植物研究2012，Vol.32Issue(6)：651-656,6.
长角凤仙花(凤仙花科)的花器官发生和发育
Floral Organogenesis and Development of Impatiens longicornuta (Balsaminaceae)
摘要
Abstract
In the present study, the floral morphology and development patterns of Impatiens longicornuta Y. L. Chen ( Balsaminaceae) has been examined under the scanning electron microscope ( SEM) for a better understanding of floral evolution in the genus. I. longicornuta is zygomorphic flower; lateral sepals 2; lower sepal deeply saccate, abruptly constricted into an incurved spur, mouth oblique, tip acuminate; upper petal cucullate, crista apically with a long cornu; stamens 5; ovary superior; gynoecium 5-carpellate, syncarpous. Initiation of five sepal primordial is not consistent in order. The order of initiation is from two lateral sepals to adaxial primor-dium and two anterolateral sepals. Their development is not synchronous also. The two anterolateral sepals stay rudimentary and disappear in later stages. The anterior petal arises firstly, and then the four lateral petal primor-dia are initiated in two successive pairs and fused at the base in later stages. Five stamen primordia initiate nearly at the same time. Five carpel primordia arise simultaneously in whorl. The perianth of Impatiens is pentamer-ous and the standard is not petal but sepal actually. The floral organogenesis data of I. longicornuta shows the important systematic and evolutional significance.关键词
凤仙花属/花器官发生/长角凤仙花/扫描电镜Key words
Impatiens L. /floral organogenesis/Impatiens longicornuta/scanning electron microscopy分类
农业科技引用本文复制引用
蔡秀珍,刘克明,丛义艳..长角凤仙花(凤仙花科)的花器官发生和发育[J].植物研究,2012,32(6):651-656,6.基金项目
教育部高等学校博士学科点专项科研基金资助课题(20104306120008) （20104306120008）
湖南省自然科学基金资助项目(10JJ4019) （10JJ4019）
湖南省教育厅资助科研项目(09C624) （09C624）
