Department of Agronomy, Faculty of Agriculture, Karaj Branch, Islamic Azad University, Karaj, Iran.
Department of Mechanization, Faculty of Agriculture, Science and Research Branch, Islamic Azad University, Tehran, Iran.
J Food Sci Technol. 2013 Apr;50(2):339-45. doi: 10.1007/s13197-011-0337-9. Epub 2011 Apr 1.
The effects of gamma radiation treatment (50 and 100 Gy) on potato tubers irradiated at different days (10th, 30th and 50th) after harvest were studied during 5 months of storage at 10°C using Agria and Marfona varieties. A factorial experiment was done, based on a Randomized Complete Block Design with four replications. The 100 Gy radiation treatments on 10th and 30th days after harvest completely prevented sprouting at both varieties studied but on 50th day only Agria tubers not sprouted. This study indicated that early irradiation and absorbed radiation doses significantly decreased sprouting, percent weight loss and specific gravity of tubers. Reducing sugar content significantly increased by delay in irradiation and lower dose of radiation while non-reducing sugars did not decrease significantly by delay in irradiation and higher dose of radiation. The least increase in reducing sugars (10.2%) and most decrease in non-reducing sugar (-12.75%) were observed in tubers that irradiated on 10th day after harvest. The content of ascorbic acid was decreased by irradiation with higher dose. Although delay in irradiation caused less loss of ascorbic acid (8.5%) but showed greater metabolic changes as sprouting, weight loss, firmness, and sugars contents. Also, more increased delay in irradiation needed higher radiation doses for sprout inhibition.
研究了在 10°C 下贮藏 5 个月期间，收获后不同天数（第 10 天、第 30 天和第 50 天）辐照的马铃薯块茎接受 50 和 100 Gy 伽马射线处理的影响，使用了 Agria 和 Marfona 两个品种。采用完全随机区组设计进行了一项基于因子的实验，设 4 次重复。在收获后第 10 天和第 30 天进行的 100 Gy 辐射处理完全阻止了两个研究品种的发芽，但在第 50 天只有 Agria 块茎没有发芽。这项研究表明，早期辐射和吸收的辐射剂量显著降低了块茎的发芽率、失重率和比重。延迟辐射和降低辐射剂量会显著增加还原糖含量，而非还原糖含量不会因延迟辐射和增加辐射剂量而显著降低。在收获后第 10 天进行辐射处理的块茎中，还原糖的增加幅度最小（10.2%），而非还原糖的减少幅度最大（-12.75%）。较高剂量的辐射会降低抗坏血酸的含量。尽管延迟辐射会导致抗坏血酸损失较少（8.5%），但会导致发芽、失重、硬度和糖含量等方面发生更大的代谢变化。此外，延迟辐射的时间越长，抑制发芽所需的辐射剂量就越高。
