地被香石竹花粉形态和生物学特性

Pollen morphologic and biological characteristics of the Dianthus caryophyllus × Dianthus chinensis

运用TTC检测法、联苯胺一过氧化氢法、电镜扫描等方法，对地被香石竹‘春之歌’的花粉形态、花粉活力、花粉萌发、柱头可授性进行观察测定。结果表明：花粉外形为近圆球形，直径约为32—45μm，具10多个萌发孔，外壁纹饰为颗粒状。散粉期的花粉生活力为49．5％，离体萌发率可达28．7％，花粉管不完全是单一萌发，柱头在绒毛1／3～3／4时可授性最强。为利用该品种进行香石竹杂交育种提供参考。

The pollen morphology, pollen viability, pollen germination, stigma receptivity and growth of pollen tube from the flower of Dianthus caryophyllus × D. chinensis ＇ Chunzhige＇ were studied by means of observation and determination, TTC method, Benzidine-H2 02 method, and so on. The results showed that the pollen of ＇ Chunzhige＇ was ellipsoidal with more than 10 germination aperture and granular exospore. The maximum of the pollen vitality was up to 49.5% and the ger- mination rate of pollen was 28.7% during pollen dispersal period. The pollen tube grew from more than single germination aperture. The pollination capability of stigma was stronger when length of the stigma fluff was from 1/3 to 3/4. This paper offered a basical reference for cross breeding in Dianthus.