Abstract
Membrane trafficking and organelle biogenesis play important roles in plant growth and development, as well as responses to external signals. The plant endomembrane system contains several functionally distinct membrane-enclosed organelles, including the endoplasmic reticulum (ER), Golgi apparatus, trans-Golgi network (TGN) or early endosomes (EE), prevacuolar compartment (PVC) or multivesicular body (MVB) and vacuole. One of our major research programs has been focused on illustrating the underlying mechanisms of vacuolar trafficking and vacuole biogenesis and function in plant cells. One major approach has been the whole-cell electron tomography (ET) analysis with nanometer resolution of vacuole formation and distribution in different cell types of developmental stages, including root cells, stomatal lineage cells and developing pollens in Arabidopsis. Here I will present our recent work and models of vacuole biogenesis and function in plants from the ET analysis. Supported by grants from the Research Grants Council of Hong Kong and CUHK.
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