在Cyperaceae中微胞和花粉粒发育的进化特征
Danilo Massuia Rocha1, Fernanda Mayara Nogueira2, Thiago André3
1Laboratório de Citogenética e Diversidade Vegetal (LCDV), Universidade Estadual de Londrina (UEL), Londrina, PR, 86057-970, Brazil. danilomassuiarocha@gmail.com.
Plant reproduction
|August 2, 2023
概括
伪虫花粉的形成是 (Cyperaceae) 的一个关键特征. 微胞发育和定位的变化提供了对家族的洞察力.
科学领域:
- 植物生殖生物学 植物生殖生物学
- 进化植物学的植物学.
- 血管精子的新生学.
背景情况:
- 塞佩拉属植物表现出独特的微粒生成,形成花粉作为伪月子.
- 伪月子发育的差异存在,但缺乏遗传学解释.
研究的目的:
- 为了研究Cyperaceae中的伪月子特征演变.
- 为伪月子发展重建祖先的性格状态.
主要方法:
- 对早期和晚期分离的属 (Hypolytrum,Eleocharis) 的比较分析.
- 光显微镜和超结构分析.
- 祖先的角色重建. 祖先的角色重建.
主要成果:
- 海波利伪月子的发育与其他同源,具有角退行性微胞子.
- 在Hypolytrum中,圆形,中央排列的伪单体代表了一个plesiomorphic特征.
- 退行性微粒体的基底定位是Rhynchospora特有的异形特征.
- 埃利奥卡里斯伪单体与其他属有共同的超结构特征,包括染色质凝结和细胞质周转变异.
结论:
- 伪人形形成是Cyperaceae中的一个synapomorphy.
- 微的发育变异为家族内部的遗传学提供了洞察力.
- 超结构的相似性支持了伪月子的同形态地位.
相关概念视频
Seed Structure and Early Development of the Sporophyte
28.4K
Seed structures are composed of a protective seed coat surrounding a plant embryo, and a food store for the developing embryo. The embryo contains the precursor tissues for leaves, stem, and roots. The endosperm and cotyledons—seed leaves—act as the food reserves for the growing embryo.
28.4K
The Angiosperm Life Cycle
65.5K
Plants have a life cycle split between two multicellular stages: a haploid stage—with cells containing one set of chromosomes—and a diploid stage—with cells containing two sets of chromosomes. The haploid stage is the gamete-producing gametophyte, and the diploid stage is the spore-producing sporophyte.
65.5K
Seedless Vascular Plants
60.6K
Seedless Vascular Plants Were the First Tall Plants on Earth
60.6K
Introduction to Seed Plants
62.3K
Most plants are seed plants—characterized by seeds, pollen, and reduced gametophytes. Seed plants include gymnosperms and angiosperms.
62.3K
Pollination and Flower Structure
65.0K
Flowers are the reproductive, seed-producing structures of angiosperms. Typically, flowers consist of sepals, petals, stamens, and carpels. Sepals and petals are the vegetative flower organs. Stamens and carpels are the reproductive organs.
65.0K
Introduction to Plant Diversity
45.0K
From Water to Land
45.0K


