pulvinus

简明释义

英[pʌlˈvaɪnəs]美[pʌlˈvaɪnəs]

n. [植] 叶枕；呈鼓突状

复 数 p u l v i n i

英英释义

单词用法

同义词

反义词

例句

1.Effects of FC on abscission of bean pulvinus explants varied with its concentration used.

不同浓度的壳梭孢素(Fc)对菜豆叶枕外植体的脱落效应不同，低浓度促进、高浓度抑制。

2.Effects of FC on abscission of bean pulvinus explants varied with its concentration used.

不同浓度的壳梭孢素(Fc)对菜豆叶枕外植体的脱落效应不同，低浓度促进、高浓度抑制。

3.In many plants, the pulvinus helps in the rapid closing of flowers at night.

在许多植物中，脊垫帮助花朵在夜间快速闭合。

4.During the day, the pulvinus keeps the leaves open to maximize photosynthesis.

白天，脊垫使叶子保持开放，以最大化光合作用。

5.Researchers are studying how the pulvinus functions in various species.

研究人员正在研究不同物种中脊垫的功能。

6.The pulvinus is crucial for the movement of leaves in response to light.

对于叶子响应光线的运动，脊垫是至关重要的。

7.The sensitivity of the pulvinus allows plants to adapt to their environment.

由于脊垫的敏感性，植物能够适应其环境。

作文

The term pulvinus refers to a swollen, cushion-like structure found at the base of the petiole in certain plants. This unique anatomical feature plays a crucial role in the movement and orientation of leaves and flowers, allowing them to respond to environmental stimuli such as light and gravity. The pulvinus is particularly well-studied in legumes, where it facilitates rapid leaf movements, known as nyctinasty, which occur in response to the onset of darkness. This adaptation not only helps optimize photosynthesis during the day but also protects the plant from herbivores at night by folding its leaves. In addition to its role in movement, the pulvinus also serves a structural purpose. It provides support to the leaf or flower, enabling it to maintain an optimal angle for sunlight capture. The presence of this structure can be observed in various species, including Mimosa pudica, commonly known as the sensitive plant, which exhibits dramatic leaf folding when touched. This fascinating phenomenon highlights the significance of the pulvinus in plant behavior and survival. Understanding the function of the pulvinus can provide insights into the broader mechanisms of plant adaptation and evolution. For instance, researchers have explored how variations in the size and elasticity of the pulvinus can affect a plant’s ability to thrive in different environments. In arid regions, plants with more robust pulvinus structures may be better equipped to conserve water by minimizing leaf surface area during the hottest parts of the day. Conversely, in more humid environments, a flexible pulvinus might allow for greater exposure to sunlight, enhancing photosynthetic efficiency.Moreover, the study of the pulvinus extends beyond botany; it intersects with fields such as biomechanics and robotics. By mimicking the movement mechanisms of the pulvinus, scientists are developing bio-inspired technologies that could lead to advances in soft robotics and adaptive structures. These innovations could have applications ranging from flexible solar panels to responsive architectural designs that adjust to environmental changes.In conclusion, the pulvinus is more than just a simple botanical term; it encapsulates a complex interplay of form and function that is vital for plant life. Its role in movement, support, and adaptation illustrates the intricate ways in which plants interact with their environment. As research continues to uncover the secrets of the pulvinus, we gain a deeper appreciation for the remarkable strategies that plants employ to survive and thrive in an ever-changing world.

术语pulvinus指的是某些植物叶柄基部的肿胀、垫状结构。这个独特的解剖特征在叶子和花朵的运动和定向中起着至关重要的作用，使它们能够对光和重力等环境刺激作出反应。pulvinus在豆科植物中尤为受到研究，它促进了快速的叶子运动，称为夜间运动（nyctinasty），这种运动在黑暗来临时发生。这种适应不仅有助于在白天优化光合作用，还通过在夜间折叠叶子来保护植物免受食草动物的侵害。除了在运动中的作用，pulvinus还具有结构性目的。它为叶子或花朵提供支撑，使其能够保持最佳的阳光捕获角度。可以在多种物种中观察到这一结构，包括被称为含羞草的Mimosa pudica，它在触碰时表现出戏剧性的叶子折叠现象。这一迷人的现象突显了pulvinus在植物行为和生存中的重要性。理解pulvinus的功能可以提供对植物适应和进化更广泛机制的洞察。例如，研究人员探讨了pulvinus的大小和弹性的变化如何影响植物在不同环境中的生存能力。在干旱地区，具有更强壮的pulvinus结构的植物可能更能有效地节约水分，通过在一天中最热的部分减少叶子的表面积。相反，在湿润环境中，灵活的pulvinus可能允许更大程度地暴露在阳光下，从而增强光合作用效率。此外，pulvinus的研究超越了植物学；它与生物力学和机器人技术等领域交叉。通过模仿pulvinus的运动机制，科学家们正在开发仿生技术，这可能导致软机器人和自适应结构的进步。这些创新可能在从柔性太阳能电池板到响应环境变化的建筑设计等应用中发挥作用。总之，pulvinus不仅仅是一个简单的植物学术语；它囊括了形式与功能之间复杂的相互作用，这对于植物生命至关重要。它在运动、支撑和适应中的作用说明了植物与环境相互作用的微妙方式。随着研究继续揭开pulvinus的秘密，我们对植物为在不断变化的世界中生存和繁荣而采取的非凡策略有了更深的欣赏。