01:119:116 Lecture Notes - Lecture 10: Cell Wall, Auxin, Cuticle
6 Oct 2018
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Document Summary
Plant physiology (ch 35. 1- 35. 2, 36. 1, 36. 3, 36. 5, 39. 2) Stems, leaves, flowers, fruits: root system. 3 tissue systems: tissue systems, dermal. Each comprised of all three tissue systems. Roots, stems, leaves, flower parts, fruits: roots. Petiole- joins leaf to stem at node. Each organ consists of all 3 systems. 1st line of defense against physical damage, pathogens: at root hairs absorption of water and minerals c) In shoots (1) guard cells - specialized for gas exchange (2) trichomes. Desert spp prevents water loss, reflect excess sunlight. Other spp- defend against insects: ground tissue system, most of plant, cells specialized for: Storage, photosynthesis, support, short distance transport: vascular tissue system, function. Fig 35. 14 +. 17: 2 types, xylem: conducts h20 + dissolved minerals upward from roots, phloem: transports sugars. From where made (mostly leaves) to where needed (usually roots and sites of growth: h20 movement throughout xylem. Soil root tissue root xylem stem xylem leaf xylem leaf mesophyll stomata atmosphere.
