水竹开花生物学特性研究

Biological Characteristics Study of Phyllostachys Heteroclada's Flowering

水竹在雅安地区的开花表现为成片开花,花期较长,从当年11月开始到次年的4月结束,持续时间约5个月.自然授粉条件下,水竹结实率极低,对水竹进行人工授粉试验未能得到种子,对水竹花镜下检测发现,其花药比较丰富且花粉粒活力较高,但柱头和子房常常发育不良或者畸形,且柱头可授性也极低,几乎为零;对水竹花进行解剖检查,发现在水竹花里有大量幼虫,有虫的水竹雌雄蕊完全被破坏,推测水竹丰富的花药和花粉与雅安地区多雨潮湿的气候条件可能为该类昆虫的繁殖提供了有利条件,导致其幼虫破坏水竹雌雄蕊及花器官的发育.

The whole population flowering at the same time is the main type of Phy. Het. Olive in Ya＇ an and the flowering period lasts five months from November to April of next year. Neither pollinating with artificial ways nor natural ones made no seeds successfully. When the flower was observed under a microscope only to find that anther was rich and microspore was fertile, but the chapiter and germen were often hypogenetic or malfonned and the chapeter had low pollinating ability, even zero possibility. Many larvae were found after dissected examination of the flower resulting in destroyed stamen as well as pistil. It was inferred that the rich anther and farina as well as rainy weather of Ya＇ an area possibly provided advantageous condition for the propagation of these lanvae which resulted in they destroyed stamen as well as pistil and the growth of floral organs.