升高的CO2度会增强碳和的新陈代谢以及Ormosiahosiei的生物质积累
Yi Wei1, Mingbin Wang1, Man Wang1
1College of Forestry, Guizhou University, Guiyang, China.
Plant physiology and biochemistry : PPB
|May 21, 2024
概括
像Ormosia hosiei这样的豆类树可以在二氧化碳 (CO2) 水平升高的情况下通过增强和碳代谢来维持光合作用,从而增加生物质积累.
科学领域:
- 植物生理学 植物生理学
- 环境科学 环境科学
- 生物化学 生物化学
背景情况:
- 较高的二氧化碳度可能会因缺而抑制光合作用.
- 豆类植物可能具有减轻这些影响和维持生长的机制.
研究的目的:
- 为了研究Ormosia hosiei幼苗对二氧化碳度升高的生理和代谢反应.
- 确定O. hosiei能否克服潜在的限,并适应大气二氧化碳水平的变化.
主要方法:
- 两岁的O. hosiei树苗在开放式室中暴露在三种二氧化碳度 (400,600和800μmol·mol-1) 中,持续了146天.
- 测量包括光合作用参数 (LSP,LCP,AQE,Rd,Vcmax,Jmax,Amax),碳水化合物代谢酶活动 (SPS,SS,INV) 和同化酶活动 (GS,GOGAT,GDH).
主要成果:
- 升高的CO2显著增加了光合作用速率 (Amax,Vcmax,Jmax) 和光利用效率 (LSP,LCP,AQE).
- 同化酶活动 (GS,GOGAT,GDH) 增加,增强合成和改变形式.
- 碳水化合物代谢发生了转变,糖酸盐合成酶 (SPS) 活性增加,糖合成酶 (SS) 和逆转酶 (INV) 活性改变,改善碳/平衡和利用效率.
- 生物质积累,特别是在地面上,在二氧化碳升高的情况下增加,而根生物质没有受到影响.
结论:
- 奥尔莫西亚霍西伊通过增强光合作用能力和代谢来表现出适应高二氧化碳度的能力.
- 观察到的代谢调整支持持续增长和生物质积累,表明对未来气候条件的弹性.
- 该研究表明,O. hosiei可以在实验期间在没有显著的光合作用下调的情况下应对升高的CO2.
更多相关视频
09:38Single-throughput Complementary High-resolution Analytical Techniques for Characterizing Complex Natural Organic Matter Mixtures
Published on: January 7, 2019
8.6K
07:22Author Spotlight: Unraveling the Role of Earthworms in Enhancing Mineral Weathering for CO2 Removal
Published on: November 10, 2023
3.4K
相关概念视频
The 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
Overview of Metabolism
29.9K
Living cells constantly carry out various chemical reactions which are necessary for their proper functioning. These reactions are interlinked to one another via multiple pathways. The collection of these chemical reactions is known as metabolism.
Plant Metabolism
Sunlight, the primary source of energy in plants, is first absorbed by the chlorophyll pigments present in their leaves. Plants then use this energy to carry out photosynthesis, where water is oxidized into oxygen and carbon dioxide...
Plant Metabolism
Sunlight, the primary source of energy in plants, is first absorbed by the chlorophyll pigments present in their leaves. Plants then use this energy to carry out photosynthesis, where water is oxidized into oxygen and carbon dioxide...
29.9K
C4 Pathway and CAM
45.4K
Most plants use the C3 pathway for carbon fixation. However, some plants, such as sugar cane, corn, and cacti that grow in hot conditions, use alternative pathways to fix carbon and conserve energy loss due to photorespiration. Photorespiration is the process that occurs when the oxygen concentration is high. Under such conditions, the rubisco enzyme in the Calvin cycle binds O2 instead of CO2, which halts photosynthesis and consumes energy.
C4 Pathway
The C4 pathway is used by plants such as...
C4 Pathway
The C4 pathway is used by plants such as...
45.4K
Oxygen Transport in the Blood
2.7K
Hemoglobin (Hb) is a crucial molecule in the human body, consisting of four polypeptide chains, each bound to an iron-containing heme group. This unique structure enables hemoglobin to bind to oxygen, with each molecule capable of combining with four molecules of oxygen, leading to rapid and reversible oxygen loading. When fully loaded with oxygen, it is called oxyhemoglobin, while hemoglobin that has released oxygen is called reduced hemoglobin or deoxyhemoglobin. As hemoglobin binds oxygen,...
2.7K
Bioremediation
18.3K
Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
18.3K
Chemical Factors Affecting Respiration Centers
1.1K
Chemical factors such as changing CO2, O2, and H+ levels in arterial blood play a critical role in influencing respiration depth and rates. These variations are detected by chemoreceptors—specialized sensors located in two primary body areas. Central chemoreceptors are found throughout the brain stem, including the ventrolateral medulla, while peripheral chemoreceptors are located in the aortic arch and carotid arteries.
CO2 has a potent influence on respiration and is strictly regulated....
CO2 has a potent influence on respiration and is strictly regulated....
1.1K
