abscission layer

简明释义

离层;

英英释义

例句

1.During fruit ripening, the abscission layer 脱落层 helps separate the fruit from the stem.

在水果成熟期间，脱落层有助于将水果与果梗分离。

2.Researchers study the abscission layer 脱落层 to understand how plants regulate their growth and development.

研究人员研究脱落层以了解植物如何调节其生长和发育。

3.The formation of the abscission layer 脱落层 in plants signals the beginning of leaf drop in autumn.

植物中脱落层的形成标志着秋季落叶的开始。

4.In some species, the abscission layer 脱落层 can be influenced by environmental factors such as temperature and humidity.

在某些物种中，脱落层可以受到温度和湿度等环境因素的影响。

5.The abscission layer 脱落层 is crucial for the process of leaf senescence and eventual shedding.

脱落层对于叶片衰老和最终脱落的过程至关重要。

作文

The process of plant growth and development is a fascinating subject that encompasses various biological phenomena. One crucial aspect of this process is the formation of the abscission layer (脱落层), which plays a significant role in how plants manage their leaves, fruits, and flowers. The abscission layer is a specialized layer of cells that forms at the base of a leaf or fruit stem, facilitating the separation of these structures from the plant when they are no longer needed. This phenomenon is not only essential for the health of the plant but also has implications for its reproductive success and overall lifecycle.During the growing season, plants are busy photosynthesizing, producing energy, and supporting new growth. However, as the seasons change, particularly in temperate climates, environmental conditions can become less favorable. In response to these changes, plants must adapt by shedding parts of themselves that are no longer beneficial. This is where the abscission layer comes into play. The formation of the abscission layer is triggered by various factors, including hormonal changes within the plant. As daylight decreases and temperatures drop in autumn, the production of auxins, a type of plant hormone, decreases. This reduction signals the cells in the area where the abscission layer will form to start breaking down. Enzymes are activated, leading to the dissolution of cell walls and ultimately causing the leaf or fruit to detach from the plant.This process is not merely a random shedding of plant parts; it is a carefully regulated mechanism that allows the plant to conserve resources. By losing leaves during the fall, for instance, deciduous trees reduce water loss and prevent damage from snow accumulation. Similarly, when fruits mature and are ready to be dispersed, the formation of the abscission layer ensures that they can fall to the ground, where they may germinate and grow into new plants.The study of the abscission layer extends beyond botany and into agricultural practices. Farmers and horticulturists often manipulate the conditions surrounding plants to control when and how they shed their leaves or fruits. For example, understanding the mechanisms behind the abscission layer can help in determining the optimal harvesting time for crops, ensuring maximum yield and quality. This knowledge can lead to better management practices that enhance food production and sustainability.In conclusion, the abscission layer (脱落层) is a remarkable adaptation that showcases the intricate relationship between plants and their environment. It highlights how plants have evolved complex systems to thrive and survive in changing conditions. As we continue to explore the wonders of plant biology, the significance of the abscission layer becomes increasingly clear, revealing the delicate balance of life that exists in the natural world. Understanding these processes not only enriches our knowledge of botany but also informs practical applications in agriculture and conservation efforts.