摘要
为探明盐胁迫对羽衣甘蓝种子萌发特性的影响,明确种子萌发期对盐胁迫的耐受能力,本试验以羽衣甘蓝种子为试验材料,研究不同浓度的NaCL(0、40、80、120、160、200mmol/l)和NaHCO3(0、20、30、40、50、60mmol/l)对种子萌发胁迫的作用。结果表明:1、2种盐胁迫处理下,羽衣甘蓝种子的发芽率、发芽势、发芽指数和活力指数等指标均随着盐浓度的升高逐渐降低;2、高浓度的NaHCO3盐溶液对羽衣甘蓝种子的胚根、胚芽的生长抑制较NaCL盐溶液显著;3、2种盐均存在不同程度的种子萌发抑制,不同种类盐分对羽衣甘蓝种子萌发抑制表现为NaCL<NaHCO3;4、羽衣甘蓝种子萌发阶段对NaCL和NaHCO3二种单盐胁迫的耐盐适宜浓度分别为76.46mmol/l、26.57mmol/l,耐盐半致死浓度分别为130.80mmol/l、38.77mmol/l,耐盐极限浓度分别为217.76mmol/l、58.28mmol/l。
In order to investigate the effects of salt stress on the germination characteristics of ornamental kale seeds,the tolerance to salt stress during seed germination was determined.In this study,ornamental kale seeds were used as experimental materials to study the effects of different concentrations of NaCL(0,40,80,120,160,200 mmol/l)and NaHCO3(0,20,30,40,50,60 mmol/l)on seed germination stress.The results showed that:1.2 salt stress treatments,the germination rate,germination potential,germination index and vigor index of ornamental kale seeds decreased with the increase of salt concentration.2.High concentration of NaHCO3 salt solution significantly inhibited the growth of ornamental kale seeds radicle and germ compared with NaCL salt solution.3.The two salts had different degrees of inhibition on seed germination.The inhibition of different kinds of salts on seed germination of ornamental kale seeds was NaCL<NaHCO3.4.In the germination stage of ornamental kale seeds,the appropriate salt tolerance concentrations of NaCL and NaHCO3 two single salt stress were 76.46 mmol/l,26.57 mmol/l,the salt tolerance half-lethal concentrations were 130.80 mmol/l,38.77 mmol/l,and the salt tolerance limit concentrations were 217.76 mmol/l,58.28 mmol/l,respectively.
作者
彭妞
王琳
PENG Niu;WANG Lin(College of Plant Science,Tarim University Alar,Xinjiang 843300)
出处
《现代农业研究》
2020年第5期61-65,共5页
Modern Agriculture Research
关键词
盐胁迫
羽衣甘蓝
种子萌发
salt stress
ornamental kale
seed germination
