nodulation

简明释义

英[ˌnɒdjʊˈleɪʃən]美[ˌnɑːdʒəˈleɪʃn]

n. 有节；生节块

英英释义

单词用法

同义词

反义词

例句

1.The biological effect of protectively applied nitrogen on nodulation N-fixing activity, nitrogen forms in Xyloid liquid, and amount of assimilated nitrogen in soybean were studied.

从大豆结瘤、固氮活性、木质部溶质氮形态以及植株同化氮量论证了保护性施氮的生物学效应。

2.Plant pot experiments were carried out for the recipient strains and their transconjugants to compare their nodulation ability and symbiotic nitrogen fixation efficiency.

在盆栽条件下比较研究了转基因重组根瘤菌与出发菌和参照菌的结瘤与共生固氮效率。

3.The biological effect of protectively applied nitrogen on nodulation N-fixing activity, nitrogen forms in Xyloid liquid, and amount of assimilated nitrogen in soybean were studied.

从大豆结瘤、固氮活性、木质部溶质氮形态以及植株同化氮量论证了保护性施氮的生物学效应。

4.But the application of inoculant in field was blocked as the problem of nodulation competitiveness between inoculant strains and indigenous strains was not been solved completely.

但由于人工接种剂与土著根瘤菌的竞争结瘤问题一直未得到很好解决，阻碍了这些高效固氮菌株田间应用效果的发挥。

5.Cellular immunity that includes phagocytosis, nodulation and encapsulation mediated by hemocytes is a very important part of the innate immune system in insects.

细胞免疫是昆虫天生免疫系统中很重要的部分，包括了由血细胞介导的一系列吞噬、集结和包囊等作用。

6.Nod factors are a novel general class of signal molecules produced by rhizobia, which play a key function in the initial steps of nodulation.

结瘤因子是由根瘤菌产生的一类信号分子，它们在结瘤的起始阶段发挥着十分重要的作用。

7.This paper would explore the mutagenesis of Rhizobium mutants resistant to kasugamycin, and analyse the nodulation and fixation nitrogen character of the mutants.

本文将探讨诱变对根瘤菌抗春雷霉素突变的作用，并对获得的抗性突变株的生物固氮特性进行分析。

8.A study was conducted to test the influence of different inorganic fertilizers on the nodulation and growth of Dalbergia sissoo grown in the nursery.

本文探测了无机肥对苗圃内培养的印度黄檀生长和结瘤的影响。

9.It was suggested that the lack of these leguminous nodulin genes in rice might result in its disablility for nodulation and nitrogen fixation.

推测可能是由于水稻中缺少了这些豆科结瘤素基因，导致水稻不能结瘤固氮。

10.Inoculating seeds with specific bacteria can enhance nodulation 结节形成 and improve soil fertility.

用特定细菌接种种子可以增强nodulation 结节形成并改善土壤肥力。

11.The study focused on the genetic mechanisms underlying nodulation 结节形成 in soybean plants.

这项研究集中于大豆植物中nodulation 结节形成 的遗传机制。

12.Farmers often monitor nodulation 结节形成 to ensure healthy crop growth and optimal nitrogen levels.

农民通常监测nodulation 结节形成以确保作物健康生长和最佳氮水平。

13.The process of nodulation 结节形成 is essential for the symbiotic relationship between legumes and nitrogen-fixing bacteria.

结豆科植物与固氮细菌之间的共生关系中，nodulation 结节形成 过程至关重要。

14.Research indicates that environmental factors can significantly affect nodulation 结节形成 in various plant species.

研究表明，环境因素可以显著影响各种植物物种的nodulation 结节形成。

作文

Nodulation is a fascinating biological process that plays a critical role in the nitrogen fixation of certain plants, particularly legumes. This process involves the formation of specialized structures called nodules on the roots of these plants. These nodules are essential for the symbiotic relationship between legumes and nitrogen-fixing bacteria, such as Rhizobium. The significance of nodulation (结节形成) cannot be overstated, as it directly influences the growth and productivity of leguminous crops, which are vital for sustainable agriculture and food security.The mechanism of nodulation (结节形成) begins when legumes release specific chemical signals, known as flavonoids, into the soil. These signals attract compatible nitrogen-fixing bacteria. Upon contact with the root hairs of the legume plant, the bacteria respond by producing signaling molecules called Nod factors. These Nod factors initiate a series of developmental changes in the root cells, leading to the formation of nodules.Once the nodules are established, the bacteria enter the plant's root cells, where they convert atmospheric nitrogen into ammonia, a form that the plant can utilize for growth. This process not only provides the plant with essential nutrients but also enriches the soil with nitrogen, benefiting other plants in the ecosystem. Therefore, nodulation (结节形成) is a prime example of mutualism, where both the plant and the bacteria gain advantages from their interaction.In agricultural practices, understanding nodulation (结节形成) is crucial for improving crop yields. Farmers often inoculate leguminous seeds with specific strains of Rhizobium to enhance the nodulation (结节形成) process. This practice ensures that the plants have a sufficient population of nitrogen-fixing bacteria right from germination, leading to healthier plants and better harvests.Moreover, research into nodulation (结节形成) continues to evolve, with scientists exploring genetic modifications to enhance this process further. By identifying and manipulating the genes involved in nodulation (结节形成), researchers aim to develop legume varieties that can form more effective nodules or even nodules in non-leguminous plants. Such advancements could revolutionize agricultural practices, making it possible to cultivate crops in nitrogen-deficient soils without the heavy reliance on chemical fertilizers.In conclusion, nodulation (结节形成) is a vital process that underpins the health and productivity of leguminous plants. Its implications extend far beyond individual crops, influencing agricultural sustainability and environmental health. As we continue to explore the complexities of this process, it becomes increasingly clear that enhancing nodulation (结节形成) could play a pivotal role in addressing global food security challenges. Through ongoing research and practical applications, we can harness the power of this natural phenomenon to foster a more sustainable agricultural future.

结节形成是一个迷人的生物过程，在某些植物的氮固定中起着关键作用，尤其是豆科植物。这个过程涉及在这些植物的根部形成称为结节的特化结构。这些结节对于豆科植物与固氮细菌（如根瘤菌）之间的共生关系至关重要。结节形成（nodulation）的重要性不容小觑，因为它直接影响豆类作物的生长和生产力，而豆类作物对可持续农业和粮食安全至关重要。结节形成（nodulation）的机制始于豆科植物向土壤释放特定的化学信号，称为类黄酮。这些信号吸引兼容的固氮细菌。在与豆科植物的根毛接触后，细菌通过产生称为结节因子的信号分子做出反应。这些结节因子启动根细胞的一系列发育变化，导致结节的形成。一旦结节建立，细菌便进入植物的根细胞，在那里将大气中的氮转化为氨，这是植物可以利用的生长形式。这个过程不仅为植物提供了必需的营养，还使土壤富含氮，从而惠及生态系统中的其他植物。因此，结节形成（nodulation）是互利共生的典范，植物和细菌都从它们的相互作用中获得了好处。在农业实践中，理解结节形成（nodulation）对提高作物产量至关重要。农民经常对豆类种子进行特定根瘤菌株的接种，以增强结节形成（nodulation）过程。这种做法确保植物从发芽开始就拥有足够的固氮细菌群体，从而导致更健康的植物和更好的收成。此外，对结节形成（nodulation）的研究仍在不断发展，科学家们正在探索基因改造以进一步增强这一过程。通过识别和操纵参与结节形成（nodulation）的基因，研究人员旨在开发能够形成更有效结节的豆类品种，甚至在非豆科植物中形成结节。这些进展可能会彻底改变农业实践，使在缺氮土壤中种植作物成为可能，而无需严重依赖化肥。总之，结节形成（nodulation）是支撑豆科植物健康和生产力的重要过程。其影响远远超出了单一作物，影响着农业的可持续性和环境健康。随着我们继续探索这一过程的复杂性，越来越清楚的是，增强结节形成（nodulation）可能在应对全球粮食安全挑战中发挥关键作用。通过持续的研究和实际应用，我们可以利用这一自然现象的力量，促进更加可持续的农业未来。