亚热带植物科学2023，Vol.52Issue(6)：475-480,6.DOI:10.3969/j.issn.1009-7791.2023.06.002
不同浓度褪黑素对采后蓝莓果实硬度和果胶的影响
Effects of Different Concentrations of Melatonin Treatment on the Hardness and Pectin of Postharvest Blueberry Fruits
摘要
Abstract
In response to the issues of difficult storage and decreased hardness of blueberries after picking,this experiment used blueberries as materials and treated them with different concentrations of melatonin(0,50,100,and 150 mg·L-1).The hardness,pectin content,pectin methylesterase(PME)activity,polygalacturonase(PG)activity,pectin lyase(PL)activity,β-galactosidase(β-GAL)activity,degree of pectin methylation,β-eliminating reaction degree,H2O2 and malondialdehyde(MDA)content were measured to explore the mechanism of melatonin's effect on blueberry fruit preservation.The results showed that different concentrations of melatonin treatment could delay the decrease of blueberry hardness,but the effect was not significant when the treatment concentration was low(50 mg·L-1).The 150 mg·L-1 melatonin treatment had the best preservation effect on blueberry fruit,maintaining pectin content and inhibiting PG,PL,PME,and β-GAL activity of cell wall degrading enzymes,reducing the demethylation of pectin.These results indicated that melatonin could delay the degradation of cell wall polysaccharides by inhibiting enzyme activity,which was feasible for post harvest preservation of blueberry fruits.关键词
外源褪黑素/硬度/细胞壁多糖/细胞壁降解酶/蓝莓Key words
exogenous melatonin/hardness/cell wall polysaccharides/cell wall degrading enzymes/blueberry分类
农业科技引用本文复制引用
孙萌萌,陶乐仁..不同浓度褪黑素对采后蓝莓果实硬度和果胶的影响[J].亚热带植物科学,2023,52(6):475-480,6.基金项目
上海市科委科研计划项目(13DZ2260900) （13DZ2260900）
