电子辐照对小麦生理生化品质的影响

Effects of Electron Beam Irradiation on Physiological and Biochemical Properties of Stored Wheat

本文研究了不同剂量电子辐照对小麦主要成分、种子活力与萌发特性、膜渗透和微生物特性等主要生理生化指标的影响。结果表明,经0-5KGy辐照后,小麦基本营养成分没有太大变化,但使脂肪水解,脂肪酸值大幅增加,α-淀粉酶活性迅速降低。经5KGy剂量辐照的比未经辐照的小麦其α-淀粉酶活性下降了41%。对实验结果进行相关性分析和回归分析表明,辐照剂量与种子活力和萌发特性表现出了一定程度的正相关性,其中种子活力指数与辐照剂量的差异表现出高显著性。此外,微生物学实验表明,辐照还有明显的抑菌作用。当辐照剂量达4KGy时,菌落总数下降了一个数量级,当辐照剂量达1KGy时,青霉属和根霉属均检测不出。

Effects of electron beam irradiation with various doses on wheat physiological and biochemical properties of wheat, such as the main components, seed vigor and germination character, membrane permeation and respiration, microbial characteristics, etc., were studied in this paper. The result demonstrated that the basic nutritional composition of wheat irradiated with radiation doses of 0-had not changed while the fatty acid value increased greatly due to fat hydrolysis, a-Amylase activity of the stored wheat irradiated with 5KGy decreases rapidly, which was 41% lower than that Correlation and regression analysis showed that there was positive relativity between irradiation dose and seed vigor and genrfination. Besides, the colony count of the stored wheat irradiated with 4 KGy doses was one order of magnitude smaller than that without irradiation. No Penicillium and Rhizopus were detected when the doses was above 1 KGy.