LIU Shujun,LIU Aiqun,HE Ming.Effect of Exogenous Glycine Betaine on Eggplant Seedling Resistance Under Low Temperature Stress[J].Northern Horticulture,2018,42(22):57-61.[doi:10.11937/bfyy.20173648]
外源甜菜碱对低温胁迫下茄子幼苗抗性的影响
- Title:
- Effect of Exogenous Glycine Betaine on Eggplant Seedling Resistance Under Low Temperature Stress
- Keywords:
- glycine betaine; eggplant; low temperature stress; antioxidant enzyme
- 文献标志码:
- A
- 摘要:
- 甜菜碱对于维持低温胁迫下植物细胞的渗透平衡、提高作物抗逆性具有重要作用。试验以“辽茄6”茄子为试材，采用20、30、40、50 mmol·L-1甜菜碱溶液对茄子幼苗进行灌根处理，通过分析冷害指数、渗透物质含量以及抗氧化酶活性等生理生化指标，研究了外源甜菜碱对低温胁迫下茄子幼苗抗冷性的影响。结果表明：低温胁迫条件下，40 mmol·L-1甜菜碱溶液处理能够有效降低茄子幼苗叶片的电解质渗出率、冷害指数和丙二醛的含量，分别是清水对照的0.51、0.65、0.49倍，有效提高茄子叶片的恢复能力和超氧化物歧化酶（SOD）、过氧化氢酶（CAT）、过氧化物酶（POD）及苯丙氨酸解氨酶（PAL）活性，分别是清水对照的1.99、1.31、1.98、1.33、1.55倍。表明40 mmol·L-1甜菜碱能够有效缓解低温胁迫对茄子幼苗的氧化损伤，增强了茄子幼苗低温胁迫抗性。
- Abstract:
- Glycine betaine plays an important role in maintaining osmotic balance of cells under low temperature stress and could increase crops resistance.‘Liaoqie 6’ eggplant seedling was taken as test materials.Seedling root were irrigated with 20,30,40,50 mmol·L-1 glycine betaine,respectively.Under low temperature stress,the changes of physiological and biochemical indexes were analyzed,such as chilling injury index,osmotic substance content and activity of antioxidant enzymes,in order to study the influence of exogenous glycine betaine on eggplant seedling resistance.The results showed that under low temperature stress,40 mmol·L-1 exogenous glycine betaine solution could effectively reduce the electrolyte exudation rate,chilling index and malondialdehyde (MDA) content of eggplant seedling leaves,and the indexes were 0.51 times,0.65 times and 0.49 times of the water control,respectively.Adding exogenous glycine betaine could improve the recovery ability of eggplant leaves,and activities of SOD,CAT,POD and PAL.Indexes of recovery ability of eggplant leaves were 1.99 times of the water control.And,enzymatic activities of SOD,CAT,POD and PAL were 1.31,1.98,1.33 and 1.55 times of the control.So that,under low temperature stress,irrigating 40 mmol·L-1 glycine betaine could effectively reduce oxidative damage and enhance low temperature stress resistance of eggplant seedling.
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备注/Memo
第一作者简介：刘术均(1980)，男，硕士，助理研究员，现主要从事设施蔬菜栽培与生理等研究工作。Email:llssjj2000@163.com.基金项目：农业部现代农业产业技术体系资助项目（20176211602）。收稿日期：2018-08-26