN:9780470958605
- Language
- eng
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