cotyledonary

简明释义

英[ˈkɒtɪliːdəʊnəri]美[ˈkɑːtɪliːdoʊnəri]

adj. 子叶的

英英释义

单词用法

同义词

反义词

例句

1.Changes of endogenous hormones and polyamines (PAs) contents during floral differentiation (0-6 day) in cucumber cotyledonary nodes cultured in vitro were determined by using HPLC.

用高效液相色谱法(HPLC)测定了黄瓜子叶节花芽分化期(0 - 6天)内源激素及多胺的变化。

2.Then embryogenic cell divided into two cells, which sequentially differentiated through multicell proembryo, globular, heart-shaped and cotyledonary embryo stages.

胚性细胞分裂产生两个细胞，进而分化发育成多细胞原胚、球形胚、心形胚及子叶胚。

3.Changes of endogenous hormones and polyamines (PAs) contents during floral differentiation (0-6 day) in cucumber cotyledonary nodes cultured in vitro were determined by using HPLC.

用高效液相色谱法(HPLC)测定了黄瓜子叶节花芽分化期(0 - 6天)内源激素及多胺的变化。

4.During germination, the cotyledonary 子叶的 leaves provide essential nutrients to the developing plant.

在发芽过程中，子叶的叶子为发育中的植物提供必需的营养。

5.In botany, the cotyledonary 子叶的 leaves are crucial for the initial photosynthesis of the plant.

在植物学中，子叶的叶子对植物的初始光合作用至关重要。

6.The classification of plants often involves examining their cotyledonary 子叶的 characteristics.

植物的分类通常涉及检查它们的子叶的特征。

7.The seedling displayed a distinct cotyledonary 子叶的 leaf structure, indicating its early development stage.

这株幼苗显示出明显的子叶的叶片结构，表明其早期发育阶段。

8.Some plants have multiple cotyledonary 子叶的 leaves, which can affect their growth patterns.

一些植物有多个子叶的叶子，这可能会影响它们的生长模式。

作文

In the world of botany, understanding the different parts of a plant is crucial for both enthusiasts and professionals alike. One term that often comes up in discussions about plant development is cotyledonary, which refers to the first leaves that appear on a seedling as it germinates. These leaves are not true leaves; instead, they serve a vital role during the early stages of a plant's life. They are essentially the plant's initial source of nutrition, helping it to survive before it develops its true leaves and begins photosynthesis. The significance of cotyledonary leaves can be observed in various plant species, highlighting their importance in the plant kingdom.When a seed germinates, it breaks through the soil, and the first structures that emerge are typically the cotyledonary leaves. In many dicotyledonous plants, such as beans or sunflowers, these leaves are broad and can often be mistaken for the plant's actual leaves. However, they differ significantly in structure and function. For instance, while true leaves have a complex arrangement of veins and a larger surface area for photosynthesis, cotyledonary leaves are primarily designed to store nutrients that the seed has absorbed from its parent plant.The process of germination is fascinating, as it marks the transition from dormancy to active growth. During this time, the cotyledonary leaves play a pivotal role in ensuring the seedling's survival. They provide essential energy until the plant can develop a more sophisticated system for capturing sunlight and converting it into energy through photosynthesis. This initial phase of growth is critical, as it determines whether the young plant will thrive or succumb to environmental pressures.Moreover, the number of cotyledonary leaves can vary among plant species, which is a distinguishing feature between monocots and dicots. Monocots, such as grasses, typically have one cotyledonary leaf, while dicots have two. This difference not only aids in classification but also influences the overall morphology and growth patterns of the plants. Understanding these distinctions can help botanists and horticulturists make informed decisions when cultivating various plant species, ensuring optimal growth conditions and care practices.In addition to their biological significance, cotyledonary leaves have also captured the interest of researchers studying plant evolution and adaptation. By examining the characteristics of these leaves across different species, scientists can gain insights into how plants have evolved to survive in diverse environments. For example, some plants have developed thicker cotyledonary leaves to store more nutrients, allowing them to endure longer periods of drought or nutrient-poor soils.In conclusion, the term cotyledonary encapsulates a fundamental aspect of plant biology that is essential for understanding plant growth and development. These initial leaves are not only crucial for the young plant's survival but also provide valuable information about the plant's evolutionary history and adaptability. As we continue to explore the intricate world of botany, the significance of cotyledonary leaves will undoubtedly remain a focal point for both scientific research and practical applications in agriculture and horticulture.

在植物学的世界中，理解植物的不同部分对爱好者和专业人士来说都是至关重要的。一个常常出现在植物发育讨论中的术语是cotyledonary，它指的是幼苗在发芽时出现的第一片叶子。这些叶子并不是真正的叶子；相反，它们在植物生命的早期阶段发挥着重要作用。它们本质上是植物最初的营养来源，帮助植物在发育出真正的叶子并开始光合作用之前生存下来。cotyledonary叶子的意义可以在各种植物物种中观察到，突显了它们在植物王国中的重要性。当种子发芽时，它突破土壤，首先出现的结构通常是cotyledonary叶子。在许多双子叶植物中，如豆类或向日葵，这些叶子是宽大的，常常被误认为是植物的实际叶子。然而，它们在结构和功能上有显著差异。例如，真正的叶子具有复杂的脉络排列和更大的光合作用表面积，而cotyledonary叶子主要设计用于储存种子从母体植物吸收的营养。发芽过程是迷人的，因为它标志着从休眠到主动生长的过渡。在这个时期，cotyledonary叶子在确保幼苗生存方面发挥着关键作用。它们提供必要的能量，直到植物能够发展出更复杂的系统来捕捉阳光并通过光合作用将其转化为能量。这一初始生长阶段至关重要，因为它决定了幼苗是否会繁荣还是屈服于环境压力。此外，cotyledonary叶子的数量因植物物种而异，这是单子叶植物和双子叶植物之间的一个区分特征。单子叶植物，如草类，通常有一片cotyledonary叶，而双子叶植物有两片。这种差异不仅有助于分类，还影响植物的整体形态和生长模式。理解这些区别可以帮助植物学家和园艺师在培育各种植物物种时做出明智的决定，确保最佳的生长条件和护理实践。除了生物学意义外，cotyledonary叶子还引起了研究植物进化和适应性的研究人员的兴趣。通过检查不同物种中这些叶子的特征，科学家可以深入了解植物如何在多样化的环境中生存。例如，一些植物已经发展出更厚的cotyledonary叶，以储存更多的营养，使它们能够在干旱或贫瘠土壤中忍受更长时间。总之，术语cotyledonary概括了植物生物学的一个基本方面，对于理解植物的生长和发育至关重要。这些初始叶子不仅对幼苗的生存至关重要，而且提供了关于植物进化历史和适应性的宝贵信息。随着我们继续探索植物学的复杂世界，cotyledonary叶子的意义无疑将继续成为科学研究和农业及园艺实践的焦点。