花的紫外线吸收区域对紫外线辐射有塑性反应
Liberty A Gray1,2, Sandra Varga1, Carl D Soulsbury1
1School of Life and Environmental Sciences University of Lincoln Lincoln UK.
Plant-environment interactions (Hoboken, N.J.)
|June 7, 2023
概括
花朵可以调整它们的紫外线保护片区域,以应对增加的太阳紫外线 (UV) 辐射. 这种快速适应有助于植物适应不断变化的紫外线条件,这对于在不同的环境中生存至关重要.
科学领域:
- 植物生物学 植物生物学
- 生态生态学 生态生态学
- 摄影生物学 摄影生物学
背景情况:
- 太阳紫外线 (UV) 辐射会影响植物发育和花的表现.
- 吸收紫外线的花图案通常与环境紫外线暴露水平相关.
- 在高紫外线条件下,花紫外线吸收的塑性变化能力在很大程度上仍未被探索.
研究的目的:
- 调查Brassica rapa花是否可以塑性地增加紫外线吸收的花区域,以应对升高的紫外线辐射.
- 为了确定紫外线辐射强度和暴露时间对花紫外线吸收的影响.
主要方法:
- 紫外线植物在受控条件下种植,具有不同的紫外线辐射强度 (控制,低,高) 和暴露时间.
- 在整个开花期间,花定期采样花.
- 量化了花上紫外线吸收面积的比例.
主要成果:
- 在高紫外线辐射强度和更长的暴露时间下,吸收紫外线的花面积显著增加.
- 随着时间的推移,在长时间暴露于高紫外线的植物的花中观察到紫外线吸收面积的减少.
- 鲜花表现出塑性反应,即使在短期的紫外线照射后,紫外线吸收也会增加.
结论:
- 布拉西卡拉帕花对紫外线辐射呈现出快速的塑性反应,增加了吸收紫外线的花面积.
- 这种适应机制使得花朵能够适应不同的紫外线强度和持续时间.
- 这种反应对于动态紫外线环境和气候变化场景下的植物生存至关重要.
相关概念视频
02:00Photoreceptors and Plant Responses to Light
20.5K
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.
20.5K
01:02Ultraviolet and Visible (UV–Vis) Spectroscopy: Overview
2.8K
Ultraviolet–visible (UV–visible or UV–Vis) spectroscopy is an analytical technique that investigates the interaction between matter and UV–Vis light within the electromagnetic spectrum. This method is widely used for its versatility, simplicity, and relatively quick data acquisition, making it valuable for both qualitative and quantitative analysis. When UV–Vis radiation passes through a material, molecules absorb light depending on the energy required for...
2.8K
01:32UV–Vis Spectroscopy of Conjugated Systems
7.1K
Organic compounds with conjugated double bonds show strong absorption features in the UV–visible region of the electromagnetic spectrum attributed to π → π* electronic excitations. Generally, a UV–vis absorption spectrum is recorded as a plot of absorbance vs wavelength. The wavelength of maximum absorbance, which manifests as a peak in the absorption spectrum, is denoted as λmax.
One of the factors influencing λmax is the extent...
One of the factors influencing λmax is the extent...
7.1K
01:14UV–Vis Spectrometers
1.4K
The absorbance of UV and visible (UV–visible) radiations is measured using a UV–visible spectrophotometer. Deuterium lamps, which emit UV radiation, and tungsten lamps, which produce radiation in the visible region, are used as light sources in UV–visible spectrophotometers. A monochromator or prism is used for diffraction grating, i.e., to split the incoming radiation into different wavelengths. A system of slits is used to focus the desired wavelength on the sample cell.
1.4K
01:30UV–Vis Spectrum
1.2K
When light passes through a substance, a portion of the light is absorbed while the remaining light is reflected or transmitted. If the molecule absorbs light between the wavelengths of 180–400 nm range, the UV spectrum is obtained, and if it absorbs light in the 400–780 nm wavelength range, the visible spectrum is obtained.
The UV–Vis spectrum of a molecule is the plot of its absorbance versus wavelength. The plot is drawn by taking molar...
The UV–Vis spectrum of a molecule is the plot of its absorbance versus wavelength. The plot is drawn by taking molar...
1.2K
02:16Light 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