gametophyte

简明释义

英[ɡəˈmiːtəʊˌfaɪt]美[ɡəˈmiːtəˌfaɪt]

n. [生物] 配子体；配偶体

英英释义

单词用法

同义词

反义词

例句

1.The female gametophyte is reduced but larger than in angiosperms; it is not autotrophic.

裸子植物的雌配子体简化，但较被子植物体的体积大，不能自养。

2.Cross incompatibility in Zea mays is controlled gametophytically by a single locus. The gametophyte gene is located on chromosome 4 in maize.

玉米的杂交不亲和性是受单基因控制的，为配子体控制型，该基因位于玉米的第四染色体上。

3.Female gametophyte formation can be divided into two consecutive processes, namely, the occurrence and female gametophyte spores occurred.

雌配子体的形成可以划分为两个连续的过程，即孢子发生和雌配子体发生。

4.Explore the female gametophyte development in the expression of gene regulation mechanism development is important for revealing the molecular mechanism of plant.

探究雌配子体发育的基因调控表达机制对于揭示植物发育分子机制有重要意义。

5.The megasporogenesis and microsporogenesis and the development of their female and male gametophyte are partially abnormal.

在凹叶厚朴大、小孢子发生和雌、雄配子体发育过程中存在部分败育现象。

6.The application of gametophyte clone technology injects new vigor into the study of kelp breeding and seed-rearing.

配子体克隆技术的应用，给海带的育苗育种研究注入了新的活力。

7.Some plants have a reduced gametophyte 配子体 phase, which makes them more efficient in reproduction.

一些植物的gametophyte 配子体阶段缩小，这使它们在繁殖上更加高效。

8.The gametophyte 配子体 generation is crucial for sexual reproduction in plants.

在植物的有性繁殖中，gametophyte 配子体世代至关重要。

9.The life cycle of mosses includes a dominant gametophyte 配子体 stage that is responsible for producing gametes.

苔藓的生命周期包括一个主导的gametophyte 配子体阶段，负责产生配子。

10.The study of gametophyte 配子体 development can provide insights into plant evolution.

对gametophyte 配子体发育的研究可以提供植物进化的见解。

11.In ferns, the gametophyte 配子体 is usually small and heart-shaped.

在蕨类植物中，gametophyte 配子体通常小而呈心形。

作文

In the world of biology, understanding the life cycle of plants is crucial for comprehending their reproduction and growth. One of the key stages in this cycle is the formation of the gametophyte, which plays a significant role in the reproductive process of many plants, especially those in the group of bryophytes and ferns. The gametophyte is the haploid phase of the plant life cycle, meaning it contains only one set of chromosomes. This contrasts with the diploid phase known as the sporophyte, which has two sets of chromosomes. The gametophyte is responsible for producing gametes, which are the reproductive cells that unite during fertilization to form a new organism. In flowering plants, this process can be quite complex, involving both male and female gametophytes. The male gametophyte develops within the pollen grains, while the female gametophyte forms inside the ovule. This division of labor allows for more efficient reproduction, as the male gametes can be transported over distances by wind or pollinators, reaching the female gametophyte to achieve fertilization.In contrast, non-flowering plants like mosses exhibit a more straightforward method of reproduction. In these organisms, the dominant stage of the life cycle is the gametophyte, which is often the most recognizable part of the plant. Mosses have leafy structures that are actually the gametophyte generation, while the sporophyte, which grows from the gametophyte, is typically a stalk with a capsule that releases spores. This highlights the importance of the gametophyte in the life cycle of non-flowering plants, where it is not only crucial for reproduction but also for the plant's overall existence.The study of gametophytes extends beyond just understanding plant reproduction; it also offers insights into evolutionary biology. The presence of gametophytes in various plant lineages suggests that this life stage has been preserved throughout evolution due to its effectiveness in ensuring the continuation of species. Furthermore, examining how different plants develop their gametophytes can provide clues about their adaptability to different environments. For instance, certain gametophytes have evolved to thrive in extreme conditions, showcasing the incredible diversity of life forms on our planet.Moreover, the significance of gametophytes extends into ecological relationships. They often play a vital role in ecosystems, serving as a food source for various organisms and contributing to soil formation. Understanding the interplay between gametophytes and their environment can help us appreciate the delicate balance of ecosystems and the importance of conserving plant biodiversity.In conclusion, the gametophyte is more than just a phase in the plant life cycle; it is a fundamental component that influences reproduction, evolution, and ecology. By studying gametophytes, we gain a deeper understanding of how plants reproduce and adapt, as well as the intricate web of life that sustains our planet. As we continue to explore the complexities of plant biology, the gametophyte will undoubtedly remain a focal point of research and discovery.

在生物学的世界中，理解植物的生命周期对于理解它们的繁殖和生长至关重要。在这个周期中，一个关键阶段是形成配子体，它在许多植物的繁殖过程中扮演着重要角色，尤其是在苔藓和蕨类植物中。配子体是植物生命周期的单倍体阶段，这意味着它只包含一组染色体。这与称为孢子体的二倍体阶段形成对比，后者有两组染色体。配子体负责产生配子，即在受精过程中结合形成新生物的生殖细胞。在开花植物中，这一过程可能相当复杂，涉及雄性和雌性配子体。雄性配子体在花粉粒中发育，而雌性配子体则在胚珠内形成。这种分工使得繁殖更加高效，因为雄性配子可以通过风或传粉者在距离上被运输，最终到达雌性配子体以实现受精。相比之下，像苔藓这样的非开花植物展示了一种更简单的繁殖方法。在这些生物中，生命周期的主导阶段是配子体，它通常是植物最显著的部分。苔藓具有的叶状结构实际上是配子体世代，而从配子体生长出的孢子体通常是一个带有囊袋的茎，释放孢子。这突显了配子体在非开花植物生命周期中的重要性，在这些植物中，它不仅对繁殖至关重要，而且对植物的整体存在也至关重要。对配子体的研究超越了对植物繁殖的理解；它还提供了对进化生物学的见解。不同植物谱系中配子体的存在表明，这一生命阶段因其有效性而在进化过程中得以保留，从而确保物种的延续。此外，研究不同植物如何发育其配子体可以为它们适应不同环境提供线索。例如，某些配子体已经进化为能够在极端条件下生存，展示了我们星球上生命形式的惊人多样性。此外，配子体的重要性还扩展到生态关系中。它们通常在生态系统中发挥重要作用，为各种生物提供食物来源，并促进土壤形成。理解配子体与其环境之间的相互作用可以帮助我们欣赏生态系统的微妙平衡及保护植物生物多样性的重要性。总之，配子体不仅仅是植物生命周期中的一个阶段；它是一个基本组成部分，影响繁殖、进化和生态。通过研究配子体，我们深入了解植物如何繁殖和适应，以及维持我们星球的复杂生命网络。随着我们继续探索植物生物学的复杂性，配子体无疑将继续成为研究和发现的重点。