BIOL 1020 Lecture 33: Lecture 33

• School: University of Manitoba
• Department: Biological Sciences
• Course: BIOL 1020
• Professor: Joy E.Stacey

Document Summary

Plant nutrition: from these they can produce organic molecules. Vascular plant nutrition: water and minerals obtained by young growing root hairs. Root hairs are the zone of differentiation: root hairs are tubular unicellular outgrowths of the root epidermis, life span of 2-7 days. Lateral transport in tissues and organs: transmembrane. Repeated crossing of the plasma membrane: symplast. Solutes and water move from cell to cell via plasmodesmata: apoplast. Extracellular (inter) pathway through the cell walls and extracellular spaces. The plant has no control of the movement of water and solutes. Lateral transport of water and minerals by a root: water and minerals enter the root from the soil by the root epidermis. Root hair zone: cross the cortex. Apoplast: enter vascular cylinder root xylem up the stem. Examples of essential minerals in plants: nitrogen. Nucleic acids: dna and rna have nitrogen as a major component. Amino acids: have an ammonia group which is important to the structure of amino acids.