XU Jian,YU Hai-lin,WANG Yu-xian,et al.Physiological Response of Maize to PEG-6000 Stress at Seedling Stage[J].HEILONGJIANG AGRICULTURAL SCIENCES,2021,(08):8-11.[doi:10.11942/j.issn1002-2767.2021.08.0008]
苗期玉米对PEG-6000胁迫的生理响应
- Title:
- Physiological Response of Maize to PEG-6000 Stress at Seedling Stage
- Keywords:
- maize; drought resistance; physiological index; PEG-6000
- 文献标志码:
- A
- 摘要:
- 为探讨玉米苗期的抗旱性，针对玉米抗旱种质资源的筛选提供可借鉴的指标及方法，以3个不同生态类型的玉米品种为试验材料，采用盆栽法在苗期对玉米的抗旱特性生理指标进行了测定和分析。结果表明：干旱胁迫下3个玉米幼苗的SOD、POD和CAT活性较对照显著提高，在A3(10%PEG-6000)处理下活性达到最高；叶片脯氨酸含量有所增加，并在浓度为A3(10%PEG-6000)时脯氨酸的积累效果最好；干旱胁迫处理下3个品种与对照的叶绿素、叶绿素初始荧光数值(F0)、光能化学效率值(Fv/Fm)差异显著。综上所述，3个玉米品种抗旱性由强至弱顺序为嫩单23>绥玉23>合玉29。
- Abstract:
- In order to explore the drought resistance of maize at seedling stage and provide reference indexes and methods for screening drought resistant germplasm resources of maize,the physiological indexes of drought resistance characteristics of maize at seedling stage were measured and analyzed by pot culture method with three maize varieties of different ecological types as experimental materials.The results showed that the activities of SOD,POD and CAT of three maize seedlings under drought stress were significantly higher than those of the control,and reached the highest under A3(10% PEG-6000)treatment. The content of proline in leaves increased,and the accumulation effect of proline was the best at the concentration of A3(10% PEG-6000).Under drought stress,there were significant differences in chlorophyll,chlorophyll initial fluorescence (F0) and light chemical efficiency (Fv/Fm) between the three varieties and the control under drought stress.In conclusion,the order of drought resistance of three maize varieties from strong to weak is Nendan 23>Suiyu 23>Heyu 29.
参考文献/References:
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备注/Memo
收稿日期：2021-05-01