博文
请教黄花蒿为什么[要制造]“会产生”青蒿素
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刚读了点科普，明白了青蒿素为什么能抗疟。
现在的问题是，这种存在过氧键的化合物并不稳定，植物是怎么制造出来的？黄花蒿这样的植物为什么[要]会在体内[制造]产生青蒿素？有什么进化论的意义吗？
希望生物化学达人能够解答。
【似乎搜到答案了：
Hydrogen Peroxide in Plants: a Versatile Molecule of the Reactive Oxygen Species Network
Li-Juan Quan, Bo Zhang, Wei-Wei Shi, Hong-Yu Li
Article first published online: 7 JAN 2008
DOI: 10.1111/j.1744-7909.2007.00599.x
Journal of Integrative Plant Biology
Volume 50, Issue 1, pages 2–18, January 2008
Keywords: antioxidant system; gene regulation; hydrogen peroxide (H2O2); reactive oxygen species (ROS); signaling molecule
Abstract: Plants often face the challenge of severe environmental conditions, which include various biotic and abiotic stresses that exert adverse effects on plant growth and development. During evolution, plants have evolved complex regulatory mechanisms to adapt to various environmental stressors. One of the consequences of stress is an increase in the cellular concentration of reactive oxygen species (ROS), which are subsequently converted to hydrogen peroxide (H2O2). Even under normal conditions, higher plants produce ROS during metabolic processes. Excess concentrations of ROS result in oxidative damage to or the apoptotic death of cells. Development of an antioxidant defense system in plants protects them against oxidative stress damage. These ROS and, more particularly, H2O2, play versatile roles in normal plant physiological processes and in resistance to stresses. Recently, H2O2 has been regarded as a signaling molecule and regulator of the expression of some genes in cells. This review describes various aspects of H2O2 function, generation and scavenging, gene regulation and cross-links with other physiological molecules during plant growth, development and resistance responses.
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https://blog.sciencenet.cn/blog-70036-487001.html
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