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相关概念视频

Introduction to Plant Diversity02:22

Introduction to Plant Diversity

From Water to Land
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.
Seedless Vascular Plants03:24

Seedless Vascular Plants

Seedless Vascular Plants Were the First Tall Plants on Earth
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.
Xylem and Transpiration-driven Transport of Resources02:03

Xylem and Transpiration-driven Transport of Resources

The xylem of vascular plants distributes water and dissolved minerals that are taken up by the roots to the rest of the plant. The cells that transport xylem sap are dead upon maturity, and the movement of xylem sap is a passive process.
Fruit Development, Structure, and Function01:58

Fruit Development, Structure, and Function

Fruits form from a mature flower ovary. As seeds develop from the ovules contained within, the ovary wall undergoes a series of complex changes to form fruit. In some fruits, such as soybeans, the ovary wall dries; in other fruits, such as grapes, it remains fleshy. In some cases, organs other than the ovary contribute to fruit formation; such fruits are called accessory fruits.

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相关实验视频

Updated: Jul 7, 2026

Using High Resolution Computed Tomography to Visualize the Three Dimensional Structure and Function of Plant Vasculature
11:49

Using High Resolution Computed Tomography to Visualize the Three Dimensional Structure and Function of Plant Vasculature

Published on: April 5, 2013

古代水果科,一个新的基底血管苗家族.

Ge Sun1, Qiang Ji, David L Dilcher

  • 1Research Center of Palaeontology, Jilin University, Changchun 130026, China. sunge@jlu.edu.cn

Science (New York, N.Y.)
|May 4, 2002
PubMed
概括

新发现的Archaefructaceae家族代表了早期的草本水生木精. 这些化石可以追溯到1.24亿多年前,是所有其他生苗的姐妹类.

科学领域:

  • 古植物学是古植物学.
  • 进化生物学 进化生物学
  • 血管精子的原始发育过程

背景情况:

  • 基底生苗提供了对早期开花植物进化的关键见解.
  • 了解早期的盆栽种多样性是重建植物进化史的关键.

研究的目的:

  • 介绍和描述Archaefructaceae,这是一个新家族的基底生苗.
  • 为了确定Archaefructus liaoningensis和Archaefructus sinensis在血管精子中的遗传学位置.

主要方法:

  • 分析完整的化石植物,包括根和肥沃的芽.
  • 在家族遗传学分析中包括形态和三基因分子数据.

主要成果:

  • 建议Archaefructaceae作为一种新型的草本水生木种类的新家族.
  • 化石至少可以追溯到1.246亿年前,来自中国的易岩层.
  • 古代果实类 (Archaefructus) 种类形成了所有其他芽种的姐妹类.

结论:

  • 考古水果科 (Archaefructaceae) 是已知的最早的血管苗系之一.

更多相关视频

Generating Homo- and Heterografts Between Watermelon and Bottle Gourd for the Study of Cold-responsive MicroRNAs
07:22

Generating Homo- and Heterografts Between Watermelon and Bottle Gourd for the Study of Cold-responsive MicroRNAs

Published on: November 20, 2018

Poplar Adventitious Roots Induced by Stem Canker Pathogens: An Experimental System for Studying Roots Biology and Light Response-Related Processes
08:04

Poplar Adventitious Roots Induced by Stem Canker Pathogens: An Experimental System for Studying Roots Biology and Light Response-Related Processes

Published on: October 11, 2024

相关实验视频

Last Updated: Jul 7, 2026

Using High Resolution Computed Tomography to Visualize the Three Dimensional Structure and Function of Plant Vasculature
11:49

Using High Resolution Computed Tomography to Visualize the Three Dimensional Structure and Function of Plant Vasculature

Published on: April 5, 2013

Generating Homo- and Heterografts Between Watermelon and Bottle Gourd for the Study of Cold-responsive MicroRNAs
07:22

Generating Homo- and Heterografts Between Watermelon and Bottle Gourd for the Study of Cold-responsive MicroRNAs

Published on: November 20, 2018

Poplar Adventitious Roots Induced by Stem Canker Pathogens: An Experimental System for Studying Roots Biology and Light Response-Related Processes
08:04

Poplar Adventitious Roots Induced by Stem Canker Pathogens: An Experimental System for Studying Roots Biology and Light Response-Related Processes

Published on: October 11, 2024

  • 缺乏花和分的花结构,可以让我们深入了解血管苗的早期繁殖策略.