anabaena

简明释义

英[ˌænəˈbiːnə]美[ˌænəˈbinə]

n. 项圈藻；淡水藻类的一种

英英释义

单词用法

同义词

反义词

例句

1.The toxicity effect of 6 carbamic ester pesticides on Anabaena flos-aquae was studied.

以水华鱼腥藻为材料研究了6种氨基甲酸酯类农药对藻类的毒性效应。

2.The algae responsible for the problems in Wales, Anabaena spirioides, has a 50% chance of being toxic.

在威尔士引起麻烦的海藻——螺旋鱼腥藻(Anabaena spirioides)——其有毒的概率为50%。

3.It was found that the mutant of Anabaena siarnensis which was obtained from monoclonal culture of spaceflight Anabaena is of higher growth rate and photosynthetic efficiency than the ground control.

对经空间飞行搭载而获得的暹罗鱼腥藻突变株的分析发现，与对照相比，它在生长率和光合效率方面明显较高。

4.It can effectively remove Anabaena by coagulation, cell lysis and biodegradation.

通过凝聚、细胞裂解和生物降解作用能有效去除鱼腥藻细胞。

5.It was found that the mutant of Anabaena siarnensis which was obtained from monoclonal culture of spaceflight Anabaena is of higher growth rate and photosynthetic efficiency than the ground control.

对经空间飞行搭载而获得的暹罗鱼腥藻突变株的分析发现，与对照相比，它在生长率和光合效率方面明显较高。

6.The ultrastructure of vegetative cells of blue-green alga, Anabaena cycadae, in the coralloid root of Cycas revoluta has the general characteristics of the cyanophycean cells.

苏铁珊瑚状根中蓝藻营养细胞的超微结构具一般蓝藻细胞的特征。

7.Cyanobacteria bloom in Tai Lake, mainly composed of Microcystis aeruginosa, Anabaena flos-aquae and Aphanizomenon flos-aquae, is one of the main pollutants in Tai Lake in summer.

太湖水华蓝藻主要由铜绿微囊藻、水华鱼腥藻和水华束丝藻等藻类组成，是太湖流域的夏季主要污染物之一。

8.Researchers discovered that anabaena can produce toxins harmful to fish.

研究人员发现anabaena可以产生对鱼类有害的毒素。

9.In some lakes, anabaena blooms can lead to water quality issues.

在某些湖泊中，anabaena的繁殖会导致水质问题。

10.The presence of anabaena indicates a high level of nutrients in the water.

水中存在anabaena表明营养物质水平很高。

11.The study focused on the role of anabaena in nitrogen fixation in aquatic ecosystems.

这项研究集中在anabaena在水生生态系统中固氮的作用。

12.Aquatic biologists often monitor anabaena populations to assess ecosystem health.

水生生物学家经常监测anabaena种群以评估生态系统健康。

作文

In the vast world of microorganisms, one genus that stands out is anabaena. This fascinating group of cyanobacteria, often referred to as blue-green algae, plays a significant role in aquatic ecosystems. Anabaena can be found in freshwater environments, where it contributes to the nitrogen cycle through a process known as nitrogen fixation. This ability allows anabaena to convert atmospheric nitrogen into a form that is usable by plants, thus promoting growth and sustaining life in various aquatic habitats.The structure of anabaena is particularly interesting. These organisms typically form filamentous chains, which are composed of individual cells that can differentiate into specialized forms. One such form is the heterocyst, a unique cell type that provides an anaerobic environment for nitrogen fixation to occur. This adaptation is crucial because the enzyme responsible for nitrogen fixation, nitrogenase, is sensitive to oxygen. By forming heterocysts, anabaena ensures that it can efficiently utilize nitrogen, even in oxygen-rich environments.Moreover, anabaena has a symbiotic relationship with various plants, most notably in the case of certain species of water ferns. These plants harbor anabaena within their tissues, allowing them to benefit from the fixed nitrogen that the cyanobacteria produce. In return, anabaena receives carbohydrates and a stable environment to thrive. This mutualistic interaction exemplifies the interconnectedness of life forms within ecosystems, highlighting how microorganisms like anabaena are essential for the health of their larger counterparts.However, the presence of anabaena is not always beneficial. Under certain conditions, such as nutrient enrichment from agricultural runoff, anabaena populations can explode, leading to harmful algal blooms (HABs). These blooms can deplete oxygen in the water, produce toxins harmful to aquatic life and humans, and disrupt local ecosystems. Therefore, while anabaena is a vital component of the ecosystem, its overgrowth can lead to serious environmental issues.Research on anabaena continues to uncover its potential applications in biotechnology and agriculture. Scientists are exploring ways to harness its nitrogen-fixing capabilities to reduce the need for synthetic fertilizers, which can have detrimental effects on the environment. By integrating anabaena into agricultural practices, farmers could potentially enhance soil fertility sustainably, promoting healthier crops and reducing chemical runoff into waterways.In conclusion, anabaena is more than just a simple microorganism; it is a key player in ecological processes and has significant implications for agriculture and environmental health. Understanding its biology and the roles it plays in various ecosystems can help us appreciate the delicate balance of life and the importance of preserving our natural world. As we continue to study anabaena, we may uncover new ways to leverage its capabilities for the benefit of both nature and humanity.

在微生物的广阔世界中，有一个属特别引人注目，那就是anabaena。这一迷人的蓝藻属在水生生态系统中发挥着重要作用。anabaena可以在淡水环境中找到，它通过一种称为氮固定的过程，参与氮循环。这种能力使得anabaena能够将大气中的氮转化为植物可利用的形式，从而促进生长并维持各种水生栖息地中的生命。anabaena的结构尤其有趣。这些生物通常形成丝状链，由可以分化为特殊形式的单个细胞组成。其中一种形式是异形胞，这是一种独特的细胞类型，为氮固定提供厌氧环境。这种适应性至关重要，因为负责氮固定的酶，氮酶，对氧气敏感。通过形成异形胞，anabaena确保它能够高效利用氮，即使在富含氧气的环境中。此外，anabaena与各种植物之间存在共生关系，最显著的是某些水蕨的情况。这些植物在其组织内寄生anabaena，使它们能够受益于蓝藻产生的固定氮。作为回报，anabaena获得了碳水化合物和一个稳定的生存环境。这种互利的相互作用体现了生态系统中生命形式之间的相互联系，突显了像anabaena这样的微生物对其较大同伴的健康至关重要。然而，anabaena的存在并不总是有益的。在某些条件下，例如农业径流造成的营养物质富集，anabaena的种群可能会激增，导致有害藻华（HABs）。这些藻华可以耗尽水中的氧气，产生对水生生物和人类有害的毒素，并干扰当地生态系统。因此，虽然anabaena是生态系统的重要组成部分，但其过度生长可能导致严重的环境问题。对anabaena的研究继续揭示其在生物技术和农业中的潜在应用。科学家们正在探索如何利用其氮固定能力来减少对合成肥料的需求，而合成肥料对环境可能产生不利影响。通过将anabaena融入农业实践，农民可以潜在地以可持续的方式增强土壤肥力，促进更健康的作物，并减少化学物质流入水道。总之，anabaena不仅仅是一个简单的微生物；它是生态过程中的关键角色，并对农业和环境健康具有重要意义。理解其生物学及其在各种生态系统中所扮演的角色，可以帮助我们欣赏生命的微妙平衡以及保护自然世界的重要性。随着我们继续研究anabaena，我们可能会发现利用其能力造福自然和人类的新方法。