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    Natural Compounds and Oxidative Stress Management
    (Springer, Singapore, 2025) Ruchi Yadav, Namira Sana, Uzma Afaq, Chand Bibi, Jahanarah Khatoon
    Natural compounds and their bioactive derivatives are rich sources of antioxidants, including flavonoids, anthocyanin, polyphenols, lignans, carotenoids, and vitamins. Antioxidants can manage oxidative stress-related infections and chronic inflammation by boosting the immune system. A resilient immune system will neutralize harmful free radicals in our body and reduce their levels. The trigger factor for production of oxidative stress is an imbalanced state between free radical formations to available antioxidants present in the body. Natural plant extracts exhibit multi-therapeutic effects by modulating diverse biochemical pathways. Additionally, the lower toxicity associated with natural products and their secondary metabolites reduces the risk of side effects. Antioxidants can regulate both stress-induced signaling pathways and oxidative defensive pathways. Secondary metabolites extracted from natural compounds exhibit both antioxidant and anti-inflammatory activities. Antioxidants’ ability to scavenge reactive oxygen species (ROS) makes them promising candidates for treating several illnesses, such as neurodegenerative diseases, diabetes, and cancer. This book chapter highlights the therapeutic effects ingrained in natural sources of antioxidants and tries to shed light on exploring the exact mechanism behind the therapeutic effects.
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    Enzymatic and nonenzymatic antioxidant defense in plants under cold or chilling stress
    (Academic Press, 2025) Abdul Mazeed, Mohammad Israil Ansari, Nilofer
    Exposure to temperatures between 0 and 20°C that do not approach freezing is known as chilling, and it has long been recognized as a major stressor on plant growth, especially for agricultural species that originate in tropical or subtropical regions. While cooling stress can be detrimental, there are some processes in which it is advantageous. For instance, in many plant species, cooling is an essential environmental signal during vernalization, the process that triggers the change from vegetative development to blooming. Stratification, or the chilling of ingested seeds, is frequently necessary to break seed dormancy. Furthermore, cooling is essential for causing buds to become dormant in the fall (Heide & Prestrud, 2005). Through a process called cold-hardening or cold acclimation, chilling also helps some species acquire a resistance to freezing. All plants, however, view their first encounter with cooling or a drop in temperature as a stressor. Certain plants have the ability to adjust to this stress and acquire a tolerance to cold, but in other species, the exposure to stress causes certain developmental reactions.