早竹花粉形态与生物学特性

Studies on morphology and biological characteristics of pollen from Phyllostachys praecox

通过对早竹花粉形态与生物学特性的观测 ,研究早竹花而不实的原因。通过对早竹花粉形态、花粉活力、花粉萌发率、柱头授粉能力和花粉管生长的观察测定 ,得出 :①早竹花粉为近球形 ,具单一萌发孔 ,外壁纹饰为颗粒状 ;②早竹花粉萌发率低下 ,柱头自然授粉能力弱是导致早竹花而不实的主要原因之一 ;③早竹花粉管生长速度较快 ,最高可达 3 44μm·min-1。从而为早竹人工授粉和实行杂交育种等研究提供参考依据。图 9表 5参

The cause of flower abortion of Phyllostachys praecox was studied by observation and determination of pollen morphology,vigour,germination rate,pollination capability of stigma and growth of pollen tube.The results are as follows:①Pollen of Ph. praecox is ellipsoidal,with single germination aperture and granular exospore.②Low germination rate of pollen and weak natural pollination capability of stigma are main factors causing flower abortion of Ph. praecox.Its pollen tube has rapid growth speed and the maximum speed is 3 44 μm per minute.This paper offered reference basis for artificial pollination and cross breeding of Ph. praecox.