Back to 9.1 Structure of Plants
9.1.6 Compare growth due to apical and lateral meristems in dicotyledonous plants.
Apical Meristems |
Lateral Meristems |
Extends the length of root or stem |
Increases girth of stem
|
Cell division in in apical meristematic region |
Cell division in vascular cambium |
Growth occurs at the end of root or stem |
Growth occurs around stem |
Apical Meristem:
At each section of growth (internode), an axillury bud is left behind.
<http://www.extension.org/mediawiki/files/3/3f/Cotyledons.jpg>
Lateral Meristem:
Lateral meristem growth results in extra xylem growth in a ring inside the cambium.
Secondary phloem also grows. Tree bark is also the result of lateral meristem growth: cork cambium produces cork
<http://fig.cox.miami.edu/Faculty/Dana/trunk.jpg>
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