heliotropism

简明释义

英[ˌhiːliˈɒtrəpɪzəm]美[ˌhiːlɪˈɑːtrəpɪzəm]

n. 向日性；趋日性

英英释义

单词用法

同义词

反义词

例句

1.Heliotropism A form of phototropism in which flowers move to point toward the sun, tracking it as it moves across the sky.

趋光性的一种类型，植物的花在一天内朝向太阳，并随着日光照射的方向而转移方位。

2.Heliotropism A form of phototropism in which flowers move to point toward the sun, tracking it as it moves across the sky.

趋光性的一种类型，植物的花在一天内朝向太阳，并随着日光照射的方向而转移方位。

3.In biology class, we learned that heliotropism helps plants optimize photosynthesis.

在生物课上，我们了解到向阳性帮助植物优化光合作用。

4.Some flowers display heliotropism during their blooming stages to attract pollinators.

一些花在开花阶段表现出向阳性，以吸引授粉者。

5.Research on heliotropism can lead to advancements in agricultural practices.

对向阳性的研究可以推动农业实践的进步。

6.The heliotropism of sunflowers is a well-known phenomenon where they follow the sun's path across the sky.

向日葵的向阳性是一个众所周知的现象，它们会跟随太阳在天空中的轨迹移动。

7.Plants exhibit heliotropism by turning their leaves towards the sun to maximize light absorption.

植物通过朝向太阳转动叶子来展示向阳性，以最大化光合作用。

作文

In the study of botany, one fascinating phenomenon is called heliotropism, which refers to the growth or movement of plants in response to sunlight. This natural behavior is particularly evident in sunflowers, whose heads follow the sun's path across the sky. The term heliotropism comes from the Greek words 'helios,' meaning sun, and 'tropos,' meaning turn. Essentially, it describes how certain plants have evolved to optimize their exposure to sunlight, which is crucial for photosynthesis—a process that allows them to produce energy.Understanding heliotropism is vital not only for botanists but also for agricultural practices. Farmers can utilize this knowledge to maximize crop yields by planting sun-tracking varieties that enhance their exposure to sunlight. For example, studies have shown that crops exhibiting heliotropism can increase their growth rates significantly compared to those that do not. This has important implications for food production, especially in regions where sunlight is limited.Moreover, heliotropism is not just restricted to flowering plants. Some trees and shrubs also exhibit this behavior, adjusting their branches and leaves to capture more sunlight as the day progresses. This adaptive strategy highlights the intricate relationship between plants and their environment, showcasing nature's ability to evolve and thrive under varying conditions.The mechanism behind heliotropism involves a combination of hormonal responses and cellular growth patterns. When a plant detects light, it produces auxins—hormones that promote cell elongation. These auxins are distributed unevenly on the shaded side of the plant, causing it to bend towards the light source. This bending motion is what we observe as heliotropism. It is a remarkable example of how organisms can adapt their physical structure to improve survival and growth.Furthermore, heliotropism can be seen in various species beyond just sunflowers. For instance, some climbing plants exhibit this behavior by growing towards the sun while wrapping around nearby structures for support. This ability allows them to reach greater heights and access more sunlight, which is essential for their growth and reproduction.In conclusion, heliotropism is a captivating aspect of plant biology that demonstrates the dynamic interactions between organisms and their environment. By understanding this phenomenon, we can appreciate the complexities of nature and apply this knowledge to enhance agricultural practices. As we face challenges such as climate change and food security, leveraging the principles of heliotropism could play a key role in developing sustainable farming techniques that ensure a stable food supply for future generations.

向日性是植物学研究中的一种迷人现象，指的是植物对阳光的生长或运动反应。这种自然行为在向日葵中尤为明显，其花头随着太阳在天空中的轨迹而移动。术语向日性源自希腊词“helios”，意为太阳，以及“tropos”，意为转动。它基本上描述了某些植物如何进化以优化其阳光暴露，这对光合作用至关重要——这一过程使它们能够产生能量。理解向日性不仅对植物学家至关重要，对农业实践也同样重要。农民可以利用这一知识，通过种植追踪阳光的品种来最大化作物产量。例如，研究表明，表现出向日性的作物相比之下可以显著提高其生长速度。这对食物生产具有重要意义，特别是在阳光有限的地区。此外，向日性并不仅限于开花植物。一些树木和灌木也表现出这种行为，随着一天的推移调整其枝叶以捕获更多阳光。这种适应策略突显了植物与其环境之间复杂的关系，展示了自然在不同条件下进化和繁荣的能力。向日性背后的机制涉及激素反应和细胞生长模式的组合。当植物检测到光线时，它会产生生长素——促进细胞伸长的激素。这些生长素在植物的阴暗侧不均匀分布，导致植物向光源弯曲。这种弯曲运动就是我们观察到的向日性。这是一个令人惊叹的例子，展示了生物体如何适应其物理结构以改善生存和生长。此外，向日性还可在多种物种中观察到。举例来说，一些攀缘植物通过朝向太阳生长，同时围绕附近的结构缠绕来表现出这种行为。这种能力使它们能够达到更高的高度，获取更多阳光，这对它们的生长和繁殖至关重要。总之，向日性是植物生物学中一个引人入胜的方面，展示了生物体与其环境之间的动态互动。通过理解这一现象，我们可以欣赏自然的复杂性，并将这一知识应用于增强农业实践。当我们面临气候变化和食品安全等挑战时，利用向日性的原理可能在开发可持续农业技术方面发挥关键作用，以确保未来几代人的稳定食品供应。