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916 Compare growth

Page history last edited by HL-Eun Ji 13 years, 11 months ago

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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