peristome

简明释义

英[ˈperɪstəʊm]美[ˈperɪˌstoʊm]

n. 口缘；开口部

英英释义

单词用法

同义词

反义词

例句

1.The variational rage of indoor temperature and humidity is smaller than outdoor, and it also has positive relativity with the size of dooryard peristome.

相对室外而言，室内温湿度变化幅度更小，并且与天井的开口大小显示出明显的正相关性。

2.The variational rage of indoor temperature and humidity is smaller than outdoor, and it also has positive relativity with the size of dooryard peristome.

相对室外而言，室内温湿度变化幅度更小，并且与天井的开口大小显示出明显的正相关性。

3.When studying bryophytes, the peristome 口缘 is an important feature to observe.

在研究苔藓植物时，观察peristome口缘是一个重要特征。

4.The peristome 口缘 helps in the dispersal of spores by controlling their release from the capsule.

通过控制孢子的释放，peristome口缘有助于孢子的传播。

5.In many carnivorous plants, the peristome 口缘 plays a crucial role in trapping insects.

在许多食虫植物中，peristome口缘在捕捉昆虫中起着至关重要的作用。

6.The structure of the peristome 口缘 can vary significantly between different species of moss.

不同种类的苔藓之间，peristome口缘的结构可以有显著差异。

7.The peristome 口缘 of the moss is often brightly colored, attracting attention in the forest.

苔藓的peristome口缘通常色彩鲜艳，吸引森林中的注意。

作文

In the fascinating world of botany, the term peristome (周缘) refers to a specific structure found in certain mosses and liverworts. This unique feature plays a crucial role in the reproductive cycle of these plants. The peristome is essentially a ring of teeth or structures that encircle the opening of the spore capsule, known as the sporophyte. These structures are often highly specialized and can vary significantly among different species. Understanding the function and significance of the peristome can provide deeper insights into plant biology and ecology.The peristome serves several important functions. Primarily, it aids in the dispersal of spores, which are essential for the reproduction of mosses. When the spore capsule matures, the peristome teeth open and close in response to humidity levels. On dry days, the teeth will open wider, allowing for the release of spores into the air. Conversely, when it is humid, the teeth close, preventing spore loss. This mechanism ensures that spores are released at optimal times for germination and colonization, showcasing a remarkable adaptation to environmental conditions.Moreover, the structure of the peristome can also influence the success of spore dispersal. Different moss species have evolved various types of peristomes, ranging from simple to complex arrangements. For instance, some mosses have a toothed peristome, while others may possess a smooth edge. These variations can affect how far spores travel from the parent plant. A well-adapted peristome can facilitate long-distance dispersal, allowing mosses to colonize new habitats, which is vital for their survival in changing environments.In addition to its role in reproduction, the peristome can also contribute to the overall health of the moss ecosystem. By regulating spore release, the peristome helps maintain the delicate balance of species within a given habitat. This is particularly important in ecosystems where mosses play a critical role in soil formation and moisture retention. The presence of a diverse range of moss species, each with its unique peristome structure, can enhance biodiversity and promote resilience against environmental stressors.Studying the peristome offers valuable insights into evolutionary processes. Researchers can examine how different peristome structures have developed over time in response to environmental pressures. This research not only enriches our understanding of plant evolution but also informs conservation efforts aimed at protecting moss habitats. As climate change continues to impact ecosystems worldwide, understanding the reproductive strategies of mosses through their peristome structures becomes increasingly important.In conclusion, the peristome is a remarkable adaptation that plays a vital role in the life cycle of mosses. Its functions in spore dispersal and ecological balance highlight the intricate relationships within plant communities. By appreciating the significance of the peristome, we gain a deeper respect for the complexity of nature and the importance of preserving our planet's biodiversity. As we continue to explore the wonders of the natural world, let us remember the small yet significant structures like the peristome that contribute to the grand tapestry of life.

在植物学的迷人世界中，术语peristome（周缘）指的是某些苔藓和肝苔植物中发现的特定结构。这一独特特征在这些植物的繁殖周期中发挥着至关重要的作用。peristome本质上是环绕在孢子囊开口周围的一圈牙齿或结构，这被称为孢子体。这些结构通常高度专业化，并且在不同物种之间可能显著变化。理解peristome的功能和重要性可以为植物生物学和生态学提供更深刻的见解。peristome发挥着几个重要功能。首先，它有助于孢子的传播，而孢子对苔藓的繁殖至关重要。当孢子囊成熟时，peristome的牙齿会根据湿度水平打开和关闭。在干燥的日子里，牙齿会打开得更宽，从而允许孢子释放到空气中。相反，当湿度较高时，牙齿会关闭，以防止孢子流失。这一机制确保了孢子在最佳时间释放，以便萌发和定植，展示了对环境条件的显著适应。此外，peristome的结构也可以影响孢子传播的成功与否。不同的苔藓物种已经进化出各种类型的peristomes，从简单到复杂的排列。例如，一些苔藓具有锯齿状的peristome，而其他苔藓可能则拥有光滑的边缘。这些变化可能会影响孢子从母植物传播的距离。一个良好适应的peristome可以促进远距离传播，使苔藓能够定殖新的栖息地，这对它们在变化环境中的生存至关重要。除了在繁殖中的作用外，peristome还可以促进苔藓生态系统的整体健康。通过调节孢子的释放，peristome帮助维持特定栖息地内物种的微妙平衡。这在苔藓在土壤形成和水分保持中发挥重要作用的生态系统中特别重要。每种具有独特peristome结构的苔藓物种的多样性，可以增强生物多样性，并促进对环境压力的抵御能力。研究peristome提供了对进化过程的宝贵见解。研究人员可以检查不同peristome结构如何随着时间的推移对环境压力作出反应而发展。这项研究不仅丰富了我们对植物进化的理解，还为保护旨在保护苔藓栖息地的努力提供了信息。随着气候变化继续影响全球生态系统，通过其peristome结构理解苔藓的繁殖策略变得越来越重要。总之，peristome是一种显著的适应性结构，在苔藓的生命周期中发挥着至关重要的作用。它在孢子传播和生态平衡中的功能突显了植物群落内部的错综复杂关系。通过欣赏peristome的重要性，我们对自然的复杂性和保护地球生物多样性的必要性有了更深刻的尊重。当我们继续探索自然界的奇迹时，让我们记住像peristome这样的小而重要的结构，它们为生命的宏伟织锦做出了贡献。