01:119:116 Lecture Notes - Lecture 10: Casparian Strip, Apoplast, Endodermis
22 Apr 2016
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Document Summary
Success of plants depends on their ability to gather resources from their environment and transport them to where they are needed: vascular plants have adaptations for acquisition (h2o, minerals, co2, light) and. Transport (h2o, minerals and sugars: key to success: maximize photosynthesis, minimize water loss. Root structure and mechanisms for uptake of water and minerals: root anatomy. No root hairs bc it would impede h2o absorption. Regulates movement of water + minerals into xylem. Surrounds endodermis cells not in cell wall. Cylinder contains xylem and phloem: water potential ( psi) - measured in megapascals (mpa) zae (fungi) Indirectly up surface area of roots for absorbing. Free energy of water - amount of e available to do work. = 0 mpa: pure water at sea level at room temperature. High : more potential energy to perform work when water moves. Decreases when solutes are dissolved in water. Solute molecules and ions bind to h2o molecules.
