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相关概念视频

Introduction to Seed Plants03:40

Introduction to Seed Plants

Most plants are seed plants—characterized by seeds, pollen, and reduced gametophytes. Seed plants include gymnosperms and angiosperms.
The Angiosperm Life Cycle02:39

The Angiosperm Life Cycle

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.
Non-vascular Seedless Plants02:26

Non-vascular Seedless Plants

The diverse plant life on Earth—consisting of nearly 400,000 species—can be divided into three broad categories based on biological characteristics: nonvascular, seedless vascular, and seed plants.
Pollination and Flower Structure02:40

Pollination and Flower Structure

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.
Introduction to Plant Diversity02:22

Introduction to Plant Diversity

From Water to Land
Seedless Vascular Plants03:24

Seedless Vascular Plants

Seedless Vascular Plants Were the First Tall Plants on Earth

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相关实验视频

Updated: Jul 12, 2026

Whole-mount Clearing and Staining of Arabidopsis Flower Organs and Siliques
09:17

Whole-mount Clearing and Staining of Arabidopsis Flower Organs and Siliques

Published on: April 12, 2018

纪的血管精子花朵.

W L Crepet, D L Dilcher, F W Potter

    Science (New York, N.Y.)
    |August 30, 1974
    PubMed
    概括

    来自中欧时代的化石鲜花揭示了古老的Juglandaceae (核桃家族) 的特征. 这一发现凸显了化石生苗花对了解植物进化的重要性.

    科学领域:

    • 古植物学是古植物学.
    • 血管精植物古生物学
    • 植物进化 植物进化

    背景情况:

    • 化石血管精子花提供了关于植物进化的关键见解.
    • 北美中欧时代植物不完全理解.
    • 朱格兰地科 (核桃家族) 化石提供了早期树苗多样性的线索.

    研究的目的:

    • 为了研究中欧时代的一种血管精子猫的形态学和分类学 afinities.
    • 为了确认Juglandaceae中的花和花粉特征的古老性.
    • 强调化石花在古植物学研究中的价值.

    主要方法:

    • 详细检查化石标本的花形态.
    • 从相关的化石材料中分析花粉形态.
    • 化石结构与现存的朱格兰地科 (Juglandaceae) 属的比较.

    主要成果:

    • 研究了一种保存良好,来自北美的中欧时代猫头.
    • 花朵和花粉形态,以及状尺度结构,表明与现存的朱格兰地系结盟.
    • 这些发现代表了对这种化石猫头的首次广泛研究.

    结论:

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    Reconstructing Terrestrial Paleoclimate and Paleoecology with Fossil Leaves Using Digital Leaf Physiognomy and Leaf Mass Per Area
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    Reconstructing Terrestrial Paleoclimate and Paleoecology with Fossil Leaves Using Digital Leaf Physiognomy and Leaf Mass Per Area

    Published on: October 25, 2024

    相关实验视频

    Last Updated: Jul 12, 2026

    Whole-mount Clearing and Staining of Arabidopsis Flower Organs and Siliques
    09:17

    Whole-mount Clearing and Staining of Arabidopsis Flower Organs and Siliques

    Published on: April 12, 2018

    Scanning Electron Microscopy (SEM) Protocols for Problematic Plant, Oomycete, and Fungal Samples
    10:57

    Scanning Electron Microscopy (SEM) Protocols for Problematic Plant, Oomycete, and Fungal Samples

    Published on: February 3, 2017

    Reconstructing Terrestrial Paleoclimate and Paleoecology with Fossil Leaves Using Digital Leaf Physiognomy and Leaf Mass Per Area
    10:14

    Reconstructing Terrestrial Paleoclimate and Paleoecology with Fossil Leaves Using Digital Leaf Physiognomy and Leaf Mass Per Area

    Published on: October 25, 2024

    • 化石猫头提供了证据,证明了Juglandaceae在北美早期存在.
    • 诊断的花和花粉的特征,现代的Juglandaceae是古老的.
    • 化石血管精子花对重建植物进化历史至关重要.