脱落酸处理对草莓幼苗抗冷性的影响
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S663

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吉林省教育厅“十一五”科学技术研究课题(2010-220)


Effects of Abscisic Acid on Chilling Tolerance of Strawberry Seedlings
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    摘要:

    以草莓为材料,利用不同浓度的脱落酸(ABA)浸根处理和幼苗喷施处理,测定分析处理后草莓幼苗的各项生理生化指标数值变化,以探讨脱落酸对草莓幼苗抗冷性的影响。结果表明:经过ABA处理的草莓幼苗呼吸速率、根活力、超氧化物歧化酶(SOD)、过氧化物酶(POD)和过氧化氢酶(CAT)活性均高于对照,叶绿素、可溶性糖、可溶性蛋白、脯氨酸(Pro)含量均高于对照,丙二醛(MDA)含量和电导率均低于对照。当ABA浓度为150ug·L-1时,草莓幼苗呼吸速率、根活力、SOD、POD和CAT活性达到最高值,叶绿素、可溶性糖、可溶性蛋白、脯氨酸(Pro)含量达到最大值,丙二醛(MDA)含量和电导率达到最低值。两种处理方式比较,浸根处理有利于提高低温胁迫苗的根活力,叶面喷施处理有利于提高低温胁迫苗的呼吸速率和叶绿素含量,其他指标无明显差异。

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    The strawberry was used as experimental material and its roots were soaked or leaves drenched withdifferent concentrations of abscisic acid(ABA). The physiological and biochemical indexes were determined to dis-cuss effect of ABA on chilling tolerance of strawberry seedlings. The results showed that respiration rate, root activi-ty, superoxide dismutase(SOD), peroxidase(POD) and catalase(CAT) of strawberry seedlings increased by ABAtreatment. The contents of chlorophyll, soluble sugar, soluble protein, proline(Pro) contents were higher than thecontrol, whereas malondialdehyde(MDA) content and electrical conductivity were lower than the control. When theABA concentration was 150ug·L-1, the strawberry seedlings’ respiration rate, root activity, SOD, POD and CAT ac-tivity reached the highest, and chlorophyll, soluble sugar, soluble protein, proline(Pro) contents reached maximum,but malondialdehyde(MDA) content and conductivity reached minimum. Comparison of two methods, root soakingtreatment improved low temperature stress tolerance of root activity of seedling. Foliar treatment improved low tem-perature stress tolerance of the respiration rate and chlorophyll content of seedling. The others showed no significantdifference.

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鲍智娟.脱落酸处理对草莓幼苗抗冷性的影响[J].东北农业科学,2015,40(5):85-89.

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  • 收稿日期:2015-05-21
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  • 在线发布日期: 2024-12-06
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