Flower development and anatomy of agapanthus praecox ssp. orientalis (leighton) leighton
Zhang Di, Northeast Forestry University, Harbin(China) | Shen Xiaohui, Northeast Forestry University, Harbin(China) | Zhuo Lihuan, Northeast Forestry University, Harbin(China)
Floral buds of Agapanthus praecox ssp. orientalis were observed under dissecting and optical microscope to characterizefloral organs development and to study relationships between anther development and microsporogenesis. Floral organsdifferentiation was comprised of 6 distinct stages including nought differentiation, inflorescence bud differentiation,floret primordia differentiation, tepal primordia differentiation, stamen primordia differentiation, and pistil primordiadifferentiation. Six tepals differentiated almost simultaneously which cross arranged in space and appeared in hexagonaldistribution pattern. Six stamens were differentiated inside the tepals at the same time. Finally, 3 carpel primordiadifferentiated and formed syncarpous pistil. The whole process of floral bud differentiation took approximately 40 d withthe first 3 stages developing more slowly than the later 3 stages. Morphology and color of the anther underwent obviouschanges during the period between stamen primordia differentiation and anther maturation. Microspores also underwentsignificant development during this same interval. The relationship between the process of microsporogenesis andanther development has already been made clear by the squash technique.
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