Table 4.

Effects of drought treatments applied to the split-root system on hormone contents in poplar roots.

Hormone	Drought treatment applied to split-roots
	One side dry	Two sides dry	Two sides well-watered
tZR	0.27±0.03 B	0.13±0.03 C	0.36±0.03 A
iPR	0.91±0.06 A	0.84±0.07 A	0.96±0.07 A
cZR	0.37±0.04 A	0.38±0.04 A	0.37±0.04 A
ABA	33.81±4.75 A	40.26±5.20 A	17.11±5.48 B
SA	5648.6±681.3 A	4875.4±746.3 A	3834.1±786.7 A

Data are means (±SE), n=4 (pmoles g^–1 FW). Different letters within the same line indicate significant differences as determined using MANOVA (α=0.05).