plasmodesmata

简明释义

英[plæzməʊˈdɛstə]美[plæzməˈdɛstə]

n. 胞间连丝（plasmodesma 的复数形式）

英英释义

单词用法

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例句

1.The dynamic nature of plasmodesmata is also reflected by their changing frequencies, which, in turn, depend on the developmental and physiological status of the tissue or the entire plant.

胞间连丝的动态性质还表现在它们的频率是处于变化之中的，这是由组织或植物整体的发育和生理状态决定的。

2.The protoplasts of attached cells are connected and integrated by plasmodesmata.

接触的细胞的原生质体通过原生质连丝连接成一体。

3.The viral movement proteins (MPs) have been reported to increase the plasmodesmata permeability and mediate the transport of viral nucleoproteins between plant cells.

植物病毒运动蛋白可以通过增加胞间连丝的通透性，介导自身和病毒核酸物质的转移。

4.The dynamic nature of plasmodesmata is also reflected by their changing frequencies, which, in turn, depend on the developmental and physiological status of the tissue or the entire plant.

胞间连丝的动态性质还表现在它们的频率是处于变化之中的，这是由组织或植物整体的发育和生理状态决定的。

5.The development of plasmodesmata is crucial for the overall health of a plant.

质外连丝的发展对植物的整体健康至关重要。

6.In some cases, viruses can move from cell to cell via plasmodesmata.

在某些情况下，病毒可以通过质外连丝从一个细胞传播到另一个细胞。

7.Researchers are studying how plasmodesmata facilitate communication in plant tissues.

研究人员正在研究质外连丝如何促进植物组织中的交流。

8.The transport of nutrients between plant cells occurs through structures called plasmodesmata.

植物细胞之间的营养运输通过称为质外连丝的结构进行。

9.Scientists have discovered that the size of plasmodesmata can change in response to environmental stress.

科学家发现，质外连丝的大小可以根据环境压力而变化。

作文

In the intricate world of plant biology, one of the most fascinating structures is the plasmodesmata. These microscopic channels serve as vital connections between plant cells, allowing for the transport of water, nutrients, and signaling molecules. The term plasmodesmata refers to these tiny, tube-like structures that penetrate the cell walls, forming a bridge between adjacent cells. This unique feature is essential for maintaining the health and functionality of plant tissues. Understanding the role of plasmodesmata is crucial for several reasons. Firstly, they facilitate communication between cells. In plants, cells do not operate in isolation; they are part of a complex network where cooperation is key. Through plasmodesmata, cells can share information about environmental conditions, stress factors, and developmental cues. For instance, when a plant experiences drought, the cells can communicate this information through plasmodesmata, triggering a coordinated response to conserve water. Secondly, plasmodesmata play a significant role in nutrient transport. Unlike animals, plants cannot move to find food; instead, they rely on their ability to produce energy through photosynthesis. However, the products of photosynthesis, such as sugars, need to be distributed throughout the plant. Plasmodesmata allow for the efficient movement of these essential compounds from one cell to another, ensuring that all parts of the plant receive the necessary nutrients to thrive. Moreover, the structure of plasmodesmata is noteworthy. They consist of a narrow channel lined with plasma membrane, connecting the cytoplasm of neighboring cells. This connection is not merely a passive conduit; it is a dynamic structure that can regulate the flow of materials based on the plant's needs. For instance, during certain developmental stages, the number and size of plasmodesmata can change, reflecting the plant's growth and metabolic demands. Research into plasmodesmata has also revealed their role in plant defense mechanisms. When attacked by pathogens, plants can use plasmodesmata to spread signals that activate defense genes across the tissue. This rapid communication can enhance the plant's ability to mount an effective defense against invaders, showcasing the importance of these structures beyond mere connectivity. In conclusion, plasmodesmata are more than just physical connections between plant cells; they are integral to the overall functionality of plant systems. By facilitating communication, nutrient transport, and defense responses, plasmodesmata highlight the complexity and interdependence of plant life. As we continue to explore the fascinating world of plant biology, understanding structures like plasmodesmata will undoubtedly lead to new insights into how plants adapt and thrive in their environments.

在植物生物学的复杂世界中，最引人入胜的结构之一是质外体连丝。这些微小的通道作为植物细胞之间的重要连接，允许水分、养分和信号分子的运输。术语质外体连丝指的是这些微小的管状结构，它们穿透细胞壁，在相邻细胞之间形成桥梁。这一独特特征对于维持植物组织的健康和功能至关重要。理解质外体连丝的作用至关重要，原因有几个。首先，它们促进细胞之间的交流。在植物中，细胞并不是孤立运作的；它们是一个复杂网络的一部分，合作是关键。通过质外体连丝，细胞可以共享有关环境条件、压力因素和发育线索的信息。例如，当植物经历干旱时，细胞可以通过质外体连丝传达这一信息，从而触发协调的反应以节约水分。其次，质外体连丝在养分运输中发挥着重要作用。与动物不同，植物不能移动以寻找食物；相反，它们依靠通过光合作用产生能量的能力。然而，光合作用的产物，如糖类，需要在植物中分配。质外体连丝允许这些必需化合物在细胞之间高效移动，确保植物的所有部分获得必要的养分以繁荣发展。此外，质外体连丝的结构值得注意。它们由一条狭窄的通道组成，通道内衬有质膜，连接相邻细胞的细胞质。这种连接不仅仅是一个被动的通道；它是一个动态结构，可以根据植物的需要调节材料的流动。例如，在某些发育阶段，质外体连丝的数量和大小可能会发生变化，反映植物的生长和代谢需求。对质外体连丝的研究还揭示了它们在植物防御机制中的作用。当受到病原体攻击时，植物可以利用质外体连丝传播激活防御基因的信号。这种快速的交流可以增强植物对入侵者的有效防御能力，展示了这些结构超越单纯连接的意义。总之，质外体连丝不仅仅是植物细胞之间的物理连接；它们是植物系统整体功能的重要组成部分。通过促进沟通、养分运输和防御反应，质外体连丝突显了植物生命的复杂性和相互依赖性。随着我们继续探索植物生物学的迷人世界，理解像质外体连丝这样的结构无疑将为我们提供新的见解，了解植物如何适应和繁荣于其环境中。