Table 1.

The effect of irrigation treatment on leaf abscisic acid concentration (ng g^–1 dw) of split-rooted, 2-year-old containerized ‘Gale Gala’ apple trees on selected dates [day of year (DOY)].

DOY 200 was day 1 of the experiment. Irrigation was alternated between the wet and dry containers of PRD treatments on the evenings of DOY 208, 215, and 223. On DOY 215, PRD50 and DI50 were changed to PRD100 and control treatments, respectively. 

Treatment	DOY 200	DOY 203	DOY 208	DOY 211	DOY 216	DOY 221
Control	97	107 b	253 b	73 b	58	106
PRD100	110 (114)	157 b (147)	296 b (117)	88 b (120)	76 (132)	92 (87)
PRD50	107 (110)	261 a,b (244)	438 a,b (173)	221 a (302)	100 (173)	93 (87)
DI50	108 (111)	438 a (409)	774 a (306)	139 b (190)	82 (141)	93 (87)

Data are means of three replications (n=2).

Means within columns for each date followed by different letters are significantly different at P < 0.05.

Values in parentheses are treatment ABA as a percentage of control.