geotropism

简明释义

英[ˌdʒiːə(ʊ)ˈtrəʊpɪz(ə)m]美[dʒiˈɑtrəˌpɪzəm]

n. [植] 向地性；屈地性

英英释义

单词用法

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例句

1.The hairy roots transformed by ATCC15834 grew rapidly on MS medium without any phytohormones, and were characterized by strongly branching, clustering and non-geotropism, etc.

ATCC 15834菌株诱导牛膝产生的毛状根可在无任何激素的MS培养基上快速生长，且具有分枝性强、丛生、无向地性等特点。

2.The hairy roots transformed by ATCC15834 grew rapidly on MS medium without any phytohormones, and were characterized by strongly branching, clustering and non-geotropism, etc.

ATCC 15834菌株诱导牛膝产生的毛状根可在无任何激素的MS培养基上快速生长，且具有分枝性强、丛生、无向地性等特点。

3.The roots of the plant exhibit geotropism, which means they grow downward in response to gravity.

植物的根部表现出地向性，这意味着它们向下生长以响应重力。

4.In a microgravity environment, the lack of geotropism can affect plant growth significantly.

在微重力环境中，缺乏地向性会显著影响植物的生长。

5.Researchers study geotropism to understand how plants orient themselves in different environments.

研究人员研究地向性以了解植物如何在不同环境中定向。

6.The phenomenon of geotropism ensures that roots always grow downwards and stems grow upwards.

这一地向性现象确保了根部总是向下生长，而茎部则向上生长。

7.Understanding geotropism can help farmers optimize their planting strategies.

理解地向性可以帮助农民优化他们的种植策略。

作文

Geotropism is a fascinating phenomenon observed in plants, which refers to their growth response to gravity. This biological response plays a critical role in how plants orient themselves in their environment. When we think about the natural world, we often take for granted how plants grow upward towards the light while their roots delve downward into the soil. This behavior is largely due to the process of geotropism (地向性), which ensures that plants can effectively anchor themselves and gather nutrients from the ground while maximizing their exposure to sunlight. Plants exhibit two types of geotropism (地向性): positive and negative. Positive geotropism (地向性) occurs when plant roots grow downwards, toward the gravitational pull. This is essential for stability and nutrient uptake. On the other hand, negative geotropism (地向性) is observed when stems and leaves grow upwards, away from the gravitational force. This upward growth is crucial for the plant’s photosynthesis process, as it allows leaves to capture sunlight more effectively. The mechanism behind geotropism (地向性) involves specialized cells within the plant known as statocytes, which contain statoliths—small dense organelles that settle under the influence of gravity. When a plant is positioned normally, these statoliths help determine the direction of growth. However, if the plant tilts or changes orientation, the statoliths shift, signaling the plant to adjust its growth direction accordingly. This remarkable ability to sense and respond to gravity is vital for the plant's survival and overall health. Understanding geotropism (地向性) not only provides insight into plant biology but also has practical applications in agriculture and horticulture. For instance, farmers can manipulate the growth patterns of crops by adjusting planting techniques and soil conditions to enhance yield. By understanding how different plants respond to geotropism (地向性), agricultural practices can be optimized for better growth and productivity. Moreover, geotropism (地向性) can also be exploited in the field of biotechnology. Scientists are researching ways to genetically modify plants to enhance their growth responses to environmental factors. This could lead to the development of crops that are more resilient to harsh conditions, such as drought or poor soil quality. In conclusion, geotropism (地向性) is an essential aspect of plant life that demonstrates the incredible adaptability of nature. It highlights how plants have evolved sophisticated mechanisms to thrive in their environments. As we continue to explore the complexities of plant biology, the study of geotropism (地向性) will undoubtedly reveal even more about how life on Earth is interconnected and how we can harness this knowledge for sustainable practices in agriculture and beyond.