文献类型： 外文期刊

作者： He, Haihao ¹ ; Chen, Xinyi ¹ ; Wang, Tianye ¹ ; Zhang, Xiaoli ¹ ; Liu, Zedong ¹ ; Qu, Suping ² ; Gu, Zhijia ³ ; Huang, Meijuan ¹ ; Huang, Haiquan ¹ ;

作者机构： 1.Southwest Forestry Univ, Res & Dev Ctr Landscape Plants & Hort Flowers, State Forestry & Grassland Adm,Yunnan Engn Res Ctr, Coll Landscape Architecture & Hort Sci,Southwest R, Kunming, Yunnan, Peoples R China

2.Flower Res Inst, Yunnan Acad Agr Sci China, Kunming, Peoples R China

3.Kunming Inst Bot, Chinese Acad Sci, Key Lab Plant Biodivers & Biogeog East Asia, Kunming, Peoples R China

关键词： Impatiens uliginosa; floral development; SEM; floral development genes; floral development model; function of IuAP1 and IuDEF

期刊名称：FRONTIERS IN PLANT SCIENCE （ 2022影响因子：5.6； 五年影响因子：6.8 ）

ISSN： 1664-462X

年卷期： 2024 年 15 卷

页码：

收录情况： SCI

摘要： Impatiens uliginosa is a plant of the Impatiens, with peculiar flowers. In this study, we combined morphogenesis and molecular biology to explore its development of flowers. An analysis of basic observational data and paraffin sectioning showed that it took approximately 13 d for the floral organs to differentiate. An analysis of the development of inflorescences and floral organs by scanning electron microscopy showed that the inflorescence of I. uliginosa is a spiral raceme. The floral organs differentiated in the following order: lateral sepals (Ls), posterior sepal (Ps), anterior sepals (As), anterior petal (Ap), lateral petals (Lp), stamens (St) and gynoecium (Gy). I. uliginosa was found to have four sepals, and the connate stamens are caused by the fusion and growth of filament appendages. The results of fluorescence quantification and virus-induced gene silencing showed that I. uliginosa had its own unique model for flower development, and there was functional diversity of IuAP1 and IuDEF. Among them, IuAP1 controls the formation of bract s (Br), regulates the morphogenesis of posterior sepal, controls the anthocyanin precipitation of the anterior petals and the formation of lateral petals. IuDEF regulates the morphogenesis of lateral sepals, the length of development of the spur, and controls the size of yellow flower color plaques of the lateral petals. In this study, the process of flower development and the function of flower development genes of I. uliginosa were preliminarily verified. This study provides basic guidance and new concepts that can be used to study the development of Impatiens flowers.