Lecture 11 PA - Chapter 11 Secondary Xylem 1 Overview Introduction The radial and the axial systems Storied wood Growth rings Reaction Wood Wood

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 11: Secondary Xylem 1. Overview Introduction The radial and the axial systems Storied wood Growth rings Reaction Wood Wood specifics Conifers Angiosperms Identification 2. Wood Basics Secondary xylem, or wood, consists of two distinct, interlinked systems: axial and radial The axial system runs vertically in the plant and does the water conduction. Consists of mostly dead cells (tracheary elements). The radial system runs horizontally and penetrates throughout the axial system. It functions in local translocation of substances (not water). It consists of mostly living cells (parenchyma). Cells of the two systems are arranged so that they are distinct in the 3 different planes of section: transverse, radial and tangential 3. Figure. Angiosperms have hardwood. Gymnosperms have softwood. 4. Storied Wood In some wood, there is an orderly radial seriation or stacking of cells, called “storied wood”. Is most evident in a tangential section.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/15/2010 for the course BOT 4223 taught by Professor Harris during the Fall '09 term at University of Central Florida.

Page1 / 3

Lecture 11 PA - Chapter 11 Secondary Xylem 1 Overview Introduction The radial and the axial systems Storied wood Growth rings Reaction Wood Wood

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online