TIAN Xin,ZHONG Cheng,LIU Shan.Effects of Exogenous H2O2 on Vitrification and Antioxidant System of Lilium henryi Baker Test-tube Seedlings[J].HEILONGJIANG AGRICULTURAL SCIENCES,2021,(04):17-24.[doi:10.11942/j.issn1002-2767.2021.04.0017]
外源H2O2对湖北百合试管苗玻璃化及抗氧化系统的影响
- Title:
- Effects of Exogenous H2O2 on Vitrification and Antioxidant System of Lilium henryi Baker Test-tube Seedlings
- Keywords:
- Lilium henryi Baker; vitrification; exogenous H2O2; stomata
- 文献标志码:
- A
- 摘要:
- 为控制湖北百合离体保存及试管苗玻璃化,以贵州省凯里市丁扒山的湖北百合为材料,通过不同配方培养基和H2O2浓度处理诱导湖北百合玻璃化发生,并测定其生理指标变化。结果表明:不同培养基配方对湖北百合玻璃化发生没有影响。外源H2O2会诱导湖北百合试管苗的玻璃化,随着外源H2O2浓度的增加玻璃化程度逐渐明显。在不同浓度外源H2O2处理下,湖北百合玻璃化苗的玻璃化率、POD活性、MDA含量随外源H2O2浓度的增加呈现上升趋势;湖北百合玻璃化苗的生长量、SOD活性、CAT活性随外源H2O2浓度的增加呈现下降趋势。湖北百合玻璃化苗的气孔保卫细胞变形,气孔下陷明显,不同浓度处理间下陷程度没有显著差异,凹陷率随着外源H2O2浓度增加呈上升趋势;气孔张开率随外源H2O2浓度增加不断下降,气孔闭合率随外源H2O2浓度增加呈先下降后上升的趋势,对照组的气孔开度显著高于中高浓度处理,3个低中高浓度外源H2O2处理组之间的气孔开度没有显著差异;高浓度处理气孔密度显著低于对照组,但低中浓度与对照组气孔密度没有显著差异。
- Abstract:
- In order to control the preservation and vitrification of Lilium henryi Baker seedlings in vitro,the vitrification of Lilium henryi Baker seedlings in Dingpashan,Kaili City,Guizhou Province was induced by different medium and H2O2 concentration,and the changes of its physiological indexes were measured.The results showed that the vitrification of Lilium henryi Baker was not affected by different medium formulas.Exogenous H2O2 could induce the vitrification of lily in vitro,and the vitrification degree was gradually obvious with the increase of exogenous H2O2 concentration.Under different concentrations of exogenous H2O2,the vitrification rate,POD activity and MDA content of Lilium henryi Baker vitrification seedlings increased with the increase of exogenous H2O2 concentration.The growth,SOD activity and CAT activity of lily vitrified seedlings decreased with the increase of exogenous H2O2 concentration.The stomatal guard cells of Lilium henryi Baker vitrified seedlings were deformed,and the stomatal subsidence was obvious.There was no significant difference in the degree of subsidence among different concentrations,and the sag rate increased with the increase of exogenous H2O2 concentration.The stomatal opening rate decreased with the increase of exogenous H2O2 concentration,and the stomatal closure rate decreased first and then increased with the increase of exogenous H2O2 concentration.The stomatal opening rate of the control group was significantly higher than that of the medium-high concentration treatment,and there was no significant difference in the stomatal opening among the three low-medium-high concentration exogenous H2O2 treatment groups.Stomatal density of high concentration treatment was significantly lower than that of control group,but there was no significant difference between low and medium concentration treatment and control group.
参考文献/References:
[1]中国植物志编纂委员会.中国植物志(第十四卷?百合科)[M].北京:科学出版社,1980.
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备注/Memo
收稿日期:2020-11-30