dichogamy

简明释义

英[daɪˈkɒɡəmɪ]美[daɪˈkɑɡəmi]

n. 雌雄蕊异熟；敌敌畏

英英释义

单词用法

同义词

反义词

例句

1.A combination of dichogamy and herkogamy in hermaphroditic plants is an effective mechanism to encourage outcrossing and avoid selfing.

雌雄异熟和异型花在一些被子植物中的共同存在被认为是一种有效避免两性花植物自交并促进异交的机制。

2.A combination of dichogamy and herkogamy in hermaphroditic plants is an effective mechanism to encourage outcrossing and avoid selfing.

雌雄异熟和异型花在一些被子植物中的共同存在被认为是一种有效避免两性花植物自交并促进异交的机制。

3.A combination of dichogamy and herkogamy in hermaphroditic plants is an effective mechanism to encourage outcrossing.

雌雄异熟和雌雄异位共同存在于两性植物中是一种有效促进异交的机制。

4.In many flowering plants, dichogamy 异熟现象 plays a crucial role in preventing self-pollination.

在许多开花植物中，dichogamy 异熟现象 在防止自花授粉中起着关键作用。

5.The study of dichogamy 异熟现象 helps botanists understand plant reproductive strategies.

对dichogamy 异熟现象的研究帮助植物学家理解植物的繁殖策略。

6.Some species exhibit dichogamy 异熟现象 to enhance genetic diversity among their offspring.

一些物种表现出dichogamy 异熟现象，以增强后代的遗传多样性。

7.Understanding dichogamy 异熟现象 can aid in the conservation of rare plant species.

理解dichogamy 异熟现象可以帮助保护稀有植物物种。

8.In agriculture, dichogamy 异熟现象 is considered when breeding new crop varieties.

在农业中，培育新作物品种时会考虑dichogamy 异熟现象。

作文

In the world of botany, the concept of reproduction is complex and fascinating. One term that often arises in discussions about plant reproductive strategies is dichogamy. This term refers to a reproductive strategy in which the male and female organs of a flower mature at different times. This temporal separation can help prevent self-pollination and promote cross-pollination, thereby increasing genetic diversity among plant populations. Plants exhibit various reproductive strategies to adapt to their environments, and dichogamy is one of the most intriguing. In species that utilize this method, the anthers (the part of the stamen that produces pollen) may release pollen before the stigma (the part of the pistil that receives pollen) is ready to accept it, or vice versa. This ensures that pollen from one flower has a higher chance of fertilizing another flower, rather than its own. The advantages of dichogamy are significant. By promoting cross-pollination, plants can enhance their genetic variability, which is crucial for adapting to changing environmental conditions. For instance, when a plant species faces a new disease or a shift in climate, having a diverse gene pool can help some individuals survive and reproduce, ensuring the continuation of the species. Additionally, cross-pollination can lead to offspring that are more vigorous and resilient compared to those produced through self-pollination. Several examples of dichogamy can be found in nature. One well-known example is the common garden snapdragon (Antirrhinum majus). In this species, the flowers exhibit protandry, where the male parts mature and shed pollen before the female parts are receptive. This timing encourages pollinators, like bees, to visit multiple flowers, facilitating the transfer of pollen between different plants. Another example is seen in certain species of orchids, which often display dichogamy as a means to attract specific pollinators. These plants have evolved intricate mechanisms to ensure that their reproductive organs do not function simultaneously, thus enhancing the likelihood of cross-pollination by specialized insects. However, dichogamy is not without its challenges. In some cases, the timing of maturation can be influenced by environmental factors such as temperature and humidity. If these conditions fluctuate unexpectedly, it can disrupt the delicate balance required for successful reproduction. Additionally, if pollinators are scarce or if they do not visit flowers at the right time, plants may miss the opportunity for cross-pollination, leading to reduced reproductive success. In conclusion, dichogamy represents a remarkable adaptation in the plant kingdom, showcasing the intricate relationships between plants and their pollinators. By understanding this concept, we gain insight into the evolutionary strategies that plants employ to thrive in their environments. As we continue to study and appreciate the complexities of plant reproduction, it becomes increasingly clear that terms like dichogamy are essential for grasping the broader picture of biodiversity and ecological resilience. The study of such reproductive strategies not only enriches our knowledge of botany but also underscores the importance of conserving the diverse ecosystems that support these incredible life forms.

dichogamy（异熟）是一个植物学术语，指的是一种生殖策略，其中花的雄性和雌性器官在不同时间成熟。这种时间上的分离可以帮助防止自花授粉，促进异花授粉，从而增加植物群体之间的遗传多样性。