Using the methods of physiological,biochemical mensuration and the stable isotope analysis technique,we studied the regulative effects of the exogenous GA_3 on the growth,photoassimilate and sucrose-metabolizing enzymes.The effects of gibberellic acid on photoassimilate reallocation pattern of the Populus×euramericana 'Nanlin895' cutting seedling were explored.The results showed as follows:
1.With the increase of GA_3 concentration,exogenous GA_3 promoted the increase of the plant height and g...