摘要
采用石蜡切片技术对托桂型菊花和非托桂型菊花的花发育过程以及花瓣的组织机构进行观察。结果表明:菊花的花芽分化可分为花序分化和小花分化两个阶段,托桂和非托桂型菊花的花芽分化过程在小花花冠伸长期开始出现差异,桂瓣的发育过程中组织结构的变化更类似于舌状花;成熟的桂瓣和舌状花一样,其花瓣结构均由上下表皮细胞和内部多层叶肉细胞构成,而非托桂花型菊花管状花花瓣仅有上下表皮细胞。桂瓣内层细胞旺盛的分裂能力以及发达的维管束组织可能是菊花形成托桂花型的重要原因。
We observed the floral development of anemone and non-anemone type chrysanthemum as well as the histological structures of different types of petals by paraffin section method. The results indicated that the flower bud differentiation of chrysanthemum included two stages such as the inflorescence and floret differentiation. The difference of floral development between anemone and non-anemone type chrysanthemum occurred in the stage of the elongation of floret corolla. The histological structure of disk floret in the anemone type chrysanthemum plays similarities with that of the ray floret not only at their developmental stage but also at the mature stage. They all consist of multiple cell layers including upper and lower epidermal cell layers and internal loose mesophyll cells. Nevertheless,the disk floret of the non-anemone type chrysanthemum just has the petal layout of upper and lower epidermal cell layers. In the development of the disk floret in anemone type chrysanthemum,the exuberant division activity of the internal cells of the petal and the well developed vascular tissues are probably the important reasons for the formation of the anemone.
出处
《园艺学报》
CAS
CSCD
北大核心
2010年第12期1961-1968,共8页
Acta Horticulturae Sinica
基金
国家自然科学基金项目(30871724)
公益性行业(农业)科研专项项目(200903020)
农业部‘948’滚动项目(2008-G3)
关键词
菊花
托桂花型
花发育
组织结构
chrysanthemum
anemone type
floral development
histological structure
