apoplast

简明释义

英[ˈæpəˌplæst]美[æpəpˈlæst]

n. 质外体，离质体；非原质体

英英释义

单词用法

同义词

反义词

例句

1.The nutrient transported from dorsal vascular bundles first unloaded into apoplast via nucellar projection, then was absorbed by aleurone layer cells;

由背部维管束运来的养分经珠心突起先卸至质外体，其后再由糊粉层细胞吸收；

2.The apoplast is of essential significance in cell communication and identification; the apoplast signal molecules, too, plays an important role in the growth and development of plant cells.

质外体在细胞间的通讯及识别上有重要意义，质外体信号分子对植物细胞的生长发育也起着非常重要的作用。

3.The apoplast is of essential significance in cell communication and identification; the apoplast signal molecules, too, plays an important role in the growth and development of plant cells.

质外体在细胞间的通讯及识别上有重要意义，质外体信号分子对植物细胞的生长发育也起着非常重要的作用。

4.In many plants, nutrients are absorbed through the apoplast before entering the symplast.

在许多植物中，营养物质是在进入共质体之前通过胞外体被吸收的。

5.The movement of water through the plant occurs via the apoplast, which is the pathway outside the plasma membranes.

水通过植物的移动是通过胞外体进行的，这是一种位于细胞膜外的通道。

6.The apoplast plays a crucial role in the transport of minerals from the soil to the roots.

胞外体在矿物质从土壤运输到根部中起着至关重要的作用。

7.Researchers studied the apoplast to understand how pathogens invade plant tissues.

研究人员研究了胞外体以了解病原体如何侵入植物组织。

8.The apoplast provides a route for the passive movement of water and solutes.

胞外体为水和溶质的被动运动提供了一条途径。

作文

In the study of plant biology, one term that frequently arises is apoplast, which refers to the network of cell walls and intercellular spaces within a plant. This structure plays a crucial role in the transport of water and solutes, allowing for efficient movement throughout the plant. Understanding the apoplast is essential for comprehending how plants function and respond to their environment. The apoplast serves as a pathway for the passive movement of substances. Unlike the symplast pathway, which involves the movement of materials through the cytoplasm of cells connected by plasmodesmata, the apoplast allows for substances to move freely through the cell walls without crossing any membranes. This characteristic makes it particularly important for the uptake of water and nutrients from the soil. One of the significant advantages of the apoplast pathway is its efficiency. Water can quickly move from the soil into the roots and up through the plant without the need for energy expenditure. This passive transport mechanism is vital for maintaining the plant's water balance, especially in arid environments where water conservation is critical. Furthermore, the apoplast facilitates the movement of hormones and signaling molecules, which are essential for coordinating growth and responses to environmental stimuli. However, while the apoplast offers numerous benefits, it also presents challenges. For instance, pathogens such as fungi and bacteria can exploit this pathway to invade plant tissues. Once inside the apoplast, these pathogens can spread rapidly, leading to disease and potentially devastating effects on crops. Therefore, plants have evolved various defense mechanisms to protect themselves from such threats, including the production of antimicrobial compounds and the reinforcement of cell walls. Research into the apoplast has revealed much about the intricate relationships between plants and their environment. Scientists have discovered that the composition of the apoplast can be influenced by factors such as soil type, moisture levels, and the presence of other organisms. For example, certain beneficial microorganisms can enhance the functionality of the apoplast, improving nutrient availability and plant health. In conclusion, the apoplast is a fundamental component of plant physiology, playing a vital role in the transport of water, nutrients, and signaling molecules. Its structure and function highlight the complexity of plant systems and their interactions with the surrounding environment. As we continue to explore the world of plant biology, understanding the apoplast will remain essential for advancing agricultural practices and improving crop resilience against environmental stressors. The ongoing research in this area promises to yield valuable insights that can help us develop more sustainable and productive farming methods, ultimately benefiting both the environment and human society.

质外体是植物生物学研究中经常出现的一个术语，指的是植物细胞壁和细胞间隙的网络。这个结构在水分和溶质的运输中起着至关重要的作用，使物质能够高效地在植物内移动。理解质外体对于理解植物如何运作以及如何对环境作出反应至关重要。质外体作为物质被动移动的通道。与通过细胞质的共质途径不同，后者涉及通过连接细胞的质膜小管移动材料，质外体允许物质在不穿越任何膜的情况下自由地通过细胞壁移动。这一特性使其在从土壤吸收水分和养分方面尤为重要。质外体通道的一个显著优势是其效率。水可以快速地从土壤进入根部，并通过植物上升，而无需消耗能量。这种被动运输机制对于维持植物的水分平衡至关重要，特别是在干旱环境中，水分保护显得尤为关键。此外，质外体还促进激素和信号分子的移动，这些分子对于协调生长和响应环境刺激是必不可少的。然而，虽然质外体带来了许多好处，但也存在挑战。例如，真菌和细菌等病原体可以利用这一通道入侵植物组织。一旦进入质外体，这些病原体可以迅速传播，导致疾病并可能对作物造成毁灭性影响。因此，植物已经进化出多种防御机制来保护自己免受此类威胁，包括产生抗微生物化合物和强化细胞壁。对质外体的研究揭示了植物与环境之间复杂的关系。科学家发现，质外体的组成可以受到土壤类型、湿度水平和其他生物存在等因素的影响。例如，某些有益微生物可以增强质外体的功能，提高养分的可用性和植物健康。总之，质外体是植物生理学的基本组成部分，在水分、养分和信号分子的运输中发挥着重要作用。其结构和功能突显了植物系统的复杂性及其与周围环境的相互作用。随着我们继续探索植物生物学的世界，理解质外体将始终是推动农业实践和提高作物对环境压力抵御能力的重要基础。该领域的持续研究有望带来宝贵的见解，帮助我们开发更可持续和高效的农业方法，最终惠及环境和人类社会。