What causes guttation?

+1 vote

 

  

negative pressure in the root xylem and a higher rate of transpiration at night

  

positive pressure in the root xylem and an increased rate of transpiration at night

  

negative pressure in the root xylem and a lower rate of transpiration at night

  

positive pressure in the root xylem and a decreased rate of transpiration at night

 

asked Dec 30, 2012 in Biology by anonymous
    

1 Answer

0 votes

 

positive pressure in the root xylem and a decreased rate of transpiration at night

 

answered Dec 30, 2012 by anonymous

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