| To expl or e t he r el at i onshi p bet ween endogenous et hyl ene and cast or sex, t hi s st udy t est ed endogenous
et hyl ene cont ent soft hel eavesatdi f f er entgr owt h st agesby gaschr omat ogr aphy.The l eavescame f r om pi st i l l at e l i ne ' YC2-
S'and i t smonoeci ousi nbr ed l i ne ' YC2-F' .The r esul t sshowed t hat ,t he endogenous et hyl ene r el ease r at e ofpi st i l l at e l i ne
var i ed i n t hef or m ofi nver t ed "S"f r om t hr ee-l eafst aget of l or escenceper i od,t hati s,i tdr opped f r om 137. 9 滋L/ kg 窑 h att hr ee-
l eafst age t o 17. 5 滋L/ kg 窑 h atf i ve-l eafst age,t hen r ose sl owl y and r eached 40. 9 滋L/ kg 窑 h i n bud-emer gi ng per i od.Fi nal l y,i t
f el ldown t o 26. 9 滋L/ kg 窑 h i n f l or escence per i od.The endogenouset hyl ene r el ease r at e ofmonoeci ousl i ne showed a t r end of
U f or m,i tdecr eased f r om 149. 8 滋L/ kg 窑 h att hr ee-l eafst age t o 18. 4 滋L/ kg 窑 h atf i ve-l eafst age,t hen i ncr eased cont i nuousl y
and r eached 226. 3 滋L/ kg 窑 h i n f l or escence per i od.Ther e was no di f f er ence i n et hyl ene cont entbet ween pi st i l l at e l i ne and
monoeci ousl i nebef or esi x-l eafst age.Af t ert hi sst age,t hef i r stwentup f i r st l y,t hen downed,and t hesecond one cont i nued t o
r i se.Ther e wassi gni f i cantdi f f er ence and hi ghl y si gni f i cantdi f f er ence atbud-emer gi ng per i od and f l or escence per i od.Thi s
pr oved t hatt he f l or alpr i mor di um began t o appeari n bot h pi st i l l at e and monoeci ous l i ne att he si x-l eafst age by f r eehand
shoot -t i p sect i ons .Theabover esul t ssugges tt hatet hyl enei soneoft hekeyf act or sdet er mi ni ngcast orsext ype. |
