麻瓜 (Manihot esculentum Crantz) 根中的胡卜素组成和结合
Margit Drapal1, Tatiana M Ovalle Rivera2, Luis Augusto Becerra Lopez-Lavalle2
1School of Biological Sciences, Royal Holloway University of London, Egham, United Kingdom.
PloS one
|November 18, 2024
概括
研究人员确定了高含比β-胡卜素的木麻品种,这是一个重要的微量营养素. 这种生物强化努力提高了这种主食作物的营养价值.
科学领域:
- 植物科学 植物科学
- 生物化学 生物化学
- 营养科学 营养科学
背景情况:
- 大麻是一种重要的主食,但它的根缺乏必需的微量营养素,如β-胡卜素.
- 在许多人群中,低β-胡卜素含量限制了麻瓜的维生素A值.
研究的目的:
- 为了识别和描述高贝塔胡卜素水平的麻瓜加入.
- 为了研究贝塔胡卜素在麻瓜根中的积累的代谢和分子基础.
主要方法:
- 对血统繁殖种群的分析.
- 麻瓜根组织的代谢学,脂质学和蛋白质学分析.
- 用于测量β-胡卜素的生物化学测试.
主要成果:
- 鉴定到麻豆的加入含有高达40μg/g的DWβ-胡卜素.
- β-胡卜素的积累通过胡卜素路径的β分支发生.
- 没有观察到粉,碳水化合物或中间代谢的显著变化.
- 在胡卜素和脂质含量 (银脂) 之间发现了正相关性.
- 对粉体的蛋白质组分析揭示了与翻译和粉生物合成相关的蛋白质,而不是胡卜素合成.
结论:
- 大麻的育种可以显著提高β-胡卜素含量.
- 胡卜素积累不会破坏核心代谢途径,如粉合成.
- 胡卜素在塑性质膜中局部存在,并且可能在氨基塑体内存在塑性质球体.
- 需要进一步的研究来阐明木中胡卜素合成的精确定位和调节.
相关概念视频
C4 Pathway and CAM
45.3K
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...
45.3K
Key Elements for Plant Nutrition
18.7K
Like all living organisms, plants require organic and inorganic nutrients to survive, reproduce, grow and maintain homeostasis. To identify nutrients that are essential for plant functioning, researchers have leveraged a technique called hydroponics. In hydroponic culture systems, plants are grown—without soil—in water-based solutions containing nutrients. At least 17 nutrients have been identified as essential elements required by plants. Plants acquire these elements from the...
18.7K
Water and Mineral Acquisition
31.6K
Specialized tissues in plant roots have evolved to capture water, minerals, and some ions from the soil. Roots exhibit a variety of branching patterns that facilitate this process. The outermost root cells have specialized structures called root hairs that increase the root surface, thus increasing soil contact. Water can passively cross into roots, as the concentration of water in the soil is higher than that of the root tissue. Minerals, in contrast, are actively transported into root cells.
31.6K
The Calvin Benson Cycle
4.4K
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...
4.4K
Adaptations that Reduce Water Loss
25.1K
Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
25.1K
Seed Structure and Early Development of the Sporophyte
27.8K
Seed structures are composed of a protective seed coat surrounding a plant embryo, and a food store for the developing embryo. The embryo contains the precursor tissues for leaves, stem, and roots. The endosperm and cotyledons—seed leaves—act as the food reserves for the growing embryo.
27.8K


