abscission

简明释义

英[æbˈsɪʒən]美[æbˈsɪʒən]

n. （枯叶或成熟果实的）脱落；用隔层分离枝、叶、花和树皮

英英释义

单词用法

同义词

反义词

例句

1.Objective: To introduce a way of epicanthus correction by inferior edge abscission.

前言：目的：介绍一种通过内眦下边缘离断矫正内眦赘皮方法。

2.On the other hand, SHK-6 application also increased the abscission number of flower and pod, but did not affect the percentage of the abscission.

虽然SHK - 6处理也增加不同密度水平下的花荚脱落数，但对脱落率没有影响。

3.It is important in the deg radation of plant cell walls in living plants ( e. g . in leaf abscission )

在生活植物体的细胞壁的降解过程中起重要的作用（如叶子脱落） 。

4.So there is important academic significance and application value to carry out research on the abscission of soybean flowers and pods and its regulation mechanism during the early stage of anthesis.

因此，在开花初期研究大豆花荚脱落及其控制机理具有重要的理论意义和实际应用价值。

5.Intestinal mucosa abscission was serious, some of the intestinal gland cells were necrotic, the smooth muscle was hemorrhagic and has granules.

肠黏膜严重脱落，部分肠腺细胞崩解坏死，肠壁平滑肌有严重出血及色素沉着。

6.It is important in the DE gradation of plant ce ll walls in living plants (e. G. in le af abscission).

在生活植物体的细胞壁的降解过程中起重要的作用(如叶子脱落)。

7.When abscission occurred, total sugar and soluble protein were decreased, but reducing sugar was increased.

当脱落发生时，培养体的总糖及可溶性蛋白的含量降低，但还原糖含量升高。

8.Most of boll abscission occurred in the first node and most of square abscission in the second node at the same branch.

同一果枝第一果节以落铃为主，第二果节以落蕾为主。

9.Roof abscission layer monitoring is one of important part of integrated monitoring in the full-anchor support roadway tunneling process.

顶板离层监测是全锚支护巷道掘进过程中综合监测的重要内容。

10.The scientist studied the abscission process to understand how trees adapt to seasonal changes.

科学家研究了abscission过程，以了解树木如何适应季节变化。

11.The process of leaf drop in autumn is known as abscission, which refers to the natural separation of a part from a plant.

秋天落叶的过程被称为abscission，指的是植物部分自然分离的现象。

12.During abscission, cells at the base of the leaf petiole undergo changes that facilitate detachment.

在abscission过程中，叶柄基部的细胞发生变化以促进分离。

13.In horticulture, abscission can be manipulated to improve fruit harvesting efficiency.

在园艺中，可以操控abscission以提高水果采摘的效率。

14.The term abscission is often used in botany to describe the shedding of leaves or fruits.

术语abscission常用于植物学中，描述叶子或果实的脱落。

作文

In the realm of biology, the concept of abscission plays a crucial role in understanding how plants manage their growth and adapt to their environment. Abscission refers to the process by which a plant sheds its leaves, flowers, or fruits. This natural phenomenon occurs for various reasons, including seasonal changes, environmental stress, and the plant's overall health. Understanding abscission not only helps us appreciate the intricate workings of nature but also provides insights into how plants respond to their surroundings.One of the most common examples of abscission can be observed during autumn when deciduous trees lose their leaves. As temperatures drop and daylight hours shorten, trees prepare for winter by entering a state of dormancy. During this time, the production of chlorophyll slows down, and the vibrant green leaves begin to change color. Eventually, the tree initiates the abscission process, where specialized cells at the base of the leaf stem weaken, allowing the leaves to fall off. This shedding is essential for the tree's survival, as it reduces water loss and prevents damage from heavy snow accumulation.Moreover, abscission is not limited to leaves; it also occurs in fruits. For instance, many fruits, such as apples and pears, undergo abscission when they reach maturity. The plant sends signals that trigger the formation of an abscission layer, which is a specialized tissue that separates the fruit from the stem. This process ensures that the fruit falls to the ground when it is ripe, allowing for seed dispersal and the continuation of the species. Understanding the mechanics of abscission in fruit-bearing plants can aid farmers and horticulturists in optimizing harvest times and improving crop yields.In addition to its biological significance, abscission has implications in agriculture and horticulture. Farmers often manipulate abscission processes to enhance crop production. For example, the application of certain hormones can accelerate the shedding of unwanted fruits or leaves, allowing the plant to focus its energy on producing higher-quality yields. This practice highlights the importance of understanding abscission not only from a scientific perspective but also from a practical one.Furthermore, studying abscission can provide insights into how plants cope with environmental stresses. In times of drought or extreme heat, some plants may initiate abscission to conserve water and energy. By shedding unnecessary foliage, these plants can survive harsh conditions and continue to thrive in less-than-ideal environments. This adaptability showcases the resilience of nature and the importance of abscission in the survival of plant species.In conclusion, the process of abscission is a fascinating and vital aspect of plant biology that demonstrates the intricate relationship between plants and their environment. From seasonal leaf drop to fruit maturation, abscission serves multiple purposes that are essential for the health and survival of plants. By studying this process, we gain a deeper appreciation for the complexities of nature and the ways in which organisms adapt to their surroundings. Ultimately, understanding abscission not only enriches our knowledge of biology but also informs agricultural practices that can lead to more sustainable food production.

在生物学的领域中，abscission（离层）这一概念在理解植物如何管理其生长和适应环境方面发挥着至关重要的作用。Abscission指的是植物脱落叶子、花朵或果实的过程。这种自然现象发生的原因有很多，包括季节变化、环境压力和植物的整体健康。理解abscission不仅帮助我们欣赏自然的复杂运作，还提供了植物如何应对周围环境的洞察。最常见的abscission例子可以在秋天观察到，当落叶树木失去它们的叶子时。随着气温下降和日照时间缩短，树木通过进入休眠状态为冬季做准备。在此期间，叶绿素的产生减缓，鲜绿色的叶子开始变色。最终，树木启动abscission过程，叶柄基部的特化细胞变弱，使叶子掉落。这种脱落对树木的生存至关重要，因为它减少了水分流失，并防止重雪积累造成的损害。此外，abscission不仅限于叶子；它也发生在果实上。例如，许多果实，如苹果和梨，在成熟时经历abscission。植物发出信号，触发离层的形成，这是一种特化组织，分离果实与茎。这一过程确保果实在成熟时掉落到地面，允许种子传播和物种的延续。理解果实植物中abscission的机制可以帮助农民和园艺师优化收获时间，提高作物产量。除了生物学意义外，abscission在农业和园艺中也有影响。农民经常操控abscission过程以增强作物生产。例如，施用某些激素可以加速不需要的果实或叶子的脱落，使植物能够将精力集中在产生更高质量的产量上。这一做法突显了从科学和实际角度理解abscission的重要性。此外，研究abscission可以提供植物如何应对环境压力的见解。在干旱或极端高温时期，一些植物可能会启动abscission以节省水分和能量。通过脱落不必要的叶片，这些植物可以在恶劣条件下生存并继续在不理想的环境中繁荣。这种适应性展示了自然的韧性以及abscission在植物物种生存中的重要性。总之，abscission过程是植物生物学中一个迷人且至关重要的方面，展示了植物与其环境之间复杂的关系。从季节性落叶到果实成熟，abscission服务于多种目的，这些目的对植物的健康和生存至关重要。通过研究这一过程，我们对自然的复杂性有了更深刻的认识，以及生物体如何适应其周围环境。最终，理解abscission不仅丰富了我们对生物学的知识，也为可持续食品生产提供了农业实践的指导。