anatropous

简明释义

英[əˈnætrəpəs]美[əˈnætrəpəs]

adj. [植] 倒生的

英英释义

单词用法

同义词

反义词

例句

1.When ovule orientation is orthotropous the chalaza corresponds to the point where the funicle is attached but in anatropous and campylotropous ovules the chalaza is some distance from the funicle .

当胚珠的方向是直生胚珠时，合点和珠柄连成一条直线，当胚珠是倒生胚珠或弯生胚珠时，合点和珠柄之间有一定的距离。

2.When ovule orientation is orthotropous the chalaza corresponds to the point where the funicle is attached but in anatropous and campylotropous ovules the chalaza is some distance from the funicle .

当胚珠的方向是直生胚珠时，合点和珠柄连成一条直线，当胚珠是倒生胚珠或弯生胚珠时，合点和珠柄之间有一定的距离。

3.The ovule of tomato is anatropous.

番茄的胚珠倒生。

4.The anatropous arrangement of the ovule is crucial for successful fertilization in some species.

在某些物种中，胚珠的反转排列对成功受精至关重要。

5.Many flowering plants have anatropous seeds that help in their dispersal mechanism.

许多开花植物具有反转种子，有助于它们的传播机制。

6.Understanding the structure of anatropous seeds can aid in agricultural practices.

理解反转种子的结构可以帮助农业实践。

7.In botany, an anatropous ovule is one that has its micropyle directed towards the funiculus.

在植物学中，反转胚珠是指其小孔指向种柄的胚珠。

8.The seed of the plant is described as anatropous, meaning it turns during development to lie with its hilum facing downwards.

该植物的种子被描述为反转，意为在发育过程中转动，使其种脐朝下。

作文

In the vast world of botany, understanding the various seed structures is crucial for comprehending plant development and reproduction. One interesting type of seed structure is known as anatropous seeds. These seeds exhibit a unique orientation that plays a significant role in their growth and germination. The term anatropous refers to seeds that are inverted during their development, causing the micropyle, which is the opening through which the pollen tube enters, to face downward. This inversion can be observed in many flowering plants, particularly in the family of legumes. The significance of anatropous seeds lies in their evolutionary advantages. By having the micropyle positioned at the bottom, these seeds are often better equipped to absorb water and nutrients from the soil upon germination. This adaptation enhances their chances of survival and successful establishment in a variety of environments. Additionally, the anatropous orientation can help protect the delicate embryo within the seed as it develops, shielding it from potential damage caused by external factors such as pests or harsh weather conditions.Moreover, the study of anatropous seeds provides insight into the diversity of seed morphology across different plant species. For instance, while some plants produce seeds that remain orthotropous, meaning they maintain a straight orientation with the micropyle facing upwards, others have evolved to adopt the anatropous form. This variation in seed design reflects the adaptability of plants to their surroundings and the various strategies they employ to ensure reproductive success.In practical terms, understanding the characteristics of anatropous seeds can also benefit agriculture and horticulture. Farmers and gardeners can utilize this knowledge to improve planting techniques, ensuring that seeds are sown in a manner that aligns with their natural orientation. Proper planting can lead to enhanced germination rates and healthier plants, ultimately contributing to more efficient crop production. Furthermore, the exploration of anatropous seeds opens up avenues for research in plant breeding and genetic modification. Scientists can investigate how manipulating seed orientation could lead to the development of new plant varieties with improved resilience to environmental stresses or increased yields. This ongoing research highlights the importance of seed structure in the broader context of food security and sustainable agriculture.In conclusion, the concept of anatropous seeds is not merely a botanical curiosity; it is a vital aspect of plant biology that holds significant implications for ecology, agriculture, and evolutionary studies. By delving deeper into the nature of anatropous seeds, we can gain a greater appreciation for the intricate mechanisms that govern plant life and the diverse strategies they employ to thrive in their respective habitats. As we continue to explore the wonders of the botanical world, the study of seed structures like anatropous will undoubtedly remain an important area of focus for researchers and enthusiasts alike.

在植物学的广阔世界中，理解各种种子结构对于理解植物的发展和繁殖至关重要。一个有趣的种子结构类型被称为反转种子。这些种子表现出一种独特的取向，这在它们的生长和发芽中起着重要作用。术语反转种子指的是在发育过程中发生倒置的种子，导致胚孔（即花粉管进入的开口）朝下。这种倒置可以在许多开花植物中观察到，特别是在豆科植物中。反转种子的重要性在于它们的进化优势。通过将胚孔置于底部，这些种子通常更能有效地吸收土壤中的水分和养分，从而增强它们的存活几率和成功建立的机会。此外，反转种子的取向还可以帮助保护种子内部的脆弱胚胎，因为它在发育过程中受到外部因素（如害虫或恶劣天气条件）造成的潜在损害。此外，研究反转种子提供了对不同植物物种种子形态多样性的深入了解。例如，虽然一些植物产生的种子保持正向，即胚孔朝上，但其他植物已经进化为采用反转种子的形式。这种种子设计的变化反映了植物对其环境的适应能力以及它们确保繁殖成功所采用的各种策略。在实践层面上，理解反转种子的特征也可以使农业和园艺受益。农民和园丁可以利用这一知识来改善种植技术，确保种子以符合其自然取向的方式播种。适当的种植可以提高发芽率和植物健康，从而最终促进更高效的作物生产。此外，探索反转种子为植物育种和基因改造的研究开辟了新的途径。科学家可以研究如何操纵种子取向，以开发出对环境压力具有更强抗性的新品种或提高产量。这项持续的研究突显了种子结构在食品安全和可持续农业更广泛背景下的重要性。总之，反转种子的概念不仅仅是植物学的好奇心；它是植物生物学的一个重要方面，对生态学、农业和进化研究具有重要影响。通过深入探讨反转种子的本质，我们可以更好地欣赏调控植物生命的复杂机制，以及它们在各自栖息地中生存的多样化策略。随着我们继续探索植物世界的奇观，像反转种子这样的种子结构的研究无疑将继续成为研究人员和爱好者的重要关注领域。