立枯丝核菌对高粱幼苗活性氧及抗氧化酶活性的影响
Q945.78%S435.14; 以立枯丝核菌AG1-IA接种'龙杂19号'高粱幼苗,通过盆栽试验在不同侵染时间观测分析高粱幼苗生长及生理代谢相关指标,揭示立枯丝核菌侵染对高粱生长、渗透调节物质及其抗氧化酶活性的影响机理.结果表明,(1)高粱幼苗株高、根长、地上(茎和叶片)鲜质量和干质量、地下(根)鲜质量和干质量均随接种时间延长呈下降趋势,且在接菌72 h时较对照依次分别显著下降了 41.0%、29.2%、50.0%、50.0%、53.3%和50.0%.(2)幼苗叶片叶绿素a含量在接菌72 h时较对照显著下降45.3%,叶片PSⅡ最大光化学效率(Fv/Fm)值随接菌时间增加...
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| Published in | 西北植物学报 Vol. 42; no. 5; pp. 796 - 802 |
|---|---|
| Main Authors | , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
黑龙江八一农垦大学农学院,黑龙江大庆163319%黑龙江八一农垦大学农学院,黑龙江大庆163319%河南省农业科学院长垣分院,河南长垣453400
2022
河南省农业科学院长垣分院,河南长垣453400 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1000-4025 |
| DOI | 10.7606/j.issn.1000-4025.2022.05.0796 |
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| Abstract | Q945.78%S435.14; 以立枯丝核菌AG1-IA接种'龙杂19号'高粱幼苗,通过盆栽试验在不同侵染时间观测分析高粱幼苗生长及生理代谢相关指标,揭示立枯丝核菌侵染对高粱生长、渗透调节物质及其抗氧化酶活性的影响机理.结果表明,(1)高粱幼苗株高、根长、地上(茎和叶片)鲜质量和干质量、地下(根)鲜质量和干质量均随接种时间延长呈下降趋势,且在接菌72 h时较对照依次分别显著下降了 41.0%、29.2%、50.0%、50.0%、53.3%和50.0%.(2)幼苗叶片叶绿素a含量在接菌72 h时较对照显著下降45.3%,叶片PSⅡ最大光化学效率(Fv/Fm)值随接菌时间增加而逐渐下降.(3)幼苗叶片内MDA、O-2和H2O2含量随接菌时间增加均呈逐渐上升趋势,在接菌72 h时较对照分别显著上升244.6%、140.4%和137.0%;叶片SOD、POD、APX和CAT的活性在接菌后变化趋势不尽相同,但在接菌72 h时较对照分别显著上升了 16.5%、60.3%、50.0%和36.5%.(4)幼苗叶片可溶性蛋白和可溶性糖含量随接菌时间增加均呈逐渐上升趋势,并在接菌24~72 h增幅均达到显著水平.研究发现,接种立枯丝核菌可致高粱幼苗植株产生病斑,体内活性氧过量积累,膜质发生显著氧化损伤;侵染前期高粱植株主要以积累更多的渗透调节物质来抵御立枯丝核菌带来的伤害,侵染后期随植株受到伤害加重,同时诱导植株抗氧化酶类活性显著增强,以维持高粱体内活性氧代谢稳态平衡,减少植物膜进一步氧化损伤. |
|---|---|
| AbstractList | Q945.78%S435.14; 以立枯丝核菌AG1-IA接种'龙杂19号'高粱幼苗,通过盆栽试验在不同侵染时间观测分析高粱幼苗生长及生理代谢相关指标,揭示立枯丝核菌侵染对高粱生长、渗透调节物质及其抗氧化酶活性的影响机理.结果表明,(1)高粱幼苗株高、根长、地上(茎和叶片)鲜质量和干质量、地下(根)鲜质量和干质量均随接种时间延长呈下降趋势,且在接菌72 h时较对照依次分别显著下降了 41.0%、29.2%、50.0%、50.0%、53.3%和50.0%.(2)幼苗叶片叶绿素a含量在接菌72 h时较对照显著下降45.3%,叶片PSⅡ最大光化学效率(Fv/Fm)值随接菌时间增加而逐渐下降.(3)幼苗叶片内MDA、O-2和H2O2含量随接菌时间增加均呈逐渐上升趋势,在接菌72 h时较对照分别显著上升244.6%、140.4%和137.0%;叶片SOD、POD、APX和CAT的活性在接菌后变化趋势不尽相同,但在接菌72 h时较对照分别显著上升了 16.5%、60.3%、50.0%和36.5%.(4)幼苗叶片可溶性蛋白和可溶性糖含量随接菌时间增加均呈逐渐上升趋势,并在接菌24~72 h增幅均达到显著水平.研究发现,接种立枯丝核菌可致高粱幼苗植株产生病斑,体内活性氧过量积累,膜质发生显著氧化损伤;侵染前期高粱植株主要以积累更多的渗透调节物质来抵御立枯丝核菌带来的伤害,侵染后期随植株受到伤害加重,同时诱导植株抗氧化酶类活性显著增强,以维持高粱体内活性氧代谢稳态平衡,减少植物膜进一步氧化损伤. |
| Author | 赵长江 吴亚滨 郭怀刚 |
| AuthorAffiliation | 河南省农业科学院长垣分院,河南长垣453400;黑龙江八一农垦大学农学院,黑龙江大庆163319%黑龙江八一农垦大学农学院,黑龙江大庆163319%河南省农业科学院长垣分院,河南长垣453400 |
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