Abscission Zones

ROOTS

 

Abscission Zone Doughnuts on non-woody roots.

 

 

 

 

 

 

 

 

 

STEM

On these leaf stems of Pin Oak, you can see the green tissues and see that the abscission zone did not form.  It's spring and these are from the summer before.  I broke them off on 03-23-03.

 

 

 

 

 


 

Tree which the samples above came from. 

03-23-03

 

 

 

 

 

 

 

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John A. Keslick, Jr.