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The World of Northern Evergreens$
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E. C. Pielou

Print publication date: 2011

Print ISBN-13: 9780801477409

Published to Cornell Scholarship Online: August 2016

DOI: 10.7591/cornell/9780801477409.001.0001

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The Life and Growth of a Conifer

The Life and Growth of a Conifer

(p.43) Chapter 4 The Life and Growth of a Conifer
The World of Northern Evergreens

E. C. Pielou

Cornell University Press

This chapter begins by describing the differences in conifer and broadleaf wood. In all trees, the trunk and branches contain tubes to carry liquids up and down the tree, from roots to leaves and back. The tubes leading upward, plus (in some trees) strengthening fibers, constitute the wood, technically, the xylem. Wood contains the tubes that carry water and dissolved nutrients (sap) up the tree. In conifer wood there are no continuous “tubes”; there are merely chains of long, narrow cells, known as tracheids, linked to each other through small, porous membranes. In contrast, broadleaf wood contains continuous tubes known as vessels to carry the sap. The remainder of the chapter discusses the characteristics of cut stumps and whole trees; and the functions of the cambium, leaves, and roots.

Keywords:   conifers, broardleafs, wood, coniferous trees, tracheids, xylem, cambium, leaves, roots, sap

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