protoxylem

简明释义

英[ˌprəʊtəˈzaɪləm]美[ˌproʊtəˈzaɪləm]

n. [植] 原生木质部

英英释义

单词用法

同义词

反义词

例句

1.The degree of lignification varies from slight in protoxylem to heavy in sclerenchyma and some xylem vessels, but values of 25-30% lignin and 50% cellulose are average.

不同部位的木质化的程度不同，原生木质部中只有轻微的加厚，而在厚壁组织和一些木质部导管中则进一步加厚，平均含25%-30%的木质素和50%的纤维素。

2.Protoxylem the PRIMARY xylem elements that are formed from the procambium first.

初生木质部的成分，最早由原形成层形成。

3.It is found in protoxylem and first metaxylem tracheids and vessels.

可在原生木质部和初始后生木质部的管胞和导管中见到。

4.Annular thickening rings of thickening laid down on the inner wall of protoxylem vessels and tracheids.

环状加厚：原生木质部导管和管胞的内层环状増厚。

5.The degree of lignification varies from slight in protoxylem to heavy in sclerenchyma and some xylem vessels, but values of 25-30% lignin and 50% cellulose are average.

不同部位的木质化的程度不同，原生木质部中只有轻微的加厚，而在厚壁组织和一些木质部导管中则进一步加厚，平均含25%-30%的木质素和50%的纤维素。

6.The structure of protoxylem 原木质部 is adapted to withstand the pressure of water movement.

原木质部的结构适应于承受水流动的压力。

7.The development of protoxylem 原木质部 is crucial for the early growth of vascular plants.

原木质部的发育对维管植物的早期生长至关重要。

8.In monocots, protoxylem 原木质部 often forms in a ring pattern.

在单子叶植物中，原木质部通常以环状模式形成。

9.Researchers studied the differentiation of protoxylem 原木质部 in various plant species.

研究人员研究了不同植物物种中原木质部的分化。

10.In young seedlings, the presence of protoxylem 原木质部 allows for efficient water transport.

在幼苗中，原木质部的存在可以有效地运输水分。

作文

In the study of plant biology, understanding the various components that contribute to a plant's structure and function is essential. One such component is the protoxylem, which plays a crucial role in the development of vascular plants. The protoxylem is the first formed xylem tissue that appears during the growth of a plant. It is primarily responsible for the conduction of water and minerals from the roots to the rest of the plant. This early xylem tissue is particularly important during the initial stages of a plant's life, as it helps establish the plant's vascular system.The structure of protoxylem is unique compared to later formed xylem tissues. It consists of tracheary elements that are smaller in diameter and have thinner walls than those found in mature xylem. This allows the protoxylem to efficiently transport water and nutrients while also providing some mechanical support to the young plant. As the plant matures, the protoxylem eventually becomes functional and is replaced by metaxylem, which has larger cells and thicker walls, allowing for increased water transport capacity.The formation of protoxylem occurs during the differentiation of vascular tissues in the plant. It is initiated in the meristematic regions where cells divide and differentiate into specialized cell types. The presence of protoxylem is vital for the plant's ability to grow upward and compete for sunlight, as it facilitates the movement of water and nutrients necessary for photosynthesis and other metabolic processes.Moreover, the study of protoxylem extends beyond just its structural and functional aspects. Researchers also investigate how environmental factors influence its development. For instance, water availability and soil conditions can significantly impact the formation and efficiency of protoxylem. In drought conditions, plants may adapt by modifying their xylem structure to improve water retention and transport, demonstrating the dynamic relationship between plants and their environment.In summary, the protoxylem is a fundamental component of plant vascular systems, essential for the early stages of growth and development. Its unique structure and function allow for effective water and nutrient transport, supporting the plant's overall health and vitality. Understanding the role of protoxylem not only enhances our knowledge of plant biology but also provides insights into how plants adapt to their environments, which is increasingly important in the context of climate change and habitat alteration. As we continue to explore the complexities of plant life, the significance of protoxylem will undoubtedly remain a key area of research, contributing to our understanding of botany and ecology.

在植物生物学的研究中，理解构成植物结构和功能的各个组成部分至关重要。其中一个组成部分是原木质部，它在维管植物的发育中发挥着关键作用。原木质部是植物生长过程中形成的第一种木质组织，主要负责将水分和矿物质从根部输送到植物的其他部分。这种早期的木质组织在植物生命的初始阶段尤为重要，因为它有助于建立植物的维管系统。与后期形成的木质组织相比，原木质部的结构独特。它由直径较小、壁较薄的导管元素组成，这些元素比成熟木质中的导管元素要小得多。这使得原木质部能够有效地运输水分和营养，同时也为幼苗提供了一定的机械支持。随着植物的成熟，原木质部最终变得功能性，并被中木质部取代，后者具有更大的细胞和更厚的壁，从而提高了水分运输能力。原木质部的形成发生在植物维管组织的分化过程中。在分生组织区域，细胞分裂并分化为专业细胞类型，从而启动原木质部的形成。原木质部的存在对植物向上生长和争夺阳光的能力至关重要，因为它促进了水分和营养的移动，这对于光合作用和其他代谢过程是必需的。此外，原木质部的研究不仅限于其结构和功能方面。研究人员还调查环境因素如何影响其发育。例如，水分的可用性和土壤条件可以显著影响原木质部的形成和效率。在干旱条件下，植物可能会通过修改其木质结构来改善水分保持和运输，从而展示植物与环境之间的动态关系。总之，原木质部是植物维管系统的基本组成部分，对于植物的早期生长和发育至关重要。其独特的结构和功能使其能够有效地运输水分和营养，支持植物的整体健康和活力。理解原木质部的作用不仅增强了我们对植物生物学的认识，还提供了植物如何适应其环境的见解，这在气候变化和栖息地改变的背景下愈发重要。随着我们继续探索植物生活的复杂性，原木质部的重要性无疑将继续成为研究的关键领域，为我们对植物学和生态学的理解做出贡献。