BIOA02H3 Lecture Notes - Lecture 7: Casparian Strip, Picea Sitchensis, The Plant Cell
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BIOA02H3 Full Course Notes
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Document Summary
Conifer trees growing in the coastal rainforests of british columbia take life to extremes. Vancouver island is home to two of the tallest trees on earth: the red creek fir, measuring 73 meters high, and over 13 meters in circumference, and the sitka spruce soaring 95 meters above the forest floor. Such extremely tall trees exemplify the ability of plants to move water and solutes from roots to shoots over amazingly long distances. Plants have mechanisms for moving water and solutes. Over long distances from the root to the shoot or vice versa. Both passive and active transport mechanisms move substances across cell membranes. Substances moves with its concentration or electrochemical gradient. Diffusion is simplest form of passive transport. In electrochemical gradients, membrane potential measures the charge differences. The water potential of pure water is 0 megapascals (no solutes, and at standard. Water moves from high to low water potential.
