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CactiBiology and Uses$
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Park Nobel

Print publication date: 2002

Print ISBN-13: 9780520231573

Published to California Scholarship Online: March 2012

DOI: 10.1525/california/9780520231573.001.0001

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PRINTED FROM CALIFORNIA SCHOLARSHIP ONLINE (www.california.universitypressscholarship.com). (c) Copyright University of California Press, 2019. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in CALSO for personal use.date: 17 October 2019

Shoot Anatomy and Morphology

Shoot Anatomy and Morphology

Chapter:
(p.22) (p.23) Chapter 2 Shoot Anatomy and Morphology
Source:
Cacti
Author(s):

Teresa Terrazas Salgado

James D. Mauseth

Publisher:
University of California Press
DOI:10.1525/california/9780520231573.003.0002

This chapter discusses the anatomy and morphology of cacti shoot, focusing primarily on its cellular characteristics and biomechanical properties. The shoot consists of internodes, nodes where leaves are attached, and axillary buds (the spine-producing areoles). The bud scales and leaves of axillary buds are the signature spines of cacti. The ability of cacti to adapt to xeric conditions is due to increases in water-storage tissue, especially in the cortex and wood, thickened cuticles, and the presence of a hypodermis. The fundamental tissue, cortex and pith, carries out two important functions related to xeric adaptations: photosynthesis and water storage.

Keywords:   cacti shoot, shoot, internodes, axillary buds, xeric conditions, cortex, wood, hypodermis, pith, photosynthesis

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