stipule

简明释义

英[ˈstɪpjuːl]美[ˈstɪpjʊl]

n. [植] 托叶

英英释义

单词用法

同义词

反义词

例句

1.Complete leaf composed of petiole, blade and stipule.

完全叶由叶柄、叶片和托叶组成。

2.Stipule A modified leaf found as an outgrowth from the petiole or leaf base.

由叶柄或叶基部生长出的变态的叶，为发育产生的外部结构。

3.Stipule A modified leaf found as an outgrowth from the petiole or leaf base.

由叶柄或叶基部生长出的变态的叶，为发育产生的外部结构。

4.During our botany field trip, we learned how to identify stipules on various trees.

在我们的植物学实地考察中，我们学习了如何识别各种树木上的托叶。

5.The leaf of the plant features a pair of stipules, which are small leaf-like structures at the base.

这株植物的叶子有一对托叶，它们是位于基部的小叶状结构。

6.Botanists often examine stipules to identify different species of plants.

植物学家常常检查托叶以识别不同种类的植物。

7.In some plants, the stipules can be modified into spines for protection.

在某些植物中，托叶可以变形为刺以提供保护。

8.The presence of stipules is a key characteristic in the classification of certain legumes.

在某些豆科植物的分类中，托叶的存在是一个关键特征。

作文

In the world of botany, every detail matters, and one often overlooked feature of plants is the stipule. A stipule is a small, leaf-like structure that is found at the base of a leaf stalk (petiole) in some plants. These structures can vary significantly in shape, size, and function, making them an interesting subject of study for botanists and plant enthusiasts alike. Understanding the role of stipules can provide insights into the evolutionary adaptations of various plant species. The presence of stipules can be seen in many different families of plants, including legumes, roses, and willows. In some cases, stipules are modified into spines or tendrils, which serve protective or climbing functions respectively. This adaptability showcases the diverse strategies plants have developed to survive in their environments. For example, in thorny plants like certain species of acacia, the stipules can evolve into sharp spines that deter herbivores from feeding on the leaves. Moreover, stipules can also play a crucial role in photosynthesis. In some plants, these structures may be green and capable of photosynthetic activity, thereby contributing to the plant's overall energy production. This is particularly evident in young plants where the leaves are still developing, and the stipules provide additional surface area for capturing sunlight. The study of stipules extends beyond their physical characteristics; it also encompasses their ecological significance. By examining the variations of stipules across different species, researchers can infer the environmental pressures that have shaped their evolution. For instance, in arid regions, plants may develop smaller or fewer stipules to reduce water loss, while in more humid environments, larger and more abundant stipules may aid in maximizing photosynthesis. In conclusion, the stipule may seem like a minor component of plant anatomy, but its implications are far-reaching. From providing protection against herbivores to enhancing photosynthetic efficiency, stipules demonstrate the intricate relationships between plant structures and their environments. As we continue to explore the fascinating world of botany, appreciating the role of stipules can deepen our understanding of plant biology and evolution. Whether you are a seasoned botanist or a curious observer, taking the time to notice these small yet significant features can enrich your experience in nature. Understanding stipules and their functions not only adds to our knowledge of plant anatomy but also encourages us to appreciate the complexity of life forms around us. The next time you are out in the garden or a natural setting, take a moment to examine the leaves of the plants you encounter. Look closely at the base of the petioles; you might just find a pair of stipules quietly doing their part in the grand tapestry of life. In essence, the study of stipules is a reminder that even the smallest details in nature can have significant roles, and this perspective can inspire us to observe and learn from the world around us more deeply.

在植物学的世界中，每一个细节都至关重要，而植物中一个常被忽视的特征就是托叶。托叶是一些植物在叶柄（叶柄）的基部发现的小型叶状结构。这些结构在形状、大小和功能上可能有显著差异，使其成为植物学家和植物爱好者研究的有趣主题。理解托叶的作用可以为我们提供关于各种植物物种进化适应的见解。 托叶的存在可以在许多不同的植物科中看到，包括豆科、玫瑰科和柳科。在某些情况下，托叶被改造成刺或卷须，这分别具有保护或攀爬的功能。这种适应性展示了植物为生存而发展出的多样化策略。例如，在某些种类的金合欢等带刺植物中，托叶可以演变成尖锐的刺，以阻止食草动物啃食叶子。 此外，托叶还可能在光合作用中发挥关键作用。在某些植物中，这些结构可能是绿色的，并能够进行光合作用，从而为植物的整体能量生产做出贡献。这在幼苗中尤为明显，因为叶子仍在发育，而托叶提供了额外的表面积来捕获阳光。 对托叶的研究不仅限于它们的物理特征；它还包括它们的生态重要性。通过检查不同物种间托叶的变异，研究人员可以推断出塑造其进化的环境压力。例如，在干旱地区，植物可能会发展出更小或更少的托叶以减少水分流失，而在更潮湿的环境中，更大和更多的托叶可能有助于最大化光合作用。 总之，托叶可能看似植物解剖学中的一个微小组成部分，但其影响却是深远的。从提供对抗食草动物的保护到增强光合作用效率，托叶展示了植物结构与其环境之间复杂的关系。随着我们继续探索迷人的植物学世界，欣赏托叶的作用可以加深我们对植物生物学和进化的理解。无论你是经验丰富的植物学家还是好奇的观察者，花时间注意这些小而重要的特征都能丰富你在自然中的体验。 理解托叶及其功能不仅增加了我们对植物解剖学的了解，还鼓励我们更深入地欣赏周围生命形式的复杂性。下次当你在花园或自然环境中时，花一点时间观察你遇到的植物的叶子。仔细查看叶柄的基部；你可能会发现一对托叶在安静地为生命的宏伟图景尽职尽责。 本质上，托叶的研究提醒我们，即使是自然界中最微小的细节也可能具有重要的作用，而这种视角可以激励我们更加深刻地观察和学习周围的世界。