pyrenoid

简明释义

英[paɪəˈriːnɒɪd]美[ˈpaɪrəˌnɔɪd]

n. [生化] 蛋白核；[植] 淀粉核

英英释义

单词用法

同义词

反义词

例句

1.Pyrenoid shaped in ball or ellipse, was composed by protein.

蛋白核为球形或椭圆形，由蛋白质组成。

2.Pyrenoid shaped in ball or ellipse, was composed by protein.

蛋白核为球形或椭圆形，由蛋白质组成。

3.The chloroplasts of certain algae contain a structure called a pyrenoid, which is essential for carbon fixation.

某些藻类的叶绿体中含有一个称为核糖体的结构，这对碳固定至关重要。

4.The formation of a pyrenoid is often linked to the organism's ability to thrive in high CO2 environments.

形成核糖体通常与生物体在高二氧化碳环境中生存的能力有关。

5.The study revealed that the pyrenoid plays a critical role in the metabolic processes of the algae.

研究表明，核糖体在藻类的代谢过程中发挥着关键作用。

6.In some species, the pyrenoid can be found surrounded by a starch sheath.

在一些物种中，核糖体可以被淀粉鞘包围。

7.Researchers are studying the role of the pyrenoid in enhancing photosynthetic efficiency in microalgae.

研究人员正在研究核糖体在提高微藻光合作用效率中的作用。

作文

The world of biology is filled with fascinating structures and processes that contribute to the diversity of life on Earth. One such structure that often goes unnoticed is the pyrenoid, a small but significant organelle found in certain algae and some other photosynthetic organisms. The pyrenoid plays a crucial role in the process of carbon fixation, which is essential for the survival of these organisms and, by extension, the entire ecosystem. Understanding the function and importance of the pyrenoid can provide insights into how photosynthetic organisms adapt to their environments and contribute to the global carbon cycle.The pyrenoid is typically located within the chloroplasts of algae and is associated with the enzyme ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBisCO). This enzyme is responsible for capturing carbon dioxide from the atmosphere and converting it into organic compounds during photosynthesis. The presence of the pyrenoid enhances the efficiency of this process by concentrating carbon dioxide around RuBisCO, thereby facilitating a more effective conversion of inorganic carbon into organic matter. This is particularly important in aquatic environments where carbon dioxide levels can fluctuate.In addition to its role in carbon fixation, the pyrenoid is also involved in the storage of starch. Many algae utilize the products of photosynthesis not just for immediate energy needs but also for long-term storage. The pyrenoid acts as a site for starch granule formation, allowing these organisms to store carbohydrates that can be used during periods of low light or nutrient scarcity. This ability to store energy is vital for the survival of algae in fluctuating environmental conditions.Interestingly, the structure and function of the pyrenoid can vary significantly among different species of algae. Some species possess a well-defined pyrenoid, while others may have a more diffuse structure. This variability reflects the diverse evolutionary adaptations of algae to their specific habitats. For instance, some freshwater algae have adapted their pyrenoid structures to maximize carbon fixation in low-light conditions, whereas marine algae might optimize their pyrenoid for higher light availability.The study of the pyrenoid is not only important for understanding basic biological processes but also has implications for biotechnology and environmental science. Researchers are exploring the potential of harnessing the mechanisms of the pyrenoid to improve the efficiency of carbon capture in bioengineering applications. By mimicking the natural processes that occur in algae, scientists hope to develop new strategies for mitigating climate change through enhanced carbon sequestration.In conclusion, the pyrenoid is a remarkable organelle that plays a pivotal role in the life of photosynthetic organisms. Its contributions to carbon fixation and starch storage underscore the intricate relationships between organisms and their environments. As we continue to explore the complexities of biological systems, the pyrenoid serves as a reminder of the wonders of nature and the importance of preserving our planet's diverse ecosystems. Understanding such structures not only enriches our knowledge of biology but also highlights the potential for innovative solutions to some of the most pressing challenges facing humanity today.

生物学的世界充满了迷人的结构和过程，这些结构和过程为地球上的生命多样性做出了贡献。其中一个常常被忽视的结构是pyrenoid，它是某些藻类和其他一些光合生物中发现的一种小而重要的细胞器。pyrenoid在碳固定过程中发挥着至关重要的作用，这对这些生物的生存以及整个生态系统的生存至关重要。理解pyrenoid的功能和重要性可以提供关于光合生物如何适应其环境并对全球碳循环做出贡献的见解。pyrenoid通常位于藻类的叶绿体内，并与酶核酮糖-1,5-二磷酸羧化酶/氧化酶（RuBisCO）相关联。这种酶负责从大气中捕获二氧化碳，并在光合作用过程中将其转化为有机化合物。pyrenoid的存在通过在RuBisCO周围浓缩二氧化碳，从而提高该过程的效率，因此促进无机碳转化为有机物质的更有效过程。这在水生环境中尤为重要，因为二氧化碳水平可能会波动。除了在碳固定中的作用外，pyrenoid还参与淀粉的储存。许多藻类不仅利用光合作用的产物满足即时能量需求，还用于长期储存。pyrenoid作为淀粉颗粒形成的场所，使这些生物能够储存可在低光或营养匮乏期间使用的碳水化合物。这种储存能量的能力对于藻类在波动的环境条件下的生存至关重要。有趣的是，不同藻类物种的pyrenoid的结构和功能可能会显著不同。有些物种具有明确的pyrenoid，而其他物种可能具有更弥散的结构。这种变异反映了藻类对其特定栖息地的多样进化适应。例如，一些淡水藻类已经调整了其pyrenoid结构，以在低光条件下最大化碳固定，而海洋藻类可能会优化其pyrenoid以适应更高的光照条件。对pyrenoid的研究不仅对理解基本生物过程重要，而且对生物技术和环境科学也具有重要意义。研究人员正在探索利用pyrenoid机制来改善碳捕集效率的潜力。在模仿藻类中发生的自然过程的过程中，科学家们希望开发出新的策略，通过增强碳封存来减轻气候变化。总之，pyrenoid是一种非凡的细胞器，在光合生物的生活中发挥着关键作用。它对碳固定和淀粉储存的贡献突显了生物体与其环境之间错综复杂的关系。当我们继续探索生物系统的复杂性时，pyrenoid提醒我们自然的奇迹以及保护我们星球多样生态系统的重要性。理解这些结构不仅丰富了我们对生物学的知识，而且突显了应对当今人类面临的一些最紧迫挑战的创新解决方案的潜力。