FAN Haixia,ZHAO Sa,XIN Guoqi,et al.Effects of Exogenous Nitric Oxide on Physiological Characteristics of Chrysanthemum Seedling Under Salt Stress[J].Northern Horticulture,2020,44(19):70-77.[doi:10.11937/bfyy.20193774]
外源NO对盐胁迫下菊花幼苗生理特性的影响
- Title:
- Effects of Exogenous Nitric Oxide on Physiological Characteristics of Chrysanthemum Seedling Under Salt Stress
- Keywords:
- chrysanthemum; salt stress; nitric oxide; osmotic adjustment
- 文献标志码:
- A
- 摘要:
- 以菊花‘神马’品种为试材，采用水培方法，研究了外源NO供体硝普钠（SNP）对菊花幼苗叶片的生长量、相对含水量、抗氧化酶活性、相对电导率、离子含量、渗透调节物质含量、丙二醛含量和光合色素含量的影响，以期探究SNP与菊花耐盐机制的联系。结果表明：盐胁迫对菊花幼苗有显著损伤，而外源NO供体硝普钠能够降低其丙二醛、钠离子的含量，可提高生长量、相对含水量、钾离子含量和抗氧化酶活性，也能够使光合色素含量最大程度接近CK处理，说明一定浓度的硝普钠能通过调节植株抗氧化活性、渗透调节水平来缓解盐胁迫损伤。
- Abstract:
- The chrysanthemum variety ‘Shenma’ was used as material，and the hydroponic method was used to study the effect of exogenous NO donor sodium nitroprusside (SNP) on chrysanthemum seedlings.The measured indicators include leaf growth，relative water content，antioxidant enzyme activity，relative conductivity，ion content，osmotic adjustment substance content，malondialdehyde content and photosynthetic pigment content,in order to explore the relationship between SNP and the salt tolerance mechanism of chrysanthemum.The results showed that salt stress significantly damaged chrysanthemum seedlings.The exogenous NO donor sodium nitroprusside could reduce the content of malondialdehyde and sodium ions.It also could increase the growth amount，relative water content，potassium ion content and antioxidant enzyme activity，and maximize the photosynthetic pigment content close to CK treatment.It indicated that a certain concentration of sodium nitroprusside could alleviate salt stress damage by regulating plant antioxidant activity，osmotic adjustment level and photosynthesis.
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备注/Memo
第一作者简介：范海霞（1970-），女，硕士，副教授，现主要从事园林植物栽培与应用等研究工作。E-mail:fanghua6789@sina.com.基金项目：河南省科技兴林资助项目（豫财农[2014]86号文）。收稿日期：2019-10-08