外源ABA对低温胁迫下烤烟幼苗生理指标的影响
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S573

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广西壮族自治区科技厅重点研发计划项目(桂科AB16380160);广西壮族自治区烟草专卖局(公司)项目(桂烟(科[2013]4号(2013-17));广西中烟工业有限责任公司科技项目(2020450000340009)


Effects of Exogenous ABA on Physiology Index of Tobacco Seedling under Cold Stress
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    摘要:

    探讨脱落酸(ABA)对烤烟幼苗抗寒性的影响,以期为提高烤烟苗期抗寒性及抗寒栽培提供理论依据。以云烟87为材料,于15℃低温胁迫下叶面喷施ABA处理,测定烤烟幼苗叶片可溶性蛋白、可溶性糖、脯氨酸和丙二醛含量及抗氧化酶(SOD、POD和CAT)的活性、叶绿素含量及叶绿素荧光参数等生理指标,分析烤烟幼苗的抗寒性。低温胁迫与对照相比,喷施ABA可显著提高烤烟幼苗可溶性蛋白、可溶性糖和脯氨酸含量,减缓丙二醛(MDA)的积累,同时抗氧化酶(SOD、POD和CAT)的活性显著提高;有效减缓叶绿素降解速率,减轻低温对烤烟光合作用的影响;ABA处理提高了烤烟幼苗根系活力,整株生物量维持在较高水平。低温胁迫下叶面喷施ABA可提高烤烟幼苗的抗寒能力。

    Abstract:

    In this experiment, the effect of ABA on the cold resistance of tobacco seedlings was investigated to provide a theoretical basis for improving cold-resistance during seeding stage and cold-resistance breeding. YY 87 was selected as the material, ABA was sprayed on the leaves under 15℃ temperature of cold stress. The physiological indexes, including content of soluble protein, soluble sugar, proline, malondialdehyde(MDA), SOD, POD, CAT activity, content of chlorophyll and chlorophyll fluorescence parameters were detected to analysis the cold resistance of tobacco seedling. Spraying ABA under cold stress conditions significantly increased the contents of soluble protein,soluble sugar, and proline compared to the control. It also slowed down the accumulation of MDA content, while increase the activity of SOD, POD, CAT significantly, stop the decrease of the content of chlorophyll effectively, which would reduce the influence of low temperature on photosynthesis of plant leaves. The root activity was also improved, which result in maintaining the biomass accumulation in high level of tobacco seedlings. Spraying the ABA on tobacco under low temperature can effectively raise the ability of cold resistance of tobacco seedling.

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梁琼月,潘明君,尹永强,韦建玉,沈方科,贾海江,唐新莲.外源ABA对低温胁迫下烤烟幼苗生理指标的影响[J].东北农业科学,2023,48(5):51-55.

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  • 收稿日期:2020-04-30
  • 在线发布日期: 2024-10-25
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