褪黑激素在采后果蔬低温胁迫耐受性中的作用机制

Renu Bhardwaj, Hansika Sati, Harinder Singh Oberoi, Sunil Pareek
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引用次数: 0

摘要

新鲜水果和蔬菜的低温贮藏,尤其是低于临界贮藏温度的贮藏,会导致冷害,使产品不适合在市场上销售。采后施用褪黑激素以减轻水果和蔬菜的冷害是一种替代性预防措施,可使新鲜农产品在市场上更持久地销售。本综述将褪黑激素介导的耐寒机制分为生理、生化(糖代谢、有机酸、木质化和呼吸调节、成熟、衰老、膜结构、抗氧化系统维护、内源性脯氨酸、内源性多胺、γ-氨基丁酸分流途径和能量状态调节)和激素(乙烯、吲哚乙酸、茉莉酸和脱落酸调节)途径。褪黑激素通过多种机制发挥作用,包括提高抗氧化活性、诱导抗氧化酶、基因表达调节、γ-氨基丁酸分流途径、诱导抗逆蛋白和稳定细胞膜。然而,需要优化暴露的剂量和持续时间,以及大规模生产褪黑激素的替代方法,才能促进褪黑激素的应用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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The mechanisms of melatonin in low-temperature stress tolerance in postharvest fruits and vegetables

Low-temperature storage of fresh fruits and vegetables, especially below the critical storage temperatures, leads to chilling injury that makes the produce unsuitable for market use. Postharvest application of melatonin for chilling injury alleviation in fruits and vegetables is an alternative preventive measure for the longer persistence of fresh produce on the market. This review classified the mechanisms involved in melatonin-mediated chilling tolerance into physiological, biochemical (sugar metabolism, organic acids, lignification and respiratory modulation, ripening, senescence, membrane structure, maintenance of the antioxidant system, endogenous proline, endogenous polyamine, γ-amino butyric acid shunt pathway, and modulation of energy status), and hormonal (ethylene, indole acetic acid, jasmonic acid, and abscisic acid regulation) pathways. Melatonin acted via several mechanisms, including antioxidant activity elevation, induction of antioxidant enzymes, gene expression regulation, gamma-aminobutyric acid shunt pathway, induction of stress-tolerant proteins, and cell membrane stabilization. However, dose and duration of exposure optimization, along with alternative means for mass production of melatonin, is required to promote trails.

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