ROOTDEV.018 - Jim Bidlack BIO 5354/4354 PLANT ANATOMY Lecture 18 Root Meristem Root Cap Root Development I Root tip and subapical meristems A Area

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Jim Bidlack - BIO 5354/4354 PLANT ANATOMY I. Root tip and subapical meristems A. Area of division - a bit back from the root tip because there is division in front of and in the back of the zone of division B. Stuff at or near the area of division (zones) 1. Central cylinder meristem zone 2. Cortical initials zone 3. Central cells zone 4. Columella mother cells zone C. Histogen theory - plant tissue derived from one massive meristem divided into precursors - meristem sometimes referred to as SUBAPICAL MERISTEM 1. Dermatogen ===> protoderm ===> epidermis 2. Plerome (central cylinder zone) ===> procambium ===> vascular tissue 3. Periblem (cortical initials) ===> ground meristem ===> ground tissue 4. Calyptrogen (columella) ===> root cap D. Types of subapical meristems 1. Closed (2-4 zones: 2. Open (subapical meristem can be hard to distinguish) - LVP a)
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This note was uploaded on 03/27/2012 for the course BIO 5354 taught by Professor Bidlack during the Fall '11 term at University of Florida.

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