auxin

简明释义

英[ˈɔːksɪn]美[ˈɔːksɪn]

n. [生化] 植物生长素；植物激素

英英释义

单词用法

同义词

反义词

例句

1.Auxin is one of the most important plant hormones in that it regulates almost all aspects of plant growth and development.

生长素是最重要的植物激素之一，参与了植物生长发育的各个方面。

2.Isolation and identification the auxin binding protein is one of the major works in the studying of auxin receptor.

分离、鉴定与生长素结合的蛋白是生长素受体研究中的一个重要方面。

3.Apical buds produce a growth hormone called auxin.

顶芽分泌出叫做生长素的生长类激素。

4.It seems that sodium lignate could be used as a kind of auxin for rooting success.

由此看来，木素酸钠可能是一种促进生根的植物生长素。

5.It has been reported that ARF gene expression was not effected by auxin concentration.

已有报道说ARF基因的表达都不受生长素浓度的影响。

6.Choosing one-factor auxin was adverse to buds subculture multiplication of Lily, for example NAA or IAA.

使用单因子的生长素naa或IAA不利于百合的继代增殖。

7.Auxin also causes the plant to develop a vascular system, to form lateral roots, and to produce ethylene.

生长素还能使植物形成维管系统，形成侧根，并产生乙烯。

8.Many plants may thrive in extra light but light also destroys auxin.

许多植物可以茁壮成长，但额外光灯也摧毁了生长素。

9.The plant's growth was significantly affected by the levels of auxin.

植物的生长受到生长素水平的显著影响。

10.Researchers discovered that auxin promotes cell elongation in stems.

研究人员发现生长素促进茎部细胞的延长。

11.In agricultural practices, auxin is often used to enhance root development.

在农业实践中，生长素常用于增强根系发育。

12.The application of auxin can lead to more robust plant structures.

施用生长素可以导致植物结构更为坚固。

13.Scientists are studying how auxin interacts with other hormones in plants.

科学家们正在研究生长素与植物中其他激素的相互作用。

作文

In the world of botany, understanding plant hormones is crucial for comprehending how plants grow and respond to their environment. One of the most important plant hormones is auxin, which plays a significant role in various growth processes. Auxin is primarily responsible for cell elongation, apical dominance, and the regulation of fruit development. It is fascinating to observe how this single hormone can influence multiple aspects of a plant's life cycle. The discovery of auxin dates back to the early 20th century when scientists began to explore the effects of plant growth substances. The term auxin itself originates from the Greek word 'auxein,' which means 'to grow.' This reflects the hormone's primary function in promoting growth. One of the most well-known types of auxin is indole-3-acetic acid (IAA), which is produced in the tips of shoots and roots. As the plant grows, auxin is transported downwards, influencing the growth of cells below it. One of the most remarkable features of auxin is its role in phototropism, the growth of plants toward light. When a plant is exposed to light from one direction, auxin accumulates on the shaded side, causing those cells to elongate more than those on the illuminated side. This unequal growth results in the bending of the plant toward the light source. Such adaptations are vital for maximizing photosynthesis, allowing the plant to thrive in its environment. Another critical function of auxin is its involvement in apical dominance, which is the phenomenon where the main central stem of the plant grows more vigorously than the side stems. This is largely due to the concentration of auxin produced at the apex of the plant. When the apical bud is removed, the concentration of auxin decreases, allowing lateral buds to grow and produce a bushier appearance. This mechanism shows how auxin not only promotes growth but also regulates the overall architecture of the plant. Moreover, auxin plays a pivotal role in the development of fruits. It is involved in the processes of fruit set, growth, and maturation. For example, during the early stages of fruit development, auxin is produced by the developing seeds, which stimulates the surrounding tissues to grow and develop into mature fruit. This relationship highlights the interconnectedness of plant hormones and their collective impact on plant development. Furthermore, auxin has applications in agriculture and horticulture. Farmers and gardeners often use synthetic auxin formulations to promote rooting in cuttings, enhance fruit set, and regulate growth patterns. Understanding how auxin works allows for better management of crop production and can lead to increased yields. In conclusion, auxin is a vital plant hormone that influences numerous aspects of plant growth and development. From phototropism to apical dominance and fruit maturation, its effects are far-reaching and essential for the survival of plants. As research continues to uncover the complexities of auxin and its interactions with other hormones, our understanding of plant biology will undoubtedly deepen, paving the way for innovative agricultural practices and sustainable food production.

在植物学的世界中，理解植物激素对于理解植物如何生长和响应环境至关重要。其中最重要的植物激素之一是生长素，它在各种生长过程中发挥着重要作用。生长素主要负责细胞伸长、顶端优势和果实发育的调节。观察这种单一激素如何影响植物生命周期的多个方面，真是令人着迷。 生长素的发现可以追溯到20世纪初，当时科学家们开始探索植物生长物质的影响。生长素这个术语本身源于希腊词“auxein”，意为“生长”。这反映了该激素促进生长的主要功能。最著名的生长素类型之一是吲哚-3-乙酸（IAA），它主要在植物的芽尖和根部生成。随着植物的生长，生长素向下运输，影响其下方细胞的生长。 生长素最显著的特征之一是它在向光性中的作用，即植物朝向光源生长。当植物受到来自一个方向的光照时，生长素会在阴影面聚集，导致那些细胞比照射面上的细胞更长。这种不均匀的生长导致植物向光源弯曲。这种适应性对于最大化光合作用至关重要，使植物能够在其环境中茁壮成长。 生长素的另一个关键功能是参与顶端优势，这是植物中央主干比侧枝更强烈生长的现象。这主要是由于在植物顶端产生的生长素浓度。当去除顶端芽时，生长素浓度降低，允许侧芽生长并形成更为茂盛的外观。这一机制展示了生长素不仅促进生长，还调节植物的整体结构。 此外，生长素在果实发育中也起着关键作用。它参与果实的设置、生长和成熟过程。例如，在果实发育的早期阶段，发育中的种子会产生生长素，刺激周围组织的生长和发育成成熟果实。这种关系突显了植物激素之间的相互联系及其对植物发育的整体影响。 此外，生长素在农业和园艺中也有应用。农民和园丁常常使用合成生长素制剂来促进插穗生根、增强果实设置和调节生长模式。了解生长素的工作原理可以更好地管理作物生产，从而提高产量。 总之，生长素是一种重要的植物激素，影响植物生长和发育的众多方面。从向光性到顶端优势再到果实成熟，它的影响范围广泛，对植物的生存至关重要。随着研究不断揭示生长素及其与其他激素相互作用的复杂性，我们对植物生物学的理解无疑将加深，为创新的农业实践和可持续的食品生产铺平道路。