2024-03-28T10:16:21Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1424262017-04-07T07:17:58Zcom_10261_118com_10261_6col_10261_1253
00925njm 22002777a 4500
dc
Etxeberria, E.
author
Pozueta Romero, Javier
author
Baroja-Fernández, Edurne
author
2012
The uptake of nutrients by plant cells has been traditionally believed to be mediated by membrane-bound carriers. However, the last decade has seen an increase in evidence pointing to the parallel uptake by fluid-phase endocytosis (FPE). Recent advances in plant endocytosis reveal that this is true for heterotrophic cells, whether storage parenchyma, cell suspensions, or nutrient absorbing cells of carnivorous plants. Uptake of extracellular matrix components, endocytic markers, and sugar analogs in a wide variety of heterotrophic cells has confirmed the uptake of extracellular fluids and their transport to the vacuole. Furthermore, there is evidence to indicate the passage through an intracellular compartment where solutes are distributed. The precise nature of FPE has not been revealed; however, evidence using specific inhibitors, CdSe/ZnS quantum dots in combination with other FPE markers and inhibitors such as ikargalukin, points to the clathrin-independent nature of FPE and its possible association with flotillin. That FPE operates in conjunction with membrane-bound transporters in the uptake of solutes is supported by experiments analyzing uptake kinetics of the fluorescent endocytic marker Alexa-488 in the presence of sucrose and membrane-bound transporters and endocytic inhibitors. The mechanisms of membrane remodeling to accommodate the addition of membrane and aqueous volume to the vacuole during FPE remain unresolved.
Endocytosis in Plants: 107-122 (2012)
http://hdl.handle.net/10261/142426
10.1007/978-3-642-32463-5_5
Fluid-Phase Endocytosis in Plant Cells