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相关概念视频

Introduction to Plant Diversity02:22

Introduction to Plant Diversity

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From Water to Land
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Non-vascular Seedless Plants02:26

Non-vascular Seedless Plants

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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.
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Introduction to Seed Plants03:40

Introduction to Seed Plants

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Most plants are seed plants—characterized by seeds, pollen, and reduced gametophytes. Seed plants include gymnosperms and angiosperms.
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Light Acquisition02:16

Light Acquisition

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In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.
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Pollination and Flower Structure02:40

Pollination and Flower Structure

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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.  
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The Angiosperm Life Cycle02:39

The Angiosperm Life Cycle

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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.
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相关实验视频

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A 3D Printed Pollen Trap for Bumble Bee Bombus Hive Entrances
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植物学:一个破纪录的花粉弹射器.

Joan Edwards1, Dwight Whitaker, Sarah Klionsky

  • 1Department of Biology, Williams College, Williamstown, Massachusetts 01267, USA. joan.edwards@williams.edu

Nature
|May 13, 2005
PubMed
概括

布奇的狗树木.

科学领域:

  • 植物生物学 植物生物学
  • 生物力学 生物力学
  • 生物物理学的生物物理.

背景情况:

  • 自然界的快速运动往往利用储存的弹性能量.
  • 众所周知,植物具有快速起作用的机制,但速度并未得到充分记录.

研究的目的:

  • 为了研究Cornus canadensis花的爆炸性开放背后的机制.
  • 为了量化这种植物运动的速度.

主要方法:

  • 高速视频录制Cornus canadensis花开的情况.
  • 使用生物力学原理分析爆炸物运动.

主要成果:

  • 康纳斯加拿大的花茎利用储存的弹性能量快速释放花粉.
  • 花在不到0.5毫秒的时间内开放.
  • 这是迄今为止记录的最快的植物移动.

结论:

  • 加拿大角兽 (Cornus canadensis) 呈现出异常快速的爆炸性运动.
  • 弹性储能是快速植物性行动的关键机制.
  • 这一发现扩大了我们对植物生物力学和高速生物运动的理解.

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