SCLERENC.011 - Jim Bidlack BIO 5354/4354 PLANT ANATOMY...

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Jim Bidlack - BIO 5354/4354 PLANT ANATOMY Lecture 11 - (Mechanical) Sclerenchyma NOTE: "Conducting sclerenchyma" (according to James D. Mauseth) is known as xylem. There are two kinds called tracheids and vessels. ..we'll talk about them later. For now, its MECHANICAL SCLERENCHYMA I. General characteristics of sclerenchyma ("hard" tissue) A. Sclerenchyma and collenchyma are principal supporting tissues 1. Collenchyma function in support 2. Sclerenchyma function in strength B. Sclerenchyma have thick secondary walls (with simple pits) 1. Secondary walls formed by inclusion of lignin into the CW matrix C. Where secondary walls can be found 1. Sclerified parenchyma - as transfer cells 2. Xylem - vascular bundles 3. Sclerenchyma - scattered among other cells C. Dead at maturity II. Types of sclerenchyma A. Fibers (long, slender, and unbranched)
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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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