授粉和CPPU对猕猴桃内源激素水平及果实发育的影响

秦美猕猴桃花期不授粉，果实于花后５－２０ ｄ全部脱落。不授粉，但花前 ＣＰＰＵ处理，果实可延迟５ ｄ脱落，维持１６．７％的果不落，但果实于花后５ ｄ起停止发育。花后 ５－ １０ ｄ未授粉果 ＺＲｓ。ＧＡｌ＋３含量低于对照，但ＡＢＡ水平高于对照。花后２０ ｄ ＣＰＰＵ处理果实显著增大，对内源激素水平影响不大。处理后２０ ｄ内 ＺＲｓ、ＤＨＺＲ升高，处理后５ ｄ ＩＡＡ、 ＧＡＩ＋ ３下降， １０ ｄ后上升。 ＡＢＡ水平在花后６０－ １００ ｄ降低，采前升高。对种子、内源激素在果实发育中的作用进行了讨论。

Influence of Pollination and CPPU on Fruit Development and the Level of Endogenous Hormones of Kiwifruit

All the fruits of 'Qinmei' (Actinidia deliciosa C. F. Liang et A. R. Ferguson)fell 5 - 20 d after full blossom(AFB) when pollination was prevented by bagging the flowers Mire anthesis. The application of CPPU delayed the fruit abscission for 5 d and 16. 7% fruit-set rate was obtained. But the retained fruit stopped enlargement 5 d AFB. The level of ZRs and GAl+3 in unpollinated fruit was lower during 5- 10 d AFB and ABA higher. The size of in treated with CPPU at 20 d AFB was significantly bigger compared with that of control. But the level of endogenous hormones did not change remarkably. ZRs and DHZR was higher within 20 d after treatment.The content of IAA and GA1+3 was down first and up 5 d later. ABA content was lower during 60- 100 d AFB and higher before harvest. The role of seeds and hormones in fruit development was discussed.