abscisic acid

简明释义

阿伯喂酸

英英释义

例句

1.Researchers are studying how abscisic acid affects seed dormancy.

研究人员正在研究脱落酸如何影响种子休眠。

2.The application of abscisic acid can improve fruit ripening.

施用脱落酸可以改善水果的成熟。

3.In drought conditions, plants produce more abscisic acid to conserve water.

在干旱条件下，植物会产生更多的脱落酸以节约水分。

4.Scientists found that abscisic acid plays a key role in leaf senescence.

科学家发现脱落酸在叶片衰老中起着关键作用。

5.The role of abscisic acid in plant stress response is crucial.

在植物应激反应中，脱落酸的作用至关重要。

作文

Abscisic acid, often abbreviated as ABA, is a plant hormone that plays a crucial role in various physiological processes. It was first discovered in the 1960s and has since been recognized for its importance in plant growth and development. One of the primary functions of abscisic acid (脱落酸) is to regulate the plant's response to environmental stress, such as drought and salinity. When plants experience water deficiency, abscisic acid (脱落酸) is synthesized in the leaves and transported to other parts of the plant. This hormone helps to close the stomata, the tiny openings on the leaf surface, which reduces water loss through transpiration.In addition to its role in water regulation, abscisic acid (脱落酸) also influences seed dormancy and germination. High levels of abscisic acid (脱落酸) during seed development ensure that seeds remain dormant until conditions are favorable for germination. This mechanism is vital for the survival of many plant species, especially in unpredictable environments. Once the environmental conditions improve, such as the presence of adequate moisture, the levels of abscisic acid (脱落酸) decrease, allowing the seeds to germinate and grow.Moreover, abscisic acid (脱落酸) plays a role in regulating plant growth by inhibiting cell division and elongation. This inhibition is particularly important during periods of stress, as it conserves energy and resources for the plant. By controlling growth, abscisic acid (脱落酸) ensures that the plant can allocate its energy towards survival rather than unnecessary growth.Research has shown that abscisic acid (脱落酸) also interacts with other plant hormones, such as gibberellins and auxins, to maintain a balance in growth and development. For example, while gibberellins promote growth and seed germination, abscisic acid (脱落酸) counteracts these effects under stress conditions. This intricate hormonal interplay is vital for the plant's adaptation to changing environments.The significance of abscisic acid (脱落酸) extends beyond individual plants; it has implications for agriculture and food production. Understanding how this hormone works can help scientists develop strategies to enhance crop resilience against environmental stresses. For instance, genetically engineering crops to have higher levels of abscisic acid (脱落酸) could lead to varieties that are more drought-resistant, thereby improving yields in arid regions.In conclusion, abscisic acid (脱落酸) is a vital plant hormone that regulates various physiological processes, particularly in response to environmental stress. Its roles in water regulation, seed dormancy, and growth inhibition highlight its importance in plant survival and adaptation. As research continues to uncover the complexities of abscisic acid (脱落酸) and its interactions with other hormones, we can look forward to advancements in agricultural practices that leverage this knowledge for sustainable food production.

脱落酸，通常缩写为ABA，是一种植物激素，在各种生理过程中发挥着至关重要的作用。它于20世纪60年代首次被发现，随后因其在植物生长和发育中的重要性而受到认可。脱落酸的主要功能之一是调节植物对环境压力的反应，例如干旱和盐碱。当植物经历水分不足时，叶片中合成脱落酸并运输到植物的其他部分。这种激素有助于关闭气孔，即叶面上的微小开口，从而减少蒸腾作用导致的水分流失。除了在水分调节中的作用外，脱落酸还影响种子的休眠和发芽。在种子发育期间，高水平的脱落酸确保种子保持休眠状态，直到条件适合发芽。这一机制对于许多植物物种的生存至关重要，特别是在不可预测的环境中。一旦环境条件改善，例如有足够的水分，脱落酸的水平就会降低，允许种子发芽和生长。此外，脱落酸通过抑制细胞分裂和伸长来调节植物生长。这种抑制在压力时期尤其重要，因为它可以节省植物的能量和资源。通过控制生长，脱落酸确保植物能够将能量分配到生存上，而不是不必要的生长上。研究表明，脱落酸还与其他植物激素，如赤霉素和生长素，相互作用，以维持生长和发育的平衡。例如，当赤霉素促进生长和种子发芽时，脱落酸则在压力条件下对抗这些影响。这种复杂的激素相互作用对于植物适应变化的环境至关重要。脱落酸的重要性不仅限于单个植物；它对农业和食品生产也有影响。了解这种激素的工作原理可以帮助科学家制定增强作物抵御环境压力的策略。例如，基因工程改造作物，使其具备更高水平的脱落酸，可能导致更耐旱的品种，从而提高干旱地区的产量。总之，脱落酸是一种重要的植物激素，调节各种生理过程，特别是在对环境压力的反应中。它在水分调节、种子休眠和生长抑制中的作用突显了它在植物生存和适应中的重要性。随着研究不断揭示脱落酸及其与其他激素相互作用的复杂性，我们期待利用这一知识在可持续食品生产中取得农业实践的进步。