CHEN Yuan,WANG Yuanhui,PI Jing,et al.Exogenous Nitric Induced Physiological Response of Capsicum annuum L.Under UV-B Stress[J].Northern Horticulture,2021,(07):8-13.[doi:10.11937/bfyy.20202763]
外源NO诱导辣椒对UV-B胁迫的生理响应
- Title:
- Exogenous Nitric Induced Physiological Response of Capsicum annuum L.Under UV-B Stress
- Keywords:
- Capsicum annuum L.; UV-B stress; exogenous nitric; photosynthesis; antioxidant
- 文献标志码:
- A
- 摘要:
- 以果期辣椒为试材，研究不同浓度〖JP3〗外源NO供体硝普钠（SNP）对UV-B胁迫下辣椒的生理响应，旨在为辣椒栽培生产提供科学参考依据。结果表明：喷施SNP(3 mmol?L-1)显著提高了UV-B胁迫下辣椒叶片的光合色素含量，光合荧光参数Fv/Fm，抗氧化酶活性（SOD、POD、CAT）和可溶性糖含量；光合荧光参数Fo、丙二醛（MDA）含量显著降低，从而降低了UV-B胁迫对果期辣椒的伤害。综上所述，外源NO参与了辣椒对UV-B胁迫的应答与防御，提高了辣椒对UV-B胁迫的抗性。
- Abstract:
- In this study，the effects of different concentrations of exogenous nitric donor sodium nitroprusside (SNP) on physiological characteristics of Capsicum annuum L.under UV-B stress was studied using pepper in fruit period in order to procide a scientific basis for Capsicum annuum L.cultivation and production.The results showed that under UV-B stress，spraying SNP (3 mmol?L-1) significantly increased photosynthetic pigment content，photosynthetic fluorescence parameters Fv/Fm，antioxidant enzyme activities (SOD，POD，CAT) and soluble sugar content in Capsicum annuum L.leaves.Photosynthetic fluorescence parameters Fo and MDA content were significantly reduced；thereby alleviating the damage of chili by UV-B radiation.Exogenous nitric participates in the response and defense of Capsicum annuum L.to UV-B stress，increases the resistance of Capsicum annuum L.to UV-B stress.
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备注/Memo
第一作者简介：陈媛（1983-），女，硕士，助理研究员，现主要从事花境植物应用与花卉逆境生理等研究工作。E-mail：85182608@qq.com.责任作者：王远会（1972-），女，本科，副研究员，现主要从事都市农业园区规划与园林植物应用等研究工作。E-mail:l491019751@qq.com.基金项目：重庆市技术创新与应用示范资助项目(cstc2018jscx-mszd0369)。收稿日期：2020-07-01