phototropism

简明释义

英[ˌfəʊtəʊˈtrəʊpɪzəm]美[ˌfoʊtoʊˈtroʊpɪzəm]

n. [生物] 向光性；[物] 趋光性

英英释义

单词用法

同义词

反义词

例句

1.If root cap was shaded when the root was irradiated, the root showed no negative phototropism 'And the root lost the characteristics of negative phototropism when root cap was divested completely.

对根冠遮光而给根尖其他部分照光时，稻根不发生负向光性反应。

2.If root cap was shaded when the root was irradiated, the root showed no negative phototropism 'And the root lost the characteristics of negative phototropism when root cap was divested completely.

对根冠遮光而给根尖其他部分照光时，稻根不发生负向光性反应。

3.Nowadays, studies on gravitropism and phototropism are active aspects in the field of plant physiology, many details of which have been studied.

植物的向重力性和向光性是目前植物生理学领域研究的热点，已进行了大量的研究。

4.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。

5.It suggested that the blue light receptor might be the photoreceptor for the negative phototropism in rice root.

推测稻根负向光性的光受体可能为蓝光受体。

6.The invention discloses a negative phototropism module and its pervasion plate structure.

本发明公开了一种背光模块及所使用的扩散板结构。

7.The study of phototropism reveals how plants grow towards light.

对光向性的研究揭示了植物如何朝向光生长。

8.In a dark room, the lack of phototropism makes it difficult for plants to thrive.

在黑暗的房间里，缺乏光向性使植物难以生存。

9.Understanding phototropism helps gardeners position their plants for optimal sunlight exposure.

理解光向性可以帮助园丁合理安排植物的位置，以获得最佳阳光照射。

10.Some researchers are investigating how phototropism affects plant growth in urban environments.

一些研究人员正在调查光向性如何影响城市环境中的植物生长。

11.The phenomenon of phototropism is crucial for plants to maximize photosynthesis.

植物的光向性现象对最大化光合作用至关重要。

作文

Plants exhibit a fascinating phenomenon known as phototropism, which is their natural response to light. This biological behavior allows plants to grow towards a light source, optimizing their ability to photosynthesize and thrive. The term phototropism comes from the Greek words 'photo,' meaning light, and 'tropism,' meaning turning or responding to a stimulus. Understanding phototropism is essential not only for botanists but also for anyone interested in gardening or agriculture. When a plant is exposed to light from one direction, it responds by growing towards that light source. This response is primarily due to the unequal distribution of a plant hormone called auxin. Auxins are crucial for plant growth and development. When light shines on one side of a plant, auxins accumulate on the shaded side, causing those cells to elongate more than the cells on the light-exposed side. As a result, the plant bends towards the light, demonstrating phototropism. This mechanism ensures that the plant maximizes its exposure to sunlight, which is vital for photosynthesis—the process through which plants convert light energy into chemical energy. The significance of phototropism extends beyond mere survival; it plays a critical role in the ecosystem. Plants that effectively utilize light through phototropism contribute to the overall health of their environment. They provide oxygen, food, and habitat for various organisms. Moreover, understanding this phenomenon can help farmers and gardeners make informed decisions about plant placement and care. For instance, knowing how different plants respond to light can guide individuals in choosing optimal locations for planting, ensuring that each species receives adequate sunlight for growth. In addition to enhancing agricultural practices, phototropism has implications for scientific research and technology. Researchers study this phenomenon to develop better agricultural techniques and improve crop yields. By manipulating light conditions, scientists can optimize plant growth and productivity. Furthermore, the principles of phototropism have inspired innovations in robotics and engineering. Engineers are exploring ways to create robots that can mimic this natural response to light, leading to advancements in fields such as solar energy collection. However, it is essential to note that not all plants respond to light in the same way. Some species exhibit negative phototropism, where they grow away from light sources. This behavior is observed in certain fungi and other organisms that thrive in shaded environments. Understanding these variations is crucial for comprehending the diverse strategies plants employ to adapt to their surroundings. In conclusion, phototropism is a remarkable example of how plants interact with their environment. This phenomenon not only highlights the intricate mechanisms of plant growth but also underscores the importance of light in the life of a plant. By studying phototropism, we gain insights into the complex relationships between organisms and their habitats. Whether you are a scientist, gardener, or simply an enthusiast of nature, appreciating the role of phototropism can deepen your understanding of the natural world and inspire you to cultivate a greater appreciation for the wonders of plant life.

植物表现出一种迷人的现象，称为光向性，这是它们对光的自然反应。这种生物行为使植物能够朝向光源生长，从而优化它们进行光合作用和繁茂生长的能力。术语光向性来自希腊词“photo”，意为光，以及“tropism”，意为转向或对刺激的反应。理解光向性不仅对植物学家至关重要，对任何对园艺或农业感兴趣的人来说也同样重要。 当植物暴露在一个方向的光线下时，它会通过朝向该光源生长来做出反应。这种反应主要是由于一种叫做生长素的植物激素的不均匀分布。生长素对植物的生长和发育至关重要。当光线照射到植物的一侧时，生长素会在阴暗的一侧积累，导致那些细胞的伸长程度大于暴露在光线下的细胞。因此，植物向光弯曲，展示了光向性。这一机制确保植物最大限度地接触阳光，这对光合作用至关重要——植物将光能转化为化学能的过程。 光向性的重要性超越了生存本身；它在生态系统中发挥着关键作用。有效利用光的植物通过光向性为其环境的整体健康做出贡献。它们提供氧气、食物和各种生物的栖息地。此外，了解这一现象可以帮助农民和园丁做出明智的植物摆放和护理决策。例如，了解不同植物如何对光作出反应，可以指导个人选择最佳的种植地点，确保每个物种都能获得足够的阳光以促进生长。 除了增强农业实践外，光向性还对科学研究和技术具有重要意义。研究人员研究这一现象，以开发更好的农业技术，提高作物产量。通过操纵光照条件，科学家可以优化植物的生长和生产力。此外，光向性的原理启发了机器人和工程领域的创新。工程师正在探索创造能够模仿这种自然光响应的机器人，从而推动太阳能收集等领域的进步。 然而，必须注意，并非所有植物以相同的方式对光作出反应。某些物种表现出负光向性，即它们远离光源生长。这种行为在某些真菌和其他在阴暗环境中茁壮成长的生物中被观察到。理解这些变化对理解植物为适应其环境所采用的多样化策略至关重要。 总之，光向性是植物如何与环境互动的一个显著例子。这一现象不仅突显了植物生长的复杂机制，还强调了光在植物生命中的重要性。通过研究光向性，我们可以深入了解生物体与栖息地之间复杂的关系。无论你是科学家、园丁，还是仅仅是自然爱好者，欣赏光向性的作用都能加深你对自然世界的理解，并激励你培养对植物生命奇迹的更大欣赏。