tracheid

简明释义

英[ˈtreɪkɪɪd]美[ˈtreɪkiɪd]

n. [植] 管胞

英英释义

单词用法

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例句

1.Among the climatic factors which affect the geographic variation of tracheid morphological, moisture and rainfall are the principal factors, secondary is temperature.

影响管胞形态地理变异的气候因子中，水湿条件是主导因素，其次是温度。

2.The results show that the average value of tracheid form can not be affected by the planting density through variance analysis .

结果表明，造林密度对马尾松管胞形态总平均值影响不大，方差分析不显著；

3.There were very small effect of seed source and no definite geographic pattern in tracheid length.

管胞长度的种源区和产地效应很小，无一定的地理变异趋势。

4.The results indicated that the five traits like height, diameter at breast height, volume, wood basic density and tracheid length showed at least significant genetic variation among clones.

结果表明，无性系间树高、胸径、材积、木材基本密度和管胞长度存在显著至极显著差异。

5.No significant difference was also found among tree types with different growth rate for specific gravity and tracheid length.

不同生长速率的样木间该二性状差异很小。

6.Tensile strength is mainly controlled by tracheid length, tracheid strength, microfibril angle and crystalline degree etc.

顺纹抗拉强度主要受管胞长度、管胞强度、纤丝角度、结晶度等因子的控制。

7.There are different types of pit-pair between the axial tracheids. the axial tracheid and the ray parenchyma, the axial tracheid and the ray tracheid.

轴向管胞之间、轴向管胞与射线薄壁细胞之间、轴向管胞与射线管胞之间，均有不同类型的纹孔对。

8.In gymnosperms, water is primarily transported through specialized cells called tracheids.

在裸子植物中，水主要通过称为导管的特化细胞运输。

9.Researchers studied the diameter of tracheids to understand how tree species adapt to drought conditions.

研究人员研究了导管的直径，以了解树种如何适应干旱条件。

10.The structure of tracheids allows them to efficiently conduct water under high tension.

导管的结构使它们能够在高张力下有效地导水。

11.The presence of tracheids in fossilized wood can help paleobotanists determine the age of the specimen.

化石木材中导管的存在可以帮助古植物学家确定标本的年龄。

12.Unlike vessel elements, tracheids are long and narrow, providing structural support as well as water transport.

与导管元件不同，导管又长又窄，既提供结构支持，又进行水分运输。

作文

In the vast tapestry of plant biology, understanding the intricacies of water transport is crucial. One of the key components in this system is the tracheid, a specialized cell type found in the xylem of vascular plants. The tracheid (导管) serves as a conduit for water and minerals, allowing these essential nutrients to travel from the roots to various parts of the plant. This process is vital for maintaining the plant's health and facilitating photosynthesis, which is the process by which plants convert sunlight into energy.The structure of a tracheid is fascinating. These elongated cells have thick walls that are often lignified, meaning they contain lignin, a complex organic polymer that provides rigidity and strength. This structural adaptation allows tracheids to withstand the negative pressure created during water transport, ensuring that the plant can effectively draw up water from the soil. Unlike vessel elements, which are also involved in water transport, tracheids are more primitive and are found in all vascular plants, including ferns and gymnosperms.The function of tracheids goes beyond mere water conduction. They also play a role in supporting the plant structure. The lignified walls of tracheids contribute to the overall mechanical strength of the plant, helping it resist bending and breaking under the weight of leaves or during harsh weather conditions. This dual function of transport and support highlights the evolutionary significance of tracheids in plant development.Furthermore, the arrangement of tracheids within the xylem is strategic. They are typically aligned end-to-end, forming long tubes that facilitate efficient water movement. The pits, which are small openings in the walls of tracheids, allow for lateral water movement between adjacent cells. This interconnected network ensures that even if one tracheid becomes blocked, water can still be transported through alternative pathways.In addition to their structural and functional roles, tracheids are also important in the context of plant evolution. The transition from non-vascular to vascular plants marked a significant milestone in the history of plant life. The development of tracheids allowed plants to grow taller and thrive in a wider range of environments. As plants evolved, the efficiency of water transport improved, enabling them to colonize terrestrial habitats.In conclusion, the tracheid (导管) is a remarkable example of nature's ingenuity. Its unique structure and multifaceted role in water transport and plant support illustrate the complex adaptations that have allowed vascular plants to flourish. By studying tracheids, scientists gain insights into the evolutionary processes that have shaped plant life on Earth. Understanding these cellular structures not only enhances our knowledge of botany but also underscores the intricate connections within ecosystems, where every component plays a vital role in sustaining life.

在植物生物学的广阔画卷中，理解水分运输的复杂性至关重要。这个系统中的一个关键组成部分是tracheid，一种在维管植物的木质部中发现的专门细胞类型。tracheid（导管）作为水和矿物质的通道，允许这些必需的营养物质从根部运输到植物的各个部分。这个过程对维持植物的健康和促进光合作用至关重要，光合作用是植物将阳光转化为能量的过程。tracheid的结构令人着迷。这些细长的细胞具有厚壁，通常是木质化的，这意味着它们含有木质素，这是一种复杂的有机聚合物，提供刚性和强度。这种结构适应性使得tracheids能够承受在水运输过程中产生的负压，确保植物能够有效地从土壤中吸取水分。与也参与水运输的导管元素不同，tracheids更为原始，存在于所有维管植物中，包括蕨类植物和裸子植物。tracheids的功能不仅仅是水的导电。它们在支持植物结构方面也发挥着重要作用。tracheids的木质化壁对植物的整体机械强度有贡献，帮助其抵御叶片的重量或在恶劣天气条件下的弯曲和断裂。这种运输和支持的双重功能突显了tracheids在植物发育中的进化重要性。此外，tracheids在木质部中的排列是战略性的。它们通常端对端排列，形成长管道，便于高效的水分移动。tracheids壁上的小孔，允许相邻细胞之间的侧向水分流动。这种相互连接的网络确保即使一个tracheid被阻塞，水仍然可以通过替代路径运输。除了结构和功能作用外，tracheids在植物进化的背景下也很重要。从非维管到维管植物的过渡标志着植物生命历史上的一个重要里程碑。tracheids的发展使植物能够长得更高，并在更广泛的环境中繁荣。随着植物的进化，水分运输的效率提高，使它们能够殖民陆地栖息地。总之，tracheid（导管）是自然巧妙的一个杰出例子。其独特的结构和在水分运输及植物支持中的多重作用，展示了维管植物得以繁荣的复杂适应。通过研究tracheids，科学家们获得了对塑造地球植物生命的进化过程的深入了解。理解这些细胞结构不仅增强了我们对植物学的知识，也强调了生态系统内的复杂联系，在这些系统中，每个组成部分在维持生命中都发挥着至关重要的作用。