hypocotyl

简明释义

英[ˌhaɪpəˈkɒtɪl]美[ˌhɪpoʊˈkɑːtl]

n. 子叶下轴，[植] 下胚轴

英英释义

单词用法

同义词

反义词

例句

1.The results of repeated inoculation experiments showed that it was feasible to screen germplasm for resistance by using the method of inoculating on hypocotyl wound and its reliability was high.

重复接种实验结果表明，利用下胚轴伤口接种法进行抗源筛选是可行的，而且可靠性较大。

2.The results of repeated inoculation experiments showed that it was feasible to screen germplasm for resistance by using the method of inoculating on hypocotyl wound and its reliability was high.

重复接种实验结果表明，利用下胚轴伤口接种法进行抗源筛选是可行的，而且可靠性较大。

3.This experiment inspected the effect of four different growth regulators on callus induction of cotyledon young leaf petiole and hypocotyl in creeping dichondra with the orthogonal design.

采用正交设计试验法，研究了四种不同生长调节剂对马蹄金子叶、片、柄和下胚轴愈伤组织诱导的影响。

4.The hypocotyl explants from 11 lines (cultivars) of Brassica napus were cultured and some factors affecting shoot regeneration were also studied.

以11个甘蓝型油菜品种(系)的下胚轴为外植体，研究影响下胚轴细胞再生的若干因素。

5.PHYA and PHYB2 showed relatively small influence on the two traits. However, PHYA and PHYB2 obviously interacted with PHYB1 to control hypocotyl elongation and anthocyanin biosynthesis.

PHYA和PHYB2对胚轴伸长和花青素合成的影响程度较小，但是与PHYB1具有明显的互作效应。

6.Methods The postprandial blood glucose and glucose tolerance were examined after healthy subjects had meal or sucrose with or without soybean hypocotyl extract.

方法健康受试者进餐或食用蔗糖时，同时服用大豆胚轴提取物，检测餐后血糖和糖耐量。

7.Cytyledons and future stalk called the hypocotyl elongate.

子叶和未来称为下胚轴的主轴延长。

8.The hypocotyl of the seedling is responsible for elevating the cotyledons above the soil.

幼苗的胚轴负责将子叶抬高到土壤上方。

9.In some plants, the hypocotyl can exhibit phototropism, bending toward light.

在某些植物中，胚轴可以表现出向光性，朝向光源弯曲。

10.The length of the hypocotyl can vary significantly between different species.

不同物种之间，胚轴的长度可能有显著差异。

11.During germination, the hypocotyl pushes through the soil to help the plant emerge.

在发芽过程中，胚轴推动植物穿过土壤以帮助其生长。

12.Researchers studied the hypocotyl growth in response to various environmental factors.

研究人员研究了胚轴在不同环境因素下的生长情况。

作文

The process of plant growth is a fascinating subject that reveals the intricate mechanisms of nature. One of the key components in the early stages of a plant's development is the hypocotyl, which plays a crucial role in supporting the seedling as it emerges from the soil. The hypocotyl is the part of the plant embryo located between the root and the cotyledons, or seed leaves. As the seed germinates, the hypocotyl elongates to push the cotyledons above the ground, allowing them to unfold and begin photosynthesis. Understanding the function of the hypocotyl can provide insights into how plants adapt to their environment. For instance, in conditions where light is scarce, such as under dense vegetation, the hypocotyl may grow longer to reach the sunlight. This phenomenon is known as etiolation, where the plant grows taller and thinner in an effort to escape the shade. Conversely, when exposed to adequate light, the hypocotyl will remain shorter and sturdier, allowing the plant to allocate more energy towards developing leaves and roots. The hypocotyl is not just a structural component; it also serves as a site for various physiological processes. For example, the hypocotyl stores nutrients that are essential for the young plant's growth until it can establish a more extensive root system. Additionally, it acts as a conduit for hormones that regulate growth and development, such as auxins and gibberellins. These hormones influence the rate at which the hypocotyl elongates and can determine the overall health and vigor of the seedling. In agricultural practices, understanding the role of the hypocotyl can help farmers optimize their planting strategies. For instance, certain crops are bred for shorter hypocotyls to prevent them from becoming leggy and weak, especially in competitive environments. By selecting seeds with desirable hypocotyl traits, farmers can improve crop yields and ensure that their plants are better equipped to thrive in their specific growing conditions. Furthermore, the study of the hypocotyl has implications in the field of biotechnology. Scientists are exploring ways to manipulate the genes responsible for hypocotyl growth to create plants that can adapt to changing climates. This research is particularly important in the context of global warming, where traditional farming methods may no longer suffice. By enhancing the resilience of the hypocotyl, researchers aim to develop crops that can withstand droughts, floods, and other environmental stresses. In conclusion, the hypocotyl is an essential part of a plant's anatomy that deserves careful study. Its role in supporting seedlings, facilitating nutrient storage, and responding to environmental cues highlights its importance in plant biology. As we continue to learn more about the hypocotyl, we gain valuable knowledge that can be applied in agriculture, conservation, and biotechnology. Understanding this small but mighty structure can lead to significant advancements in how we cultivate and sustain our food systems in the face of global challenges.

植物生长的过程是一个迷人的主题，揭示了自然的复杂机制。在植物早期发育的关键组成部分之一是胚轴，它在幼苗从土壤中出现时起着至关重要的支持作用。胚轴是位于根和子叶（或种子叶）之间的植物胚胎部分。当种子发芽时，胚轴会伸长，将子叶推到地面以上，使它们能够展开并开始光合作用。 理解胚轴的功能可以提供植物如何适应环境的见解。例如，在光线稀缺的条件下，例如在茂密的植被下，胚轴可能会生长得更长，以达到阳光。这种现象被称为黄化现象，植物努力逃离阴影而变得更高更瘦。相反，当暴露在充足的光线下时，胚轴将保持较短且更坚固，从而使植物能够将更多的能量分配给叶子和根的发育。 胚轴不仅仅是一个结构组件；它还作为各种生理过程的场所。例如，胚轴储存对幼苗生长至关重要的营养物质，直到它建立更广泛的根系。此外，它还充当调节生长和发育的激素的通道，如生长素和赤霉素。这些激素影响胚轴的伸长速率，并且可以决定幼苗的整体健康和活力。 在农业实践中，了解胚轴的作用可以帮助农民优化他们的种植策略。例如，某些作物被培育为较短的胚轴，以防止它们在竞争环境中变得细长和虚弱。通过选择具有理想胚轴特征的种子，农民可以提高作物产量，并确保他们的植物更好地适应特定的生长条件。 此外，研究胚轴在生物技术领域也具有重要意义。科学家们正在探索操纵负责胚轴生长的基因的方法，以创造能够适应气候变化的植物。这项研究在全球变暖的背景下尤为重要，因为传统的农业方法可能不再足够。通过增强胚轴的韧性，研究人员旨在开发能够抵御干旱、洪水和其他环境压力的作物。 总之，胚轴是植物解剖学中一个重要的部分，值得仔细研究。它在支持幼苗、促进营养储存和响应环境信号方面的作用突显了它在植物生物学中的重要性。随着我们继续了解胚轴，我们获得了可以应用于农业、保护和生物技术的宝贵知识。理解这个小而强大的结构可以在面对全球挑战时推动我们在如何耕作和维持食物系统方面的重大进步。