Abstract:

To investigate the effect of cold plasma treatment on salt tolerance of oats under salt stress， the oat seeds of Bayou 14 were used as experimental materials， and different durations （30 s， 15 s×2） of 5 and 6 kV were applied to the oat seeds at different times cold plasma treatment was used to determine the germination of oat seeds， seedling growth， and physiological indicators under different concentrations of NaCl solution （0.5， 1.0， 1.5 g·L^-1） stress. The results showed that cold plasma can significantly improve the hydrophilicity of oat seed coat and the water absorption rate of oat seeds， and could alleviate the effects of salt stress on oat plant height and root length. Based on the comprehensive evaluation and analysis of oat salt resistance using membership functions， it was found that the cold plasma treatment parameters were 5 kV， 30 s， and 6 kV， 15 s×2， respectively， the salt resistance of oats under stress concentration of 1.5 g·L^-1 was increased. Moreover， as the stress intensity increases， the alleviating effect of cold plasma treatment on salt stress gradually increases under 5 kV and 30 s parameters.

Key words: oat, salt stress, cold plasma, seed germination, seedling growth

摘要：

为探究冷等离子体处理对盐胁迫下燕麦耐盐性的影响，以坝莜14号燕麦种子为试验材料，选用5和6 kV的电压对燕麦种子进行不同时长（30 s、15 s×2）的冷等离子体处理，测定不同浓度的NaCl 溶液(0.5、1.0、1.5 g·L^-1)胁迫下燕麦种子萌发和幼苗生长及生理指标。结果发现，冷等离子体可以显著提高燕麦种皮亲水性及燕麦种子的吸水率，缓解盐胁迫对燕麦株高和根长的影响。基于隶属函数对燕麦抗盐能力进行综合评价分析发现，冷等离子体处理参数为5 kV、30 s和6 kV、15 s×2时，1.5 g·L^-1浓度胁迫下燕麦的抗盐能力提高，且随着胁迫强度的增加，5 kV、30 s参数下，冷等离子体处理对盐胁迫的缓解作用效果逐渐增强。

关键词: 燕麦, 盐胁迫, 冷等离子体, 种子萌发, 幼苗生长