等离子体对干旱胁迫下小麦种子萌发的生物学效应

用80～240W射频等离子体处理小麦种子,在聚乙二醇(PEG-6000)模拟干旱胁迫条件下,研究了不同功率等离子体对小麦幼苗生长及抗旱性的影响。试验结果表明:不同功率的等离子体处理对干旱胁迫条件下小麦幼苗生长的影响效果不同,80～200W处理对幼苗生长有不同程度的促进作用,根数、根长、株高、幼苗干重和根冠比各项指标均比对照有不同程度的提高,而240W处理对小麦幼苗生长产生了抑制效应。其中160W处理小麦种子在干旱胁迫下小麦幼苗根数、根长及干重分别比对照增加14.29%、16.94%和9.76%;丙二醛(MDA)含量及质膜透性比对照明显降低,防止或降低了膜质过氧化作用对膜的伤害;SOD、POD活性及脯氨酸含量均比对照高,表明保护性酶系统增强,一定程度上缓减了干旱胁迫对小麦幼苗的伤害,提高了其抗旱性。

Physiological Effects of Plasma on Seed Germination of Winter Wheat under Drought Stress

The wheat seeds were treated by different intensities （80-240 W） plasma,under the model drought resistance by using of PEG-6000.The effects of the different intensities of plasma on wheat seedlings were studied.The results showed that effects of different power plasma treatments on seed germination were different.The lateral roots,plant height,root length,dry weight and ratio of root to shoot of five treatments （80-200 W） were higher than the control.But the seed germination was restrained by plasma treatment at 240 W.In the treatment at 160 W on wheat seedlings,the lateral roots,plant height and root length were increased by 14.29%,16.94% and 9.76%,respectively,as compared with the control.The content of the MDA and membrane lipid peroxidation were significantly decreased,which prevented and decreased the damage of the oxidation on cell membrane.The contents of the SOD,POD and proline were higher than the control under the treatment of the plasma.It indicated that the treatment at 160 W could protect the activities of the enzyme system and retard the damage,and improve the drought resistance of wheat seedlings.