Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China; University of Chinese Academy of Sciences, Beijing 100049, China; Department of Horticulture, Patuakhali Science and Technology University, Patuakhali, Bangladesh.
Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China; University of Chinese Academy of Sciences, Beijing 100049, China; Department of Horticulture, Patuakhali Science and Technology University, Patuakhali, Bangladesh.
Food Chem. 2019 Jun 15;283:665-674. doi: 10.1016/j.foodchem.2019.01.060. Epub 2019 Jan 18.
Abscisic acid (ABA) has been advocated to play substantial role on ripening of non-climacteric fruit. Here we report that alginate oligosaccharide (AOS) postharvest treatments delayed the accumulation of ABA and ABA-conjugates and restrained the expression of ABA signaling genes, resulting enlarged storage life of strawberry. In addition, AOS postharvest treatments also increased the quality and reduced the degradation of cell wall components and repressed the expression of cell wall degradation genes. AOS treated fruits exhibited significant delays of hardness, decay percentage, titratable acidity, pH, total soluble solids and vitamin C content compared to untreated fruits. Moreover, AOS had a positive effect on retaining higher amount of anthocyanin, total phenol and flavonoids contents. The finding of this study suggests that AOS postharvest treatments are very useful for preserving fruit quality and enhancing shelf life by delayed ABA accretion, restrained the gene expression related to ABA signaling and cell wall degeneration.
脱落酸（ABA）被认为在非跃变型果实成熟过程中发挥重要作用。在这里，我们报告了海藻酸钠寡糖（AOS）采后处理延迟了 ABA 和 ABA 结合物的积累，并抑制了 ABA 信号基因的表达，从而延长了草莓的贮藏寿命。此外，AOS 采后处理还增加了果实的品质，降低了细胞壁成分的降解，并抑制了细胞壁降解基因的表达。与未处理的果实相比，AOS 处理的果实硬度、腐烂率、可滴定酸度、pH 值、总可溶性固形物和维生素 C 含量的下降明显延迟。此外，AOS 处理对保持较高的花色苷、总酚和类黄酮含量有积极作用。本研究结果表明，AOS 采后处理通过延迟 ABA 的积累，抑制与 ABA 信号和细胞壁降解相关的基因表达，对保持果实品质和延长货架期非常有用。
