plasmodesma

简明释义

英[ˌplæzməˈdezmə]美[ˌplæzməˈdezmə]

n. [细胞] 胞间连丝

英英释义

单词用法

同义词

反义词

例句

1.There was short of plasmodesma between SE and CC, between SE/CC complexes and between SEs and phloem parenchyma cells;

筛分子（SE）与伴胞（CC）间、SE CC复合物之间、筛分子与韧皮薄壁细胞间缺少胞间连丝。

2.There was short of plasmodesma between SE and CC, between SE/CC complexes and between SEs and phloem parenchyma cells;

筛分子（SE）与伴胞（CC）间、SE CC复合物之间、筛分子与韧皮薄壁细胞间缺少胞间连丝。

3.During cell division, the formation of new plasmodesma is essential for maintaining cellular connectivity.

在细胞分裂过程中，新质膜通道的形成对于维持细胞间的连通性至关重要。

4.The structure of plasmodesma includes a narrow cytoplasmic channel that connects two plant cells.

质膜通道的结构包括一个狭窄的细胞质通道，连接两个植物细胞。

5.The study of plasmodesma can provide insights into plant development and disease resistance.

对质膜通道的研究可以为植物发育和抗病能力提供见解。

6.In plant cells, the presence of plasmodesma allows for communication between adjacent cells.

在植物细胞中，质膜通道的存在使得相邻细胞之间能够进行交流。

7.Research has shown that plasmodesma play a crucial role in the transport of nutrients.

研究表明，质膜通道在养分运输中起着至关重要的作用。

作文

In the intricate world of plant biology, the term plasmodesma refers to a vital structure that plays a significant role in cell communication and nutrient transport. These microscopic channels, which connect adjacent plant cells, allow for the movement of water, ions, and various signaling molecules. Understanding the function and significance of plasmodesma is crucial for anyone interested in plant physiology and the broader implications for agriculture and ecology.The plasmodesma is essentially a narrow cytoplasmic channel that traverses the cell walls of plant cells. Unlike animal cells, which are separated by tight junctions and gap junctions, plant cells are interconnected through these channels. This unique feature allows for a direct exchange of materials, ensuring that cells can communicate effectively and respond to environmental changes. For instance, when a plant experiences drought stress, signals can be transmitted through the plasmodesma to trigger physiological responses in neighboring cells, such as closing stomata to reduce water loss.Moreover, the plasmodesma is not just a passive conduit; it actively regulates the flow of substances between cells. The size and permeability of these channels can change depending on the developmental stage of the plant or in response to specific stimuli. This dynamic nature of plasmodesma highlights its importance in maintaining homeostasis within plant tissues.Research has shown that plasmodesma also plays a role in the transport of macromolecules, including proteins and RNA. This capability is particularly important during the development of plant tissues, where coordinated growth and differentiation are necessary. For example, during the formation of leaves and flowers, signaling molecules can pass through plasmodesma to ensure that all cells are synchronized in their development processes.In addition to their biological significance, plasmodesma have implications for agricultural practices. Understanding how these structures function can lead to advancements in crop resilience and productivity. By manipulating the pathways associated with plasmodesma, scientists may be able to enhance the ability of plants to withstand stressors such as pests, diseases, and climate change. For instance, researchers are exploring ways to improve the efficiency of nutrient transport through plasmodesma, which could lead to higher yields and reduced reliance on chemical fertilizers.Furthermore, the study of plasmodesma extends beyond basic plant biology; it intersects with fields such as biotechnology and genetic engineering. By harnessing the knowledge of how plasmodesma facilitate intercellular communication, scientists can develop innovative techniques to modify plant traits. This could pave the way for creating genetically modified crops that are more nutritious, resilient, and environmentally friendly.In conclusion, the plasmodesma is a remarkable component of plant cells that underscores the complexity of plant life. Its role in facilitating communication and transport between cells is indispensable for the health and development of plants. As research continues to unveil the mysteries of plasmodesma, we gain valuable insights that can inform agricultural practices and contribute to sustainable food production. Understanding this structure not only enhances our appreciation of plant biology but also equips us with the tools to address some of the pressing challenges in modern agriculture.

在植物生物学的复杂世界中，术语plasmodesma指的是一种重要结构，在细胞通信和营养运输中发挥着重要作用。这些微观通道连接相邻的植物细胞，允许水、离子和各种信号分子的移动。了解plasmodesma的功能和重要性对于任何对植物生理学以及农业和生态学更广泛影响感兴趣的人来说都是至关重要的。plasmodesma本质上是穿越植物细胞细胞壁的狭窄细胞质通道。与通过紧密连接和间隙连接分开的动物细胞不同，植物细胞通过这些通道相互连接。这一独特特征允许物质的直接交换，确保细胞能够有效沟通并响应环境变化。例如，当植物经历干旱压力时，信号可以通过plasmodesma传递到邻近细胞，以触发生理反应，例如关闭气孔以减少水分流失。此外，plasmodesma不仅仅是一个被动的导管；它主动调节物质在细胞之间的流动。这些通道的大小和通透性可以根据植物的发育阶段或对特定刺激的反应而变化。plasmodesma的这种动态特性突显了其在维持植物组织内稳态中的重要性。研究表明，plasmodesma还在大分子的运输中发挥作用，包括蛋白质和RNA。这种能力在植物组织的发育过程中尤为重要，在那里协调的生长和分化是必要的。例如，在叶子和花朵的形成过程中，信号分子可以通过plasmodesma传递，以确保所有细胞在其发育过程中保持同步。除了它们的生物学意义外，plasmodesma对农业实践也有影响。了解这些结构的功能可以推动作物抗逆性和生产力的进步。通过操纵与plasmodesma相关的通路，科学家们可能能够增强植物抵御病虫害、疾病和气候变化等压力源的能力。例如，研究人员正在探索改善通过plasmodesma运输营养物质效率的方法，这可能导致更高的产量和减少对化肥的依赖。此外，plasmodesma的研究超越了基础植物生物学；它与生物技术和基因工程等领域交叉。通过利用对plasmodesma促进细胞间通信的知识，科学家们可以开发创新技术来修改植物特性。这可能为创造更营养、更具韧性和环保的转基因作物铺平道路。总之，plasmodesma是植物细胞的一个显著组成部分，突显了植物生命的复杂性。它在促进细胞之间的通信和运输中的作用对植物的健康和发育至关重要。随着研究继续揭示plasmodesma的奥秘，我们获得了有价值的见解，可以为农业实践提供信息，并有助于可持续食品生产。理解这一结构不仅增强了我们对植物生物学的欣赏，而且使我们具备了应对现代农业一些紧迫挑战的工具。