Wednesday, September 19, 2012

Family Relationships


Monocotyledons
  • It only has one seed leaf.
  • New roots arise from aborted radicles.
  • The first shoot that emerges from monocot plants is  epicotyl, this is where the first leaves and shoots emerge.
  • Monocots have a distinctive arrangement of vascular tissue known as an atactostele in which the vascular tissue is scattered rather than arranged in concentric rings. 


Examples:
corn
wheat
ginger
banana
sugarcane


Dicotyledons

  • They have two seed leaves.
  • Their roots grow from apical meristem  and the radicle.
  • Many dicots have epigeal emergence. This is where the hypocotyl elongates and becomes arched in the soil.
  • In dicots, the hypocotyl  appears to be the base under the spent withered cotyledons, and the shoot just above that is the epicotyl. 
Examples:
figs
celery
beans 
pease

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