Water stress treatments decreased LWP
in ‘Khao Nam Phueng’ pummelo, followed by
noticeable flowering after rewatering. Meanwhile,
flowering also occurred in trees treated with PBZ
without any noticeable decrease in LWP which
indicated that this chemical can induce flowering
of pummelo without causing much stress through
withholding water. The TNC in the leaves
increased after withholding water and decreased
after rewatering and then further decreased during
flushing, while TN decreased slightly after
withholding water and increased again in the
flushing period. The change in the C/N ratio was
similar to the change in the TNC. The C/N ratio in
PBZ treated trees was not different from water
stressed trees throughout the experiment. The urea
application combined with water stress also
induced early flowering regardless of the higher
leaf TN than in other treatments.