草业学报2018，Vol.27Issue(4)：202-208,7.DOI:10.11686/cyxb2017324
抗坏血酸引发对NaCl胁迫燕麦种子活力的影响
Effect of ascorbic acid priming on the vigor of oat seeds under NaCl stress
摘要
Abstract
An experiment was undertaken to study the effects of ascorbic acid (AsA) priming on oat seed germination and seedling growth under salt stress conditions.Oat seeds were primed with different AsA concentrations (0,0.5,1.0,1.5 and 2.0 mmol · L-1) and then germinated in different concentrations of NaCl stress (0,50,100 and 200 mmol · L-1).Changes in germination percentage (Gp),germination index (Gi) and mean germination time (MGT) were analyzed.Results showed that the Gp,Gi and MGT of oat seeds declined significantly under NaCl stress.With increasing AsA concentrations,Gp at first increased and then decreased under NaCl stress at 100 and 200 mmol · L-1.However,the seeds' Gi declined with increasing AsA concentrations,while their MGT increased.The effects of different concentrations of AsA and NaCl and their interaction on Gp,Gi and MGT were highly significant (P＜0.01).The level of oat seed vigor was decreased by NaCl stress.However,priming with exogenous AsA promoted the vigor of salt-stressed seeds and this effect was closely related to the concentrations of AsA and NaCl.Optimal effects were reached at AsA concentrations of 1.0 mmol · L-1 under NaCl stress at 100 and 200 mmol · L-1.However,the germination time of oat seeds was prolonged by AsA priming under NaCl stress.关键词
抗坏血酸/燕麦/引发/种子活力/NaCl胁迫Key words
ascorbic acid/oat/priming/seed vigor/NaCl stress引用本文复制引用
董秋丽,夏方山,李晓禹,王明亚,毛培胜,朱慧森,佟莉蓉,杜利霞..抗坏血酸引发对NaCl胁迫燕麦种子活力的影响[J].草业学报,2018,27(4):202-208,7.基金项目
国家自然科学基金青年基金项目(31702171),山西省应用基础研究项目青年科技研究基金(201701D221154)和山西农业大学科技创新基金项目(2016YJ15)资助. （31702171）
