sclereid

简明释义

英[ˈsklɪərɪɪd]美[ˈskleərɪɪd]

n. [植]石细胞；[植]硬化细胞（等于 sclereide）

英英释义

单词用法

同义词

反义词

例句

1.The contents of sclereid and activities of some enzymes, such as POD, PPO and PAL are decreased under the applications of H3BO3, and the effect of the application at young fruit stage is the best.

不同时期叶面喷施硼酸降低了梨果石细胞含量，果实过氧化物酶、多酚氧化酶和苯丙氨酸解氨酶活性也低于对照，且幼果期处理效果最佳。

2.The contents of sclereid and activities of some enzymes, such as POD, PPO and PAL are decreased under the applications of H3BO3, and the effect of the application at young fruit stage is the best.

不同时期叶面喷施硼酸降低了梨果石细胞含量，果实过氧化物酶、多酚氧化酶和苯丙氨酸解氨酶活性也低于对照，且幼果期处理效果最佳。

3.The results were as follows: Persimmon fruit consists of epidermis, sclereid layer and pulp tissues from outside to inside in the fruit transverse section.

结果表明：果实横切面从外到内是表皮层、石细胞层、中果皮及内果皮组成的果肉组织。

4.Sclerenchyma is often found associated with vascular tissue and exists as two distinct types of cell: the long FIBER and the shorter SCLEREID.

厚壁组织由两种形式截然不同的细胞组成：较长的纤维和较短的石细胞。

5.Sclereid Any SCLERENCHYMA cell except the long fibers.

为厚壁组织中除纤维外的所有细胞种类。

6.The hard texture of a pear is due to the presence of many sclereids.

梨的坚硬质地是由于含有许多石细胞。

7.In botany, sclereids are known for providing structural support to various plant tissues.

在植物学中，石细胞以提供各种植物组织的结构支持而闻名。

8.The gritty feel when biting into a ripe pomegranate is caused by sclereids in its seeds.

咬一口成熟的石榴时的沙粒感是由其种子中的石细胞引起的。

9.Some nuts have a high concentration of sclereids, making them harder to chew.

一些坚果含有高浓度的石细胞，使它们更难咀嚼。

10.The study of sclereids can help us understand how plants adapt to their environments.

对石细胞的研究可以帮助我们理解植物如何适应环境。

作文

The world of botany is filled with fascinating structures and functions that contribute to the survival and adaptation of plants. One such structure is the sclereid, which plays a critical role in the overall architecture of certain plant tissues. Sclereids are a type of sclerenchyma cell, characterized by their thick, lignified walls that provide rigidity and strength to various parts of the plant. These cells can be found in many different forms, often contributing to the hardness of seeds and the gritty texture of some fruits. For instance, the pear's gritty texture is primarily due to the presence of sclereids, which serve as a protective mechanism for the seed. Understanding the function of sclereids goes beyond merely recognizing their physical characteristics; it involves appreciating their ecological significance. The tough nature of sclereids helps deter herbivores from consuming the plant's seeds, thus increasing the chances of successful reproduction. Additionally, these cells can contribute to the overall mechanical support of the plant, allowing it to withstand environmental stresses such as wind and rain. This structural integrity is vital for the survival of many plant species, especially those that thrive in challenging habitats. In the context of plant development, sclereids originate from meristematic tissues, which are responsible for the growth and differentiation of plant cells. As these cells mature, they undergo a process known as lignification, where lignin—a complex organic polymer—accumulates in the cell walls. This process not only strengthens the cells but also makes them more resistant to decay, thereby enhancing the longevity of the plant. It is interesting to note that while sclereids are primarily associated with woody plants, they can also be found in herbaceous species, showcasing their versatility across different plant types. Moreover, sclereids are often categorized into various types based on their shape and arrangement. For example, stone cells are a specific type of sclereid that are typically found in the flesh of fruits like cherries and olives. These cells are often irregularly shaped and densely packed, contributing to the hard texture that can be off-putting to some consumers. On the other hand, brachysclereids are shorter and more varied in shape, often found in the seed coats of various plants. Each type of sclereid serves a unique purpose, further highlighting the diversity of this specialized cell type. In conclusion, sclereids are much more than just structural components of plants; they are essential for the protection and support of plant species. Their presence can significantly influence the texture and taste of fruits, as well as the overall health of the plant. Understanding the role of sclereids enriches our knowledge of plant biology and underscores the intricate relationships between plant structures and their functions. As we continue to explore the complexities of botanical science, the study of sclereids remains a vital area of research, offering insights into the evolutionary adaptations that have allowed plants to thrive in diverse environments.

植物学的世界充满了迷人的结构和功能，这些结构和功能有助于植物的生存和适应。其中一种结构是sclereid，它在某些植物组织的整体结构中发挥着关键作用。Sclereids是一种厚壁细胞，具有厚重的木质化细胞壁，为植物的各个部分提供刚性和强度。这些细胞可以以多种不同形式存在，通常有助于种子的硬度和某些水果的沙砾口感。例如，梨的沙砾口感主要是由于sclereids的存在，它们作为种子的保护机制。 理解sclereids的功能不仅仅是识别它们的物理特征；还涉及欣赏它们的生态重要性。Sclereids的坚硬特性有助于阻止食草动物食用植物的种子，从而增加成功繁殖的机会。此外，这些细胞也可以为植物提供整体机械支持，使其能够承受风雨等环境压力。这种结构完整性对许多植物物种的生存至关重要，尤其是那些在挑战性栖息地中茁壮成长的植物。 在植物发育的背景下，sclereids起源于分生组织，这些组织负责植物细胞的生长和分化。当这些细胞成熟时，它们经历一个称为木质化的过程，在此过程中，木质素——一种复杂的有机聚合物——在细胞壁中积累。这个过程不仅增强了细胞的强度，还使它们更耐腐烂，从而提高了植物的寿命。有趣的是，虽然sclereids主要与木本植物相关，但它们也可以在草本植物中找到，展示了它们在不同植物类型中的多样性。 此外，sclereids通常根据其形状和排列方式被分类为各种类型。例如，石细胞是一种特定类型的sclereid，通常在樱桃和橄榄等水果的果肉中发现。这些细胞通常形状不规则且密集排列，有助于形成可能让一些消费者感到不快的硬质口感。另一方面，短细胞则较短且形状多样，通常存在于各种植物的种皮中。每种类型的sclereid都具有独特的用途，进一步突显了这种专门细胞类型的多样性。 总之，sclereids不仅仅是植物的结构成分；它们对植物物种的保护和支持至关重要。它们的存在可以显著影响水果的口感和味道，以及植物的整体健康。理解sclereids的作用丰富了我们对植物生物学的知识，并强调了植物结构与其功能之间的复杂关系。随着我们继续探索植物科学的复杂性，研究sclereids仍然是一个重要的研究领域，提供了关于植物在多样环境中生存的进化适应的见解。