BISC208 Lecture Notes - Lecture 3: Symplast, Lysimeter, Photometer
16 May 2016
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Document Summary
Composed of specialized cells that create tubes through which materials can flow through plants. Efficient and controlled distribution of water and nutrients. Two types of vascular tissue are xylem and phloem. All living things need water to stay alive. Turgor: water pressure inside cell vacuole gives support. Why do plants waste so much water? for evaporative cooling nutrient uptake carbon dioxide entry. Moves across the cortex and endodermis before it reaches the xylem. Path of least resistance through a root to reach the xylem. Water can move across the root via three different pathways. One path never enters the cell (amploplastic) other two involve movement across a membrane (symplastic and transmembrane) Apoplastic: involves travel through the cell wall or extracellular fluid. Symplastic: involves travel only through the cytoplasm including the plasmodesmata. The symplast: transport in plants takes place through both living and nonliving cells. The combines cytosol of all living cells in a plant is called the symplast.
