ABA is a plant hormone that acts in the guard cells to cause closure of the stomata. Under what conditions is ABA produced?

+2 votes

 

  

ABA is produced in the roots in response to drought stress.

  

Strong light causes ABA production.

  

ABA is produced each day at sunset as the light levels decrease.

  

ABA is produced in response to pathogenic fungi that are able to enter leaves through open stomata.

 

asked Dec 31, 2012 in Biology by anonymous
    

1 Answer

+1 vote

 

ABA is produced in the roots in response to drought stress.

 

answered Dec 31, 2012 by Panda ~Expert~ (1,557 points)



...