01:119:100 Lecture Notes - Lecture 20: Meristem, Casparian Strip, Root Cap
12 Jul 2015
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Bio lecture 20 11/13/12 plant nutrition chapter 35. Roots: anchor, absorb water and dissolve mineral nutrients, storage. Root anatomy and primary growth: apical meristem (where growth occurs, at tips of the roots. In area of maturation: short (less than 1 cm, very numerous, functions a. Increase the absorptive capacity of the root: absorption of the water, soil particles are coated with a very thin layer of water i. ii. Root hairs are in close contact with the soil particles: structure all roots have an epidermis, cortex(storage), vascuular tissue(conduction) Root cross section in an herbaceous eudicot (soft, flowering plant: epidermis, single layer of tissue, function, protection, absorption. In area of maturation produce root hairs: no cuticle in the regions of the roots hairs (waxy layer will impede water absorption, cortex. Not cover entire cell: suberin fatty, waterproof, stele 3 tissues, pericycle outermost layer, single layer of parenchyma cells, gives rise to lateral roots fig 36-7 b.
