highly significantP < 0.01
Highly significant differences were found between POP2 and POP1 ( t = −5.33, P < 0.01), POP3 and POP1 ( t = 6.18, P < 0.01), PO P 4 and POP1 ( t = −5.96, P < 0.01), and POP5 and P OP1 ( t = 4.83, P < 0.01) ( Fig. 2 ).
Highly significant differences were found between POP2 and POP1 ( t = −5.33, P < 0.01), POP3 and POP1 ( t = 6.18, P < 0.01), PO P 4 and POP1 ( t = −5.96, P < 0.01), and POP5 and P OP1 ( t = 4.83, P < 0.01) ( Fig. 2 ).