不同含水量对薏苡种子活力的影响

Effect of Different Moisture Content on Seed Vigor of Coix lacryma-jobi L

以辽薏苡1号种子为试验材料,通过人工老化的方法,研究不同含水量对薏苡种子活力的影响。结果表明,薏苡种子的含水量由16.94%降至14.89%,种子活力保持在较高水平。经人工老化处理后,种子含水量在14.89%时,其发芽率、发芽指数、可溶性蛋白及可溶性糖的含量均达到最大值,淀粉酶、POD酶活性也处于较高水平;而种子浸出液的电导率、丙二醛的含量处于最低水平,脱氢酶活性相对下降最少。因此,在对薏苡种子进行长时期保存时,适当降低种子的含水量有利于其保持较高的活力。

With artificial aging methods,the effects of different moisture contents on seed vigor of Coix lacryma-jobi L.,Liao Coix No.1 were studied.The results showed that the seed vigor would keep at a relatively higher level when the moisture content of Liao Coix No.1 seeds decreased from 16.94% to 14.89%.After artificial aging,the germination rate,germination index,the contents of soluble protein and soluble sugar of Liao Coix No.1 seeds with 14.89% moisture content entirely reached the maximum value.Meanwhile,the activities of amylase and POD were also at the relatively higher levels.On the contrary,the electric conductivity and the MDA content of Liao Coix No.1 seeds kept at the lowest level at the same condition of moisture content,and the decrease of dehydrogenase activity was the least as well.Based on the above results,it could be inferred that for the long-term preservation of Coix lacryma-jobi L.seeds to keep seeds at a higher vigor,an optimal moisture content was one of the most important factors.