???(auxin) ???(ethylene)??? (leaf abscission)???

1
???(auxin) ???(ethylene)??? (leaf abscission)???
?????????????(shoot apical meristem)???
???????????????
????????????,??????????????,??????????????????????
??????????
??????????????
2
???(auxin) ???(ethylene)??? (leaf abscission)???
???????,???????????????
?????????????????????
3
???(auxin) ???(ethylene)??? (leaf abscission)???
?????????????(Dauxin)???,?? (ethylene)?????
C2H2
??????????(abscission layer)????????? (programmed
cell death apoptosis).
4
???(auxin) ???(ethylene)??? (leaf abscission)???
??????????????,??????????(vascular
tissue)???????(fiber cells) ?????????,?????????(?
??????????)??????????(??)??
C2H2