1-甲基环丙烯对甘薯块根贮藏过程中品质相关指标的影响

以目前广泛栽培的4个鲜食型甘薯品种为材料,研究了1-甲基环丙烯(1-methylcyclopropene,1-MCP)对贮藏过程中甘薯块根品质相关指标的影响。结果表明,1.00μL/L的1-MCP对甘薯块根中可溶性糖、直链淀粉、支链淀粉以及胡萝卜素含量等甘薯品质相关指标有显著影响,并且这种影响因甘薯品种不同而存在明显差异。与对照处理相比,1-MCP处理的4个甘薯品种可溶性糖含量达到高峰值的时间均有所提前,1-MCP显著提高了‘广87’和‘烟薯25’块根中可溶性糖含量峰值。1-MCP显著降低了0~7 d贮藏期间‘广87’、‘烟薯25’和‘龙薯9号’块根中直链淀粉含量,显著提高‘广87’和‘苏薯16’贮藏期间直链淀粉含量峰值,显著降低了‘苏薯16’和‘烟薯25’在贮藏28~120 d期间块根中直链淀粉含量。1-MCP还显著降低了‘苏薯16’和‘龙薯9号’在贮藏28~120 d期间的支链淀粉含量。1-MCP也显著改变了胡萝卜素含量的变化趋势,提前了‘广87’、‘苏薯16’和‘龙薯9号’在贮藏期间胡萝卜素含量达到最低值的时间。

Effect of 1-Methylcyclopropene on the Quality of Sweet Potato Storage Root during Storage

In this study, the effects of 1-methylcyclopropene (1-MCP) on the contents of soluble sugar, amylose, amylopectin
and carotene in fresh sweet potato storage roots of four widely cultivated varieties were studied during storage. The results
showed that 1-MCP had remarkable effect on the quality of sweet potato storage root in terms of soluble sugar, amylose,
amylopectin and carotene. The effects of 1-MCP on different varieties of sweet potatoes were different. Compared to the
control treatment, the soluble sugar content of four sweet potato varieties reached a peak value earlier, and the peak values
of soluble sugar content for ‘Guang 87’ and ‘Sushu 16’ were significantly enhanced in response to 1-MCP. During storage
for 7 days, 1-MCP significantly decreased the amylose content of ‘Guang 87’, ‘Yanshu 25’ and ‘Longshu 9’. Meanwhile,
1-MCP significantly increased the peak amylose content of ‘Guang 87’ and ‘Sushu 16’, but significantly decreased the
amylose content of ‘Sushu 16’ and ‘Yanshu 25’ during the period from day 28 to day 120 of storage. Compared to the control
treatment, 1-MCP significantly decreased the amylopectin contents of ‘Sushu 16’ and ‘Longshu 9’ during the period from
day 28 to day 120 of storage. Moreover, 1-MCP significantly changed the variation trend of carotene content making the
carotene content of ‘Guang 87’, ‘Sushu 16’ and ‘Longshu 9’ reaching their minimum values earlier.