Flower Development and Anatomy of Agapanthus praecox ssp. orientalis (Leighton) Leighton  

作　　者：ZHANG Di SHEN Xiao-hui ZHUO Li-huan 

机构地区：[1]Department of Ornamental Plant and Horticulture, College of Landscape Architecture, Northeast Forestry University, Harbin 150040, P.R. China [2]Department of Landscape Science and Engineering, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, P.R.China

出　　处：《Agricultural Sciences in China》2011年第9期1365-1373,共9页中国农业科学（英文版）

基　　金：supports from the Research Fund for the Doctoral Program of Higher Education of China (200802250010);the National Natural ScienceFoundation of China (30571475);the Key Project of the Shanghai Agricultural Committee (2010-6-2, 2006-4-9)

摘　　要：Floral buds of Agapanthus praecox ssp. orientalis were observed under dissecting and optical microscope to characterize floral organs development and to study relationships between anther development and microsporogenesis. Floral organs differentiation was comprised of 6 distinct stages including nought differentiation, inflorescence bud differentiation, floret primordia differentiation, tepal primordia differentiation, stamen primordia differentiation, and pistil primordia differentiation. Six tepals differentiated almost simultaneously which cross arranged in space and appeared in hexagonal distribution pattern. Six stamens were differentiated inside the tepals at the same time. Finally, 3 carpel primordia differentiated and formed syncarpous pistil. The whole process of floral bud differentiation took approximately 40 d with the first 3 stages developing more slowly than the later 3 stages. Morphology and color of the anther underwent obvious changes during the period between stamen primordia differentiation and anther maturation. Microspores also underwent significant development during this same interval. The relationship between the process of microsporogenesis and anther development has already been made clear by the sauash techniaue.Floral buds of Agapanthus praecox ssp. orientalis were observed under dissecting and optical microscope to characterize floral organs development and to study relationships between anther development and microsporogenesis. Floral organs differentiation was comprised of 6 distinct stages including nought differentiation, inflorescence bud differentiation, floret primordia differentiation, tepal primordia differentiation, stamen primordia differentiation, and pistil primordia differentiation. Six tepals differentiated almost simultaneously which cross arranged in space and appeared in hexagonal distribution pattern. Six stamens were differentiated inside the tepals at the same time. Finally, 3 carpel primordia differentiated and formed syncarpous pistil. The whole process of floral bud differentiation took approximately 40 d with the first 3 stages developing more slowly than the later 3 stages. Morphology and color of the anther underwent obvious changes during the period between stamen primordia differentiation and anther maturation. Microspores also underwent significant development during this same interval. The relationship between the process of microsporogenesis and anther development has already been made clear by the sauash techniaue.

关 键 词：Agapanthus praecox ssp. orientalis floral organs floral bud differentiation MICROSPOROGENESIS 

分 类 号：S512.1[农业科学—作物学] TN915.5[电子电信—通信与信息系统]