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目的:了解药用菊花对水淹胁迫的反应,筛选可靠的评价耐涝性指标。方法:以小白菊、长瓣菊、红心菊为研究对象,进行淹水处理,分析淹水胁迫对其生理生化指标的影响。结果:随淹水胁迫处理加深,各参试药用菊花类型总叶绿素含量、叶片相对含水量呈下降趋势;丙二醛(MDA)、还原型谷胱甘肽(GSH)、可溶性糖含量总体上随胁迫程度的加深而升高;红心菊过氧化氢酶(CAT)含量变化趋势为先升高后下降,小白菊及长瓣菊CAT含量变化趋势为先降低后升高再降低;过氧化物酶(POD)活性总体上呈现先增后降再升高的变化趋势;淹水4 d解除胁迫,3 d后各生理生化指标均不能恢复到对照水平。结论:淹水4 d对参试药用菊花类型产生严重伤害;3种类型药用菊花耐涝性为红心菊>小白菊>长瓣菊;MDA,CAT的变化趋势与耐涝性表现相符,可作为药用白菊花耐涝性评价的可靠指标。
Objective: To understand the response of medicinal chrysanthemum to flooding stress and to screen reliable indicators of waterlogging tolerance. Methods: The research aimed to study the effects of submerged water treatment on its physiological and biochemical indexes. Results: With the deepening of flooding stress, the total chlorophyll content and relative water content of the medicinal chrysanthemum varieties showed a decreasing trend. The contents of malondialdehyde (MDA), reduced glutathione (GSH) and soluble sugar The content of CAT in Cinnabar increased firstly and then decreased, the CAT content in Attenuata chinensis and Lonicera japonica decreased first and then increased and then decreased; the content of peroxides The activity of POD increased first, then decreased then increased again. After flooding for 4 days, all the physiological and biochemical indexes could not recover to the control level after 3 days. Conclusion: The waterlogging for 4 days caused serious damage to the medicinal chrysanthemum. The waterlogging tolerance of the three types of medicinal chrysanthemum was as follows: It can be used as a reliable index to evaluate the waterlogging resistance of medicinal white chrysanthemum.