冷等离子体处理对紫花苜蓿种子萌发和幼苗MDA含量的影响

Effects of CPT on Seed Germination and Seedling MDA Content of Alfalfa

运用冷等离子体种子处理技术(CPT)对不同品种紫花苜蓿种子进行非电离幅射处理,研究该技术对苜蓿种子萌发机制的影响。利用不同剂量的冷等离子体处理苜蓿种子,经过室内发芽试验,研究苜蓿的发芽势、发芽率、发芽指数、活力指数以及丙二醛含量。结果表明,经0~310 W不同剂量冷等离子体处理后,种子各发芽指标及丙二醛(MDA)含量均有明显变化。与对照相比,处理后苜蓿种子更具有发芽优势。说明该技术对苜蓿种子室内发芽具有重要影响,在生产上具有使用和推广价值。冷等离子体处理陇东苜蓿的最佳供电功率为70 W,处理后种子发芽率(GR)、发芽势(GP)、发芽指数(GI)、活力指数(VI)分别提高5.85%、7.19%、10.83%、2.29%,幼苗丙二醛(MDA)含量降低2.33%;处理甘农三号苜蓿的最佳处理功率为100 W,处理后种子GR、GP、GI、VI分别提高0.56%、7.48%、16.48%、23.21%,幼苗MDA含量降低21.91%;处理甘农七号苜蓿的最佳功率为190 W,处理后种子GR、GP、GI、VI分别提高1.68%、13.75%、14.01%、24.97%,幼苗MDA含量降低35.71%。

The effects of cold plasma seed treatment(CPT)on seed germination mechanism of alfalfa were studied.The germination potential,germination rate,germination index,vigor index and malondialdehyde content of alfalfa were studied by using cold plasma treatment with different doses.The results showed that the germination indexes and malondialdehyde(MDA)contents of seeds were significantly changed after cold plasma treatment at different doses from 0 to 310 W.Compared with the control,the treated alfalfa seed had the advantage of germination.It showed that this technique had important influence on indoor germination of alfalfa seed and had application and popularization value in production.When the optimal power supply of cold plasma treatment of Longdong alfalfa was 70 W,the seed germination rate(GR),germination potential(GP),germination index(GI)and activity index(VI)were increased by 5.85%,7.19%,10.83%and 2.29%respectively,and the malondialdehyde(MDA)content of seedlings was reduced by 2.33%.The optimal treatment power of Gannong No.3 was 100 W.After treatment,the GR,GP,GI and VI of seeds were increased by 0.56%,7.48%,16.48%and 23.21%respectively,and MDA content of seedlings was decreased by 21.91%.The optimal power of Gannong No.7 was 190 W,and the GR,GP,GI and VI of seeds were increased by 1.68%,13.75%,14.01%and 24.97%,respectively,while the MDA content of seedlings was reduced by 35.71%.