淡黄花百合珠芽发育过程的形态学与解剖学研究

以野生淡黄花百合(Lilium sulphureum)为实验材料,通过形态学观察、石蜡切片方法对珠芽的发生规律、发育过程中的形态学变化及解剖结构特征进行了研究,以阐明淡黄花百合珠芽繁殖的生物学机制。结果显示:淡黄花百合的珠芽形成于地上茎叶腋处叶柄的近基部位置,由叶柄表皮以内数层薄壁细胞不断分裂和分化形成;珠芽的发育过程可划分为启动期、膨大期和成熟期三个时期。成熟珠芽外观上成圆形或椭圆形,珠芽中部的薄壁细胞含有大量淀粉颗粒。淡黄花百合的珠芽具有很高的萌发率(90%以上)。研究表明,珠芽营养繁殖是其生态适应的一种重要机制。

Morphological Observation and Anatomical Study on Bulbil Development of Lilium sulphureum

The wild Lilium sulphureum,an important plant species that has medical and horticultural values,possesses bulbils as vegetative propagation.In this current work,we focused on the develpment of bulbil for L.sulphureum.Based on the morphological observation and anatomical study,the bulbil formation of L.sulphureum was identified.The bulbil was firstly appeared on the basal site of petiole in the axil.It originated from cells of sub-epidermal of petiole.The process of bulbil development could be divided into three stages:triggering phase,expanding phase,and ripeness phase.The maturated bulbils generally are spheral or ellipsoidal.The inner cells posses large mount of starch granule as storage assimilate.The germination rate of L.sulphureum bulbils is very high(>90%).This result showed that vegetative propagation of bulbils is an important way for ecological adaptation.