纳米硅肥对远东芨芨草幼苗模拟抗旱的影响  

Influence of nano-silicon fertilizer on osmotic stress in Achnatherumextremiorientale

作　　者：龚束芳 刘阳 速馨逸 姜童童 王金刚 GONG Shufang;LIU Yang;SU Xinyi;JIANG Tongtong;WANG Jingang(School of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, Heilongjiang, China)

机构地区：[1]东北农业大学园艺园林学院,黑龙江哈尔滨150030

出　　处：《草业科学》2018年第12期2924-2930,共7页Pratacultural Science

基　　金：国家重点研发计划项目(2016YFC0500300;2015RQQXJ021)

摘　　要：以远东芨芨草幼苗(Achnatherum extremiorientale)为试验材料,在模拟渗透胁迫处理(PEG-6000)下施加外源纳米硅肥(含环氧基的硅烷偶联剂,即Si-60),通过对其表型和生理指标进行测定,探究施加外源纳米硅肥对远东芨芨草幼苗应对渗透胁迫的响应。结果显示,相比于单独PEG-6000处理下,施加外源纳米硅肥显著增加了远东芨芨草幼苗株高、根长、鲜重和相对含水量(P<0.05);除淀粉外,其生理指标中可溶性糖含量、可溶性蛋白含量、游离脯氨酸含量和酶活性均显著高于单独PEG-6000处理,丙二醛含量则显著低于单独PEG-6000处理。本研究结果为施加外源纳米硅肥缓解PEG-6000处理下远东芨芨草幼苗的渗透胁迫损害、提高抗逆境胁迫能力,从而在园林绿化中的推广应用提供了理论参考和实践指导。In this study,Achnatherum extremiorientale was used as a test material and exogenous nano-silicon fertilizer(an epoxy-containing silane coupling agent,Si-60)was applied under simulated osmotic stress conditions(PEG-6000).On the basis of phenotypic determinations and physiological indicators,we investigated the effects of the application of exogenous nano-silicon fertilizer on the response of Valeriana fargesii seedlings to osmotic stress.The results showed that,compared with PEG-6000treatment alone,the application of exogenous nano-silicon fertilizer significantly increased the plant height,root length,fresh weight,and relative water content of Fargesia scoparium seedlings(P<0.05).Among the physiological indices,soluble sugar,soluble protein,and free proline content and enzyme activities were significantly higher in plants treated with exogenous nano-silicon fertilizer than in those treated with PEG-6000alone,whereas the content of malonaldehyde was significantly lower.The results of this study indicate that application of exogenous nano-silicon fertilizer can alleviate the osmotic stress damage in the seedlings of Fargesia spp.treated with PEG-6000,and can enhance the resistance to stress.These findings will provide theoretical reference and practical guidance for the acceptance and application of nano-silicon fertilizer in landscaping

关 键 词：PEG-6000 渗透胁迫 抗逆 生理指标 

分 类 号：S543.903.4[农业科学—作物学] Q945.78[生物学—植物学]