petiole

简明释义

英[ˈpetɪˌəʊl]美[ˈpetɪˌoʊl]

n. [植] 叶柄；柄部

英英释义

单词用法

同义词

反义词

例句

1.Petiole (2 -) 4-11 cm, white maculate, densely villous.

叶柄(2-)4 - 11厘米，白色具斑点，密被长柔毛。

2.There are 5~8 vascular bundles arranged in arch shape. Secretory cavities are present in the ground tissue of petiole.

叶柄的基本组织中具有裂生分泌腔，5~8束维管束呈弧形排列或散布在薄壁组织中；

3.The haris originated from the epidermis cells of the stem axis, the petiole, the floral shoot and abaxial surface of the young leaves.

它们起源于叶片远轴面、叶柄的表皮细胞以及苗端茎轴、花柄的表皮细胞。

4.A typical foliage leaf of a plant belonging to the dicotyledons is composed of two principal parts: blade and petiole.

双子叶植物典型的营养叶由两个主要部分组成：叶片和叶柄。

5.Leaves sessile or shortly petiolate, petiole to 5 mm; perianth tube not pubescent inside.

叶无柄或具短叶柄，对5毫米的叶柄；不青春期的花被筒在里面。

6.A sessile leaf has no petiole.

无柄的叶没有叶柄。

7.Scales attaching to the base of petiole are brown, lanceolate.

叶柄基部鳞片棕色，披针形。

8.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。

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

完全叶由叶柄、叶片和托叶组成。

10.The petiole of the leaf connects it to the stem, allowing nutrients to flow from the plant.

叶子的叶柄将其连接到茎上，允许营养物质从植物中流动。

11.In botany class, we learned that the petiole can vary in length and thickness depending on the species.

在植物学课上，我们了解到叶柄的长度和厚度因物种而异。

12.The gardener trimmed the petiole to encourage new growth in the plant.

园丁修剪了叶柄以促进植物的新生长。

13.A healthy petiole is essential for the overall health of the leaf.

健康的叶柄对叶子的整体健康至关重要。

14.When examining the plant, note the color and texture of the petiole as they can indicate its health.

检查植物时，请注意叶柄的颜色和质地，因为它们可以表明植物的健康状况。

作文

In the study of botany, understanding the structure of plants is essential for comprehending their functions and adaptations. One important part of a plant's anatomy is the petiole, which is the stalk that connects the leaf blade to the stem. The petiole plays a crucial role in supporting the leaf and facilitating the transport of water and nutrients between the leaf and the rest of the plant. Without the petiole, leaves would not be able to efficiently capture sunlight for photosynthesis, nor could they effectively exchange gases with the environment. The petiole varies significantly among different plant species, reflecting their unique adaptations to environmental conditions. For instance, in some plants, the petiole is long and slender, allowing leaves to be positioned optimally for sunlight exposure. In contrast, other plants may have shorter or thicker petioles, which can provide additional support and stability in windy conditions. These variations highlight the incredible diversity of plant structures and their relationship with the surrounding ecosystem. Additionally, the petiole can also serve as a storage organ for nutrients. In certain species, the petiole can store carbohydrates and other essential substances, which can be utilized by the plant during periods of stress or dormancy. This ability to adapt and store resources is vital for the survival of many plants, especially those that experience fluctuating environmental conditions. Furthermore, the petiole is often involved in the movement of leaves. Some plants exhibit a phenomenon known as leaf movement, where the petiole allows the leaf to tilt or fold in response to changes in light or temperature. This movement can enhance the plant's ability to capture sunlight and minimize water loss, showcasing the dynamic nature of plant structures. When examining the anatomy of a petiole, it is interesting to note its composition. The petiole consists of vascular tissues, including xylem and phloem, which are essential for transporting water, nutrients, and sugars. The arrangement of these tissues can vary, contributing to the overall strength and flexibility of the petiole. This structural integrity is vital, as the petiole must withstand various forces, such as wind and the weight of the leaf itself. In conclusion, the petiole is a fundamental component of plant anatomy that plays a significant role in a plant's overall health and functionality. By supporting leaves, facilitating nutrient transport, and allowing for adaptive movements, the petiole exemplifies the intricate relationships within plant structures. Understanding the importance of the petiole not only enhances our knowledge of botany but also deepens our appreciation for the complexity of plant life. As we continue to explore the wonders of the natural world, the study of structures like the petiole will remain essential in uncovering the mysteries of how plants thrive in diverse environments.

在植物学的研究中，理解植物的结构对于理解其功能和适应性至关重要。植物解剖学中一个重要的部分是petiole，即连接叶片与茎的柄。petiole在支撑叶子和促进水分及养分在叶子与植物其他部分之间的运输方面起着关键作用。如果没有petiole，叶子将无法有效捕获阳光进行光合作用，也无法有效与环境交换气体。 petiole在不同植物物种之间有显著差异，反映出它们对环境条件的独特适应。例如，在某些植物中，petiole细长而纤细，使叶子能够最佳地定位以获取阳光。相比之下，其他植物可能有更短或更厚的petiole，这可以在风大条件下提供额外的支撑和稳定性。这些变化突显了植物结构的惊人多样性及其与周围生态系统的关系。 此外，petiole还可以作为营养的储存器官。在某些物种中，petiole可以储存碳水化合物和其他必需物质，这些物质可以在植物经历压力或休眠期间被利用。这种适应和储存资源的能力对许多植物的生存至关重要，特别是那些经历波动环境条件的植物。 此外，petiole通常还参与叶子的运动。一些植物表现出一种称为叶子运动的现象，petiole使叶子能够根据光照或温度的变化倾斜或折叠。这种运动可以增强植物捕获阳光的能力并最小化水分损失，展示了植物结构的动态特性。 在检查petiole的解剖结构时，值得注意的是其组成。petiole由包括木质部和韧皮部的维管组织组成，这些组织对于运输水分、养分和糖分至关重要。这些组织的排列可能有所不同，从而影响petiole的整体强度和灵活性。这种结构完整性至关重要，因为petiole必须承受各种力量，如风和叶子自身的重量。 总之，petiole是植物解剖学中的一个基本组成部分，对植物的整体健康和功能发挥着重要作用。通过支撑叶子、促进养分运输以及允许适应性运动，petiole展示了植物结构内的复杂关系。理解petiole的重要性不仅增强了我们对植物学的知识，还加深了我们对植物生命复杂性的欣赏。当我们继续探索自然界的奇迹时，对petiole等结构的研究将继续在揭示植物如何在不同环境中繁荣生存的奥秘中发挥重要作用。