A plant is NOT watered for seven days (day 1 - day 7 ). Leaf and root water potential are measured every two hours starting from day 1 till day 7 . Which one of the following is LEAST LIKELY to happen?
1
Pre-dawn leaf water potential declines over the 7 days.
2
Leaf water potential shows a diurnal cycle of highs and lows.
3
Root water potential falls below leaf water potential at night.
4
Root water potential fluctuates between day and night.