干旱区生态环境知识资源中心(Arid): 外源脱落酸对红砂叶片渗透调节物质含量及抗氧化酶活性的影响

Arid

	外源脱落酸对红砂叶片渗透调节物质含量及抗氧化酶活性的影响
其他题名	Effects of exogenous abscisic acid on the content of osmotic adjustment substances and antioxidant enzyme activity in the leaves of Reaumuria soongorica
	后有丽; 苏世平; 李毅; 种培芳; 马鹏图; 魏斌
来源期刊	草业科学
ISSN	1001-0629
出版年	2020
卷号	37 期号:2 页码:245-255
中文摘要	以大田环境中多年龄植物红砂(Reamuria soongorica)植株为材料,采用室外试验研究了自然干旱下喷施2、4、 6和8 mg·L~(-1)的外源脱落酸(abscisic acid, ABA)对红砂叶片渗透调节物质含量及抗氧化酶活性的影响。结果表明,外源ABA能降低红砂叶片中可溶性糖(soluble sugar, SS)、游离脯氨酸(free proline, Pro)和可溶性蛋白(soluble protein,SP)含量,提高超氧化物歧化酶(superoxide dismutase, SOD)、过氧化物酶(peroxidase, POD)和过氧化氢酶(catalase,CAT)活性;随着ABA浓度的增加,ABA作用效应先增强后减弱。其中,6 mg·L~(-1)的外源ABA作用效应最大,与处理前相比,该浓度下红砂叶片中SS、Pro、SP含量分别显著下降35.75%、90.08%、16.66%, SOD活性显著上升28.94%,POD活性为处理前的1.35倍,CAT活性显著上升84.46%。因此,喷施外源ABA可缓解干旱胁迫对红砂植株的伤害,以喷施6 mg·L~(-1)的外源ABA效果最佳。在今后荒漠区红砂种群的保育中可喷施6 mg·L~(-1)的外源ABA缓解干旱胁迫对植株的伤害。
英文摘要	An outdoor experiment was conducted to investigate the effects of exogenous abscisic acid(ABA)on the contents of osmotic adjustment substances and antioxidant enzymatic activity on the leaves of the perennial, Reaumuria soongorica.Concentrations of abscisic acid(ABA)at 2, 4, 6, and 8 mg·L~(-1) were utilized, all under natural field environmental drought conditions.The results revealed that the content of soluble sugar(SS), free proline(Pro), and soluble protein(SP)in the leaves of R.soongorica were reduced by exogenous ABA application, and the activities of superoxide dismutase(SOD),peroxidase(POD)and catalase(CAT)were increased with sprayed ABA.With increasing ABA concentration, it was observed that the above functions initially increased, but then tapered off at higher ABA concentrations.When comparing concentrations to function, the function of exogenous ABA at 6 mg·L~(-1) was the greatest.Before spraying osmotic adjustment substances as well as antioxidant enzymes with exogenous ABA, the content of SS, Pro, and SP in the leaves of R.soongorica significantly decreased by 35.75%, 90.08%, and 16.66% at 6 mg·L~(-1) of exogenous ABA.Additionally, the activity of SOD significantly increased by 28.94%, with the activity of POD being 1.35 times higher.The resultant activity of CAT significantly increased by 84.46%.In conclusion, damage to R.soongorica caused by drought stress was alleviated by the application of exogenous ABA on the leaves.Spraying at a concentration of 6 mg·L~(-1) of exogenous ABA obtained the most optimal results.These results show that spraying exogenous ABA at 6 mg·L~(-1) could alleviate the damage of drought stress on plants for the conservation of the R.soongorica population in desert areas.
中文关键词	干旱胁迫 ; 红砂 ; 外源脱落酸 ; 渗透调节物质 ; 抗氧化酶
英文关键词	drought stress Reaumuria soongorica exogenous ABA osmotic adjustment substances antioxidant enzymes
语种	中文
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:6665644
来源机构	甘肃农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/316051
作者单位	甘肃农业大学林学院, 兰州, 甘肃 730070, 中国
推荐引用方式 GB/T 7714	后有丽,苏世平,李毅,等. 外源脱落酸对红砂叶片渗透调节物质含量及抗氧化酶活性的影响[J]. 甘肃农业大学,2020,37(2):245-255.
APA	后有丽,苏世平,李毅,种培芳,马鹏图,&魏斌.(2020).外源脱落酸对红砂叶片渗透调节物质含量及抗氧化酶活性的影响.草业科学,37(2),245-255.
MLA	后有丽,et al."外源脱落酸对红砂叶片渗透调节物质含量及抗氧化酶活性的影响".草业科学 37.2(2020):245-255.