bracts

简明释义

英[/brækts/]美[/brækts/]

n. [植]苞片（bract 的复数）；[植]苞叶

英英释义

单词用法

同义词

反义词

例句

1.Leaves, bracts, sepals and outside of petals minutely papillose.

叶，苞片，萼片和花瓣均为磨砂质感。

2.A tree (Cornus florida) of eastern North America, having small greenish flowers surrounded by four large, showy white or pink bracts that resemble petals.

多花梾木是一种长于北美东部的乔木，开小而呈淡绿色的花，周围有四片大而艳丽的白色或粉红色类…

3.Kasalukuyang cultivars sa pink bracts green spot gilid pagputol-, kundi magkaroon ng pundamental na.

目前栽培品种的粉红色苞片尖端带有绿色斑点，但是瑕不掩瑜。

4.The author considers that the morphological characters of bracts, flowers and fruits are the main taxonomic features for Tragopogon L.

并对该属植物作了外部形态的比较，认为总苞片、花和果实的形态特征是婆罗门参属植物的主要分类依据。

5.These plants are valued for their colorful bracts, which look like leaves.

这种植物因其彩色苞片而有价值，这些苞片看起来像叶片。

6.In the greenhouse this plant can become very invasive, and nurseries consider it a pest. Leaves and bracts detach and root easily and produce multitudes of new plantlets.

这种植物在温室和苗圃入侵性会变得极强，认为它是一种有害植物。叶片和苞片脱落后，容易生根并产生大量新植株。

7.Current cultivars with pink bracts green spot cutting-edge, but have fundamental.

目前栽培品种的粉红色苞片尖端带有绿色斑点，但是瑕不掩瑜。

8.Fruit oblate 1.7cm in diameter base with persistent bracts and sepals.

果扁球形，直径1。7厘米，基部托以宿存苞片和萼片。

9.The unique shape of the bracts 苞片 on this plant makes it stand out in the garden.

这种植物上独特形状的bracts 苞片使其在花园中脱颖而出。

10.The bracts 苞片 of the poinsettia are often red and used in holiday decorations.

圣诞红的bracts 苞片通常是红色的，并用于节日装饰。

11.Some plants have bracts 苞片 that serve to protect the flowers during their development.

一些植物的bracts 苞片在花朵发育期间起到保护作用。

12.In some species, the bracts 苞片 can be mistaken for flowers due to their vibrant colors.

在某些物种中，bracts 苞片由于其鲜艳的颜色可能被误认为是花。

13.The colorful bracts 苞片 of the bougainvillea plant attract many gardeners.

五彩斑斓的bracts 苞片吸引了许多园丁。

作文

In the world of botany, many terms are used to describe the various parts of plants and their functions. One such term is bracts, which refers to modified leaves that are often associated with flowers or inflorescences. Unlike regular leaves, bracts can serve multiple purposes, including attracting pollinators, providing protection to developing flowers, and sometimes even contributing to the overall aesthetic appeal of the plant. Understanding bracts is essential for anyone interested in horticulture or plant biology. For instance, in the case of the poinsettia, a popular ornamental plant, the colorful parts that people often mistake for flowers are actually bracts. These bright red or white structures surround the small, yellow flowers and play a crucial role in attracting attention during the holiday season. The vibrant colors of the bracts help lure in pollinators and ensure the reproductive success of the plant. This phenomenon is not unique to poinsettias; many other plants also utilize bracts in similar ways. Another interesting aspect of bracts is their variability across different species. Some plants have large, showy bracts, while others may have small, inconspicuous ones. For example, in the case of the dogwood tree, the white bracts that appear in spring are often mistaken for petals. However, these bracts serve the same purpose as those of the poinsettia, helping to attract pollinators to the small, true flowers in the center. This showcases how bracts can evolve differently depending on the ecological needs of the plant. Moreover, bracts can also be found in inflorescences, which are clusters of flowers arranged on a stem. In plants like the sunflower, the outermost bracts form a protective layer around the developing flower head, ensuring that it remains safe from herbivores and environmental stressors. The presence of bracts in inflorescences highlights their role in both protection and attraction, making them vital components of many flowering plants. Additionally, the study of bracts can provide insights into plant evolution and adaptation. By examining the morphology and function of bracts across various species, researchers can better understand how plants have evolved to survive and thrive in diverse environments. This knowledge is particularly important in the context of conservation, as many plant species face threats from habitat loss and climate change. Understanding the role of bracts can aid in the development of strategies to protect these plants and their ecosystems. In conclusion, bracts are fascinating structures that play a significant role in the life cycle of many plants. They are not just simple leaves; they are multifunctional organs that contribute to the success of flowering plants in various ways. Whether through attracting pollinators, providing protection, or enhancing the visual appeal of a plant, bracts are essential for understanding plant biology and ecology. As we continue to explore the intricacies of plant life, the study of bracts will undoubtedly remain an important area of research.

在植物学的世界中，许多术语用于描述植物的不同部分及其功能。其中一个术语是苞片，指的是通常与花或花序相关的改良叶子。与普通叶子不同，苞片可以发挥多种作用，包括吸引传粉者、保护正在发育的花朵，有时甚至有助于植物的整体美感。理解苞片对任何对园艺或植物生物学感兴趣的人来说都是至关重要的。例如，在一株流行的观赏植物——一品红的情况下，人们常常误以为的彩色部分实际上是苞片。这些鲜艳的红色或白色结构环绕着小而黄色的花朵，并在节日期间发挥着吸引眼球的关键作用。苞片的鲜艳颜色帮助吸引传粉者，确保植物的繁殖成功。这种现象并非一品红特有；许多其他植物也以类似方式利用苞片。苞片的另一个有趣方面是它们在不同物种中的变异性。一些植物具有大型、显眼的苞片，而另一些植物可能只有小而不显眼的苞片。例如，在狗木树的情况下，春天出现的白色苞片常常被误认为是花瓣。然而，这些苞片与一品红的苞片具有相同的功能，帮助吸引传粉者来到中心的小型真正花朵。这展示了苞片如何根据植物的生态需求而进化出不同的形态。此外，苞片还可以在花序中找到，花序是指排列在茎上的花的簇。在向日葵等植物中，最外层的苞片形成了一层保护层，保护正在发育的花头，确保其免受食草动物和环境压力的影响。花序中苞片的存在突显了它们在保护和吸引方面的作用，使它们成为许多开花植物的重要组成部分。此外，对苞片的研究可以提供植物进化和适应的见解。通过检查不同物种中苞片的形态和功能，研究人员可以更好地理解植物是如何进化以在多样化环境中生存和繁荣的。这一知识在保护背景下尤为重要，因为许多植物物种面临栖息地丧失和气候变化的威胁。理解苞片的作用可以帮助制定保护这些植物及其生态系统的策略。总之，苞片是迷人的结构，在许多植物的生命周期中发挥着重要作用。它们不仅仅是简单的叶子；它们是多功能器官，以多种方式促进开花植物的成功。无论是通过吸引传粉者、提供保护，还是增强植物的视觉吸引力，苞片对于理解植物生物学和生态学都是至关重要的。随着我们继续探索植物生命的复杂性，苞片的研究无疑将继续成为一个重要的研究领域。