Table I.

Phenotypic characters of transgenic and wild-type hybrid aspen trees

LinenTree HeightStem DiameterInternode LengthLeaf WidthLeaf LengthSecondary Shoots
cm mm no.
Wild type912810.629.114519213.7
B41229.2* 33.1* 1331735.8**
C599*** 9.1* 34.1** 115** 152** 3.2***
D513111.333.8** 1321795.8***
G61279.435.0*** 125* 1736.2***
H51259.736.5** 128166* 3.6***
J513111.236.1*** 1431844.2***
L412710.234.3** 1331775.0***
O412410.933.1* 1441815.5***

Stem diameter was measured 7 cm from the base. Internode length was measured for 10 internodes subjacent to the uppermost fully expanded leaf for each tree. Leaf width and length was measured in three full-sized mature leaves for each tree. The no. of secondary shoots from axillary buds was counted 30 d after decapitation. The asterisks indicate statistical significance of difference between the means of the wild type and the transgenic line (Student's ttest); *, 0.05 > P > 0.01; **, 0.01 >P > 0.001; and ***, P < 0.001.