种子发芽是对日间温度波动的反应
K Thompson1, J P Grime, G Mason
1Unit of Comparative Plant Ecology, Natural Environment Research Council, Department of Botany, University of Sheffield, UK.
Nature
|May 12, 1977
概括
昼间的温度波动对于某些开花植物的发芽至关重要. 这项研究揭示了这些温度线索是息地特定的,优化了苗木的建立.
科学领域:
- 植物生物学 植物生物学
- 生态生态学 生态生态学
- 环境科学环境科学
背景情况:
- 昼间的温度波动可以触发或加快一些开花植物的种子发芽.
- 这种刺激的有效性取决于温度范围和光照条件.
- 关于这种现象在各种植物生态中的适应意义的数据有限.
研究的目的:
- 为了研究草本物种对温度波动的发芽反应.
- 评估种子发芽过程中昼间温度波动的生态意义.
- 了解温度线索如何影响不同息地种植苗的建立.
主要方法:
- 从谢菲尔德附近的本地草本植物种群收集种子.
- 在受控的波动温度条件下进行了发芽试验.
- 分析了与温度幅度和光线可用性相关的发芽成功.
主要成果:
- 对于日间温度波动的发芽要求被发现是来自特定息地的物种的特征.
- 该研究确定了温度敏感发芽与苗木建立有利条件之间的联系.
- 温度波动的有效性因振幅和光线存在而有所不同.
结论:
- 昼间温度波动在某些草本物种的发芽生态中起着重要作用.
- 这些温度线索适应特定的息地,促进及时和成功的苗木建立.
- 了解这些反应可以了解植物对环境条件的适应.
相关概念视频
01:10Transcription
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Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds...
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