XU Qian,GUO Shangjing,WEI Huitian,et al.Effects of Exogenous BABA on Growth and Physiological Characteristics of Wheat Seedlings in Orychophragmus violaceus Under NaCl Stress[J].Northern Horticulture,2020,44(12):75-81.[doi:10.11937/bfyy.20193139]
外源BABA对NaCl胁迫下二月兰幼苗生长和生理特性的影响
- Title:
- Effects of Exogenous BABA on Growth and Physiological Characteristics of Wheat Seedlings in Orychophragmus violaceus Under NaCl Stress
- Keywords:
- Orychophragmus violaceus; β-aminobutyric acid; NaCl stress
- 文献标志码:
- A
- 摘要:
- 以二月兰为试材，研究不同β-氨基丁酸（BABA)浓度（0.25、0.50、1.00、2.00 mmol?L-1）对NaCl胁迫下二月兰幼苗生长指标、质膜透性、脯氨酸含量、抗氧化酶活性以及叶绿素含量的影响。结果表明：NaCl胁迫下，随着BABA处理浓度的增加，二月兰幼苗的相对电导率呈现先下降后上升的趋势，生物量、根系生长指标、脯氨酸含量、抗氧化酶活性以及叶绿素含量均呈现先上升后下降的趋势。相对电导率在0.25 mmol?L-1时降幅达最大，脯氨酸含量和叶绿素含量均在0.50 mmol?L-1时增幅达最大。过氧化物酶（POD）活性和过氧化氢酶（CAT）活性均在0.25 mmol?L-1变化最显著，达到最大值，超氧化物歧化酶（SOD）活性在0.50 mmol?L-1时达到最大值。表明0.25、0.50 mmol?L-1浓度的BABA处理能够有效缓解NaCl胁迫对二月兰幼苗的伤害。
- Abstract:
- Orychophragmus violaceus seedlings were subjected,the effects of different concentrations of BABA (0.25,0.50,1.00,2.00 mmol?L-1) on the index of seedling growth,plasma membrane permeability,proline content,antioxidant enzyme activity and chlorophyll content of Orychophragmus violaceus seedlings were studied under NaCl stress.The results showed that the relative conductivity of Orychophragmus violaceus seeding increased firstly and then declined,the biomass,root growth index,proline content,antioxidant enzyme activity and chlorophyll content of Orychophragmus violaceus seedlings declined firstly and then increased with the increasing BABA concentration under NaCl stress.When the BABA concentration was 0.25 mmol?L-1,the relative conductivity showed the biggest decline.When the BABA concentration was 0.50 mmol?L-1,proline content and chlorophyll content revealed the largest increase.The activity of peroxidase and catalase was significantly improved at 0.25 mmol?L-1,reaching the maximum value.The activity of superoxide dismutase reaching the maximum value at 0.50 mmol?L-1.It was suggested that 0.25,0.50 mmol?L-1 BABA treatment could effectively alleviate the harm of Orychophragmus violaceus seedlings under NaCl stress．
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备注/Memo
第一作者简介：徐倩（1988-），女，硕士研究生，农艺师，研究方向为园林植物光合生理。E-mail：281503466@qq.com.责任作者：郭尚敬（1970-），男，博士，教授，研究方向为光合作用分子调控。E-mail：lcguoshangjing@163.com.基金项目：山东省自然科学基金资助项目（ZR2017MC009）。收稿日期：2019-11-12