授粉和CPPU对猕猴桃内源激素水平及果实发育的影响

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

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。

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.