phytoalexin

简明释义

英[ˌfaɪtoʊəˈlɛksɪn]美[ˌfaɪtoʊəˈlɛksɪn]

n. 植物抗毒素

英英释义

单词用法

同义词

反义词

例句

1.Substances such as lignin, phytoalexin, active oxygen, salicylic acid are known to play important roles on the plant disease resistance.

木质素、植保素、活性氧、水杨酸等物质已被证明在植物抗病中起了重要作用。

2.Substances such as lignin, phytoalexin, active oxygen, salicylic acid are known to play important roles on the plant disease resistance.

木质素、植保素、活性氧、水杨酸等物质已被证明在植物抗病中起了重要作用。

3.Resveratrol, 3,4', 5-trihydroxystilbene, is a phytoalexin found in grapes, Polygonum Cuspidatum and other plants.

白藜芦醇，3，4’，5-三羟基二苯乙烯，是一种植物抗毒素，常见于葡萄、虎杖和其它一些植物。

4.Also, suggests the existing problems and future research directions of corn phytoalexin.

提出了在玉米植抗素方面存在的问题和今后的研究方向。

5.Research shows that phytoalexin levels increase in response to fungal infections.

研究表明，面对真菌感染时，植物抗生素水平会增加。

6.Breeding programs aim to enhance the production of phytoalexin in crops.

育种项目旨在提高农作物中植物抗生素的产生。

7.Certain fruits contain high concentrations of phytoalexin, which may have health benefits.

某些水果含有高浓度的植物抗生素，可能具有健康益处。

8.The mechanism of phytoalexin synthesis is a key focus in plant pathology studies.

在植物病理学研究中，植物抗生素合成机制是一个关键焦点。

9.The plant produces phytoalexin to defend itself against pathogens.

植物产生植物抗生素来抵御病原体。

作文

Plants have evolved a variety of defense mechanisms to protect themselves from pathogens and pests. One of the most fascinating of these mechanisms is the production of compounds known as phytoalexins. These are antimicrobial substances that are synthesized by plants in response to stress, such as infection by fungi or bacteria. When a plant is attacked, it can produce phytoalexins as a way to inhibit the growth of the invading organisms. This natural defense system is crucial for the survival of many plant species and plays a significant role in agriculture and horticulture.The term phytoalexin comes from the Greek word 'phyto', meaning plant, and 'alexin', which means to defend. These compounds are typically low molecular weight metabolites that are produced rapidly after the initial attack. For instance, when a plant is wounded or infected, it may release signals that trigger the synthesis of phytoalexins. This process not only helps the plant to fend off the immediate threat but also prepares it for potential future attacks.Different plants produce different types of phytoalexins, and their effectiveness can vary widely. Some common examples include resveratrol in grapes, which has been shown to be effective against certain fungal pathogens, and camalexin in Arabidopsis, a model organism in plant biology. The diversity of phytoalexins across species highlights the complexity of plant defense strategies and the evolutionary pressures that have shaped them.Research into phytoalexins has significant implications for agriculture. By understanding how these compounds work, scientists can develop new strategies to enhance plant resistance to diseases. For example, breeding programs can focus on cultivating varieties of crops that naturally produce higher levels of phytoalexins. Additionally, biotechnological approaches could be employed to engineer plants with enhanced defensive capabilities, potentially reducing the need for chemical pesticides.Moreover, phytoalexins are not only important for plant health but also for human health. Many of these compounds have been found to possess antioxidant properties and may have potential health benefits when consumed as part of a diet rich in fruits and vegetables. For example, the phytoalexin resveratrol has garnered attention for its possible role in promoting cardiovascular health and longevity.In conclusion, phytoalexins represent a remarkable aspect of plant biology, showcasing the intricate ways in which plants defend themselves against threats. Their study not only enhances our understanding of plant physiology but also opens up new avenues for improving agricultural practices and promoting human health. As we continue to explore the world of phytoalexins, we may uncover even more secrets that these tiny compounds hold, ultimately leading to advancements in both science and sustainability.

植物已经进化出多种防御机制，以保护自己免受病原体和害虫的侵害。其中最引人注目的机制之一是产生称为植物抗生素的化合物。这些是植物在应对压力（如真菌或细菌感染）时合成的抗微生物物质。当植物受到攻击时，它可以产生植物抗生素，以抑制入侵生物的生长。这种自然防御系统对许多植物物种的生存至关重要，并在农业和园艺中发挥着重要作用。“植物抗生素”一词源于希腊语“phyto”，意为植物，以及“alexin”，意为防御。这些化合物通常是低分子量代谢物，在初始攻击后迅速合成。例如，当植物受伤或感染时，它可能释放信号，触发植物抗生素的合成。这个过程不仅帮助植物抵御即时威胁，还为未来可能的攻击做好准备。不同的植物产生不同类型的植物抗生素，其有效性差异很大。一些常见的例子包括葡萄中的白藜芦醇，它已被证明对某些真菌病原体有效，以及阿拉伯芥中的卡梅克辛，这是一种植物生物学模型生物。不同物种之间植物抗生素的多样性突显了植物防御策略的复杂性以及塑造它们的进化压力。对植物抗生素的研究对农业具有重要意义。通过了解这些化合物的作用，科学家可以开发出增强植物抗病能力的新策略。例如，育种项目可以集中培养自然产生更高水平植物抗生素的作物品种。此外，生物技术方法也可以用于工程化具有增强防御能力的植物，从而可能减少对化学农药的需求。此外，植物抗生素不仅对植物健康重要，也对人类健康至关重要。许多这些化合物被发现具有抗氧化特性，并可能在作为富含水果和蔬菜的饮食的一部分时具有潜在的健康益处。例如，植物抗生素白藜芦醇因其可能促进心血管健康和延长寿命而受到关注。总之，植物抗生素代表了植物生物学的一个显著方面，展示了植物如何复杂地防御自身免受威胁。它们的研究不仅增强了我们对植物生理的理解，也为改善农业实践和促进人类健康开辟了新的途径。随着我们继续探索植物抗生素的世界，我们可能会揭示这些微小化合物所蕴藏的更多秘密，最终推动科学和可持续发展的进步。