光流密度和光周期会影响完全扩展的白植物的生长和二次新陈代谢
Luigi d'Aquino1, Rosaria Cozzolino2, Livia Malorni2
1Italian National Agency for New Technologies Energy and Sustainable Economic Development (ENEA), Portici Research Centre, Piazzale E. Fermi 1, 80055 Portici, Italy.
Foods (Basel, Switzerland)
|July 27, 2024
概括
较高的光强度 (380 μmol·m−2·s−1) 提高了白的产量,但光周期和光谱对生长,叶绿素或挥发性化合物的影响最小. 叶子的位置影响非挥发性代谢物比照明条件更多.
科学领域:
- 园艺科学 园艺科学
- 植物生理学 植物生理学
- 农业技术 农业技术
背景情况:
- 玄米 (Ocimum basilicum L.) 的室内栽培对于全年供应至关重要.
- 优化环境因素,如光谱,光合成光子流量密度 (PPFD) 和光周期是最大化产量和质量的关键.
- 了解这些因素对玄米生长,叶绿素含量和二次新陈代谢的影响,对于高效的室内养殖至关重要.
研究的目的:
- 为了研究不同光强度和光周期对室内种植玄米的生长,叶绿素含量和二次新陈代谢的影响.
- 确定最佳的照明条件,以最大限度地提高香的产量,并可能影响其化学成分.
- 在不同的光处理下分析挥发性和非挥发性有机化合物.
主要方法:
- 在受控的白光条件下,在微观宇宙设备中培养.
- 治疗包括不同的PPFD水平 (250和380μmol·m−2·s−1) 和光周期 (16/8小时光/黑暗和24/0小时光/黑暗).
- 使用多变量数据分析分析了生长参数 (生物质,身高),叶绿素含量以及挥发性 (VOC) 和非挥发性代谢物.
主要成果:
- 较高的PPFD (380 μmol·m−2·s−1) 与较低的PPFD (250 μmol·m−2·s−1) 相比,显著增加了新鲜和干燥的生物质.
- 在不同治疗方法之间没有观察到植物高度或叶绿素含量指数的显著差异.
- 挥发性有机化合物 (烯,化物,酒精,,) 在很大程度上保持一致,其中林纳醇,尤卡利普托尔和尤根醇占主导地位. 非挥发性代谢物显示出基于叶子位置的分离,分别在较低和较高的PPFD中分别含有较高的sesquiterpenes和monoterpenes. 较长的光周期显示,非挥发性代谢物分离率较低,但VOC过度表达.
结论:
- 将PPFD增加到380μmol·m−2·s−1对于增加室内生产中玄米生物质是有益的.
- 光周期长度和光谱似乎对玄米的生长,叶绿素含量和整体挥发性化合物概况的影响有限.
- 叶子的位置是一个比照明条件更重要的因素,用于确定玄米中非挥发性代谢物质的概况.
相关概念视频
02:45Biological Clocks and Seasonal Responses
34.6K
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.
34.6K
02:00Photoreceptors and Plant Responses to Light
20.3K
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.
20.3K
02:16Light Acquisition
8.4K
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.
8.4K
02:12Short-distance Transport of Resources
15.9K
Short-distance transport refers to transport that occurs over a distance of just 2-3 cells, crossing the plasma membrane in the process. Small uncharged molecules, such as oxygen, carbon dioxide, and water, can diffuse across the plasma membrane on their own. In contrast, ions and larger molecules require the assistance of transport proteins due to their charge or size. Transport across membranes also occurs within individual cells, playing a variety of essential roles for the plant as a whole.
15.9K
01:46The Calvin Benson Cycle
4.5K
Ribulose 1,5- bisphosphate carboxylase/oxygenase (RuBisCo) is a critical enzyme that catalyzes carbon dioxide assimilation during photosynthesis. However, it is an inefficient enzyme, having an extremely slow catalytic rate. A typical enzyme can process about a thousand molecules per second; however, RuBisCo fixes only around three-carbon dioxides per second. Photosynthetic cells compensate for this slow rate by synthesizing very high amounts of RuBisCo, making it the most abundant single...
4.5K