相关实验视频
Updated: Jul 9, 2025

08:42
Forced Flowering in Mandarin Trees under Phytotron Conditions
Published on: March 6, 2019
9.0K
森林地下层的开花现象学反应对实验性的变暖和照明
Eline Lorer1, Kris Verheyen1, Haben Blondeel1
1Forest & Nature Lab, Department of Environment, Ghent University, Geraardsbergsesteenweg 267, BE-9090, Melle-Gontrode, Belgium.
The New phytologist
|November 30, 2023
概括
森林地下植物在每摄氏度升温7天以上的时间内提前开花. 这种由微气候影响的现象变化影响着森林的生物多样性和功能.
科学领域:
- 生态生态学 生态生态学
- 植物科学 植物科学
- 气候变化生物学 气候变化生物学
背景情况:
- 作为对温度升温的反应,物种现象学会发生变化.
- 森林地下的微气候 (光线,温度) 与开放息地有很大的不同.
- 人们对地下植物对这些微气候的现象反应知之甚少.
研究的目的:
- 调查森林下层的变暖如何影响森林下层的植物现象学.
- 确定光的可用性是否调节现象学对变暖的反应.
- 评估物种的特征,如热,是否可以解释现象学敏感性.
主要方法:
- 记录了10种温带森林地下物种的开花现象 (开始,峰值,结束,持续时间).
- 利用两个中宇宙实验操纵温度 (变暖) 和光 (照明).
- 分析了与物种的热和开花时间相关的现象学敏感性.
主要成果:
- 每升温1°C,花期平均提前7.1天,超过了之前的估计.
- 适应温暖的物种显示出明显更大的现象学进步.
- 照明并没有改变温度灵敏度,但导致了鲜花的轻微独立延迟.
结论:
- 亚天花板的变暖显著推进了地下植物现象学,适应温暖的物种反应更强烈.
- 森林内的微气候缓冲对于准确的现象变化预测至关重要.
- 气候变暖和树冠干扰的综合影响可能会破坏地下社区,影响森林生物多样性和生态系统功能.
相关概念视频
Biological Clocks and Seasonal Responses
34.7K
The circadian—or biological—clock is an intrinsic, timekeeping, molecular mechanism that allows plants to coordinate physiological activities over 24-hour cycles called circadian rhythms. Photoperiodism is a collective term for the biological responses of plants to variations in the relative lengths of dark and light periods. The period of light-exposure is called the photoperiod.
34.7K
Responses to Heat and Cold Stress
13.5K
Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
13.5K
Photoreceptors and Plant Responses to Light
20.4K
Light plays a significant role in regulating the growth and development of plants. In addition to providing energy for photosynthesis, light provides other important cues to regulate a range of developmental and physiological responses in plants.
20.4K
Responses to Drought and Flooding
10.7K
Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.
10.7K
Light Acquisition
8.5K
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.
8.5K
Cell Signaling in Plants
5.6K
Plant cells communicate to coordinate their cycle of growth, flowering and fruiting, and activities in roots, shoots, and leaves in response to the changing environmental conditions. Plant signaling is distinct from animal signaling. Plants primarily utilize enzyme-linked receptors, whereas the largest class of cell-surface receptors in animals are G-protein coupled receptors (GPCRs). Unlike animals, receptor tyrosine kinases are rare in plants. Instead, plants have a diverse class of...
5.6K

