BIOA02H3 Lecture Notes - Lecture 10: Root Hair, Capillary Action, Semipermeable Membrane

• School: UTSC
• Department: Biological Sciences
• Course: BIOA02H3
• Professor: Ivana Stehlik

Document Summary

Basic plant needs for growth and reproduction: glucose, co2, light, h2o, h2o needed for metabolic processes, o2 needed for metabolic processes, minerals to build the organelles needed. Water and sugar transport through plants: water transport through xylem, sugar transport through phloem. Water and sugar transport through plants: water transport through xylem, three hypotheses on mechanisms of water transport ii. synthesis, total plant water transport iii. control of water transport, sugar transport through phloem i. hypotheses on mechanisms of water. The narrower a capillary is, the higher the water will move: root osmotic push; background. Osmosis (osmotic pressure: h2o moves through semipermeable membrane (e. g. cell wall) from low concentration to high concentration solution until concentration on both membrane sides are equal. Three hypotheses: capillary action: 1m, root osmotic push: 3m, transpiration: 100+ m. Total plant water transport: water enters root hairs from soil by osmosis, water moves into xylem by osmosis and transpirational pull (from the leaves)