ovule

简明释义

英[ˈɒvjuːl;ˈəʊvjuːl]美[ˈoʊvjuːl]

n. 胚珠；幼籽；卵细胞

英英释义

单词用法

同义词

反义词

例句

1.It is suggested that directional growth of pollen tubes are controlled by molecular signal in ovule.

实验结果说明花粉管的定向生长受胚珠的分子信号调控。

2.Development of megaspore and formation of embryo sac: the ovule has a layer of parietal cells at the sporogenous stage.

大孢子的发育及胚囊的形成：造孢时期，造孢细胞发育成大孢子母细胞。

3.And where is the position of its ovule?

胚珠生于什么位置等。

4.In present work, the development of anther, formation of pollen grain and development of ovule and formation of embryo sac in Ramie were observed.

本工作对苎麻花药的发育和花粉粒的形成、胚珠的发育和胚囊的形成进行了观察。

5.The experiment showed that ovule culture in overcoming cross-incompatibility between radish and Chinese cabbage is of significance.

试验证明胚珠培养在克服萝卜和大白菜属间杂交不亲和性方面具有一定意义。

6.In this paper, we studied the hormone level and the proteome of female-sterile clone and hoped to discover the reason of ovule abortion.

本论文分别从激素水平和蛋白质组水平对其败育机制进行了初步研究。

7.Upon further increase of the exogenous hormone concentration, new ovule primordia could be formed from the proliferated nucellus cells, which further developed into many new ovules.

进一步提高外源激素浓度，珠心细胞又可以分化出新的胚珠原基，进一步长大以后发育成许多新的胚珠。

8.Pollen morphology and hydration, ovule development, formation of pollination drop and the pollination process of Taxus chinensis (Pilg.

的花粉形态和水合特性及胚珠发育、传粉滴形成与传粉过程。

9.The fertilization of the ovule is crucial for seed development.

对胚珠的受精对于种子的发育至关重要。

10.During the reproduction process, pollen travels to the ovule.

在繁殖过程中，花粉会传递到胚珠。

11.In flowering plants, the ovule develops within the ovary.

在开花植物中，胚珠在子房内发育。

12.Each ovule can become a seed if fertilized successfully.

每个胚珠如果成功受精，就可以变成种子。

13.The structure of the ovule varies among different plant species.

不同植物物种的胚珠结构各异。

作文

The journey of life begins with the smallest units of existence, and one of the most crucial components in the reproductive process of flowering plants is the ovule. An ovule is a structure that develops within the ovary of a seed plant and is essential for the formation of seeds. Understanding the role of the ovule in plant reproduction not only highlights the complexity of nature but also emphasizes the importance of biodiversity in our ecosystems.In flowering plants, the ovule contains the female gamete, which is vital for fertilization. When pollen grains land on the stigma of a flower, they germinate and grow a pollen tube that travels down to the ovule. This process is known as pollination, and it is a critical step in the reproductive cycle. The fusion of the male and female gametes occurs inside the ovule, leading to the development of a zygote, which eventually matures into a seed. This intricate process is a remarkable example of how life perpetuates itself through various mechanisms.The significance of the ovule extends beyond mere reproduction; it plays a vital role in the genetic diversity of plant species. Each ovule carries genetic information from its parent plants, and when fertilized, it produces seeds that can exhibit a wide range of characteristics. This genetic variation is essential for the survival of species, especially in changing environmental conditions. Plants that can adapt to their surroundings are more likely to thrive, and the diversity generated through ovules contributes to the resilience of ecosystems.Moreover, the study of ovules has practical implications for agriculture and horticulture. Understanding how ovules develop and function can lead to improved crop yields and the cultivation of new plant varieties. Scientists and agriculturalists can manipulate the conditions under which ovules are fertilized or develop, enabling them to produce hybrid plants that possess desirable traits such as disease resistance or increased nutritional value.In conclusion, the ovule is a fundamental element in the reproductive cycle of flowering plants. It is not only responsible for the creation of seeds but also plays a critical role in maintaining genetic diversity and ensuring the survival of plant species. By studying ovules, we gain insight into the complexities of plant reproduction and the interconnectedness of life on Earth. As we face challenges such as climate change and habitat loss, understanding the importance of ovules and their contributions to biodiversity becomes increasingly vital. Therefore, recognizing and appreciating the role of the ovule in nature is essential for fostering a sustainable future for our planet.

生命的旅程始于最小的存在单元，而在开花植物的生殖过程中，一个至关重要的组成部分是胚珠。胚珠是种子植物的子房内发育的结构，对于种子的形成至关重要。理解胚珠在植物繁殖中的作用，不仅突显了自然的复杂性，还强调了生物多样性在我们生态系统中的重要性。在开花植物中，胚珠包含着雌性配子，这对于受精是至关重要的。当花粉粒落在花的柱头上时，它们会发芽并生长出一根花粉管，沿着它向下移动到胚珠。这个过程被称为授粉，是生殖周期中的关键步骤。雄性和雌性配子的融合发生在胚珠内部，导致合子的发展，最终成熟为种子。这个复杂的过程是生命通过各种机制自我延续的一个显著例子。胚珠的重要性不仅仅体现在繁殖上；它在植物物种的遗传多样性中也扮演着重要角色。每个胚珠携带着来自其亲本植物的遗传信息，当受精后，它会产生可以展现广泛特征的种子。这种遗传变异对于物种的生存至关重要，尤其是在环境条件变化时。能够适应其环境的植物更有可能繁荣，而通过胚珠产生的多样性有助于生态系统的韧性。此外，研究胚珠对农业和园艺具有实际意义。了解胚珠是如何发育和运作的，可以提高作物产量和新植物品种的培育。科学家和农业工作者可以操控胚珠受精或发育的条件，使他们能够生产出具有理想特征的杂交植物，例如抗病性或营养价值提高。总之，胚珠是开花植物生殖周期中的基本元素。它不仅负责种子的创造，而且在维持遗传多样性和确保植物物种的生存方面发挥着关键作用。通过研究胚珠，我们可以深入了解植物繁殖的复杂性以及地球上生命的相互联系。随着气候变化和栖息地丧失等挑战的出现，理解胚珠的重要性及其对生物多样性的贡献变得愈发重要。因此，认识和欣赏胚珠在自然界中的作用，对于促进我们星球的可持续未来至关重要。