防腐剂胁迫下外源芸苔素内酯对玉米幼苗生长及抗性的影响  

Influence of exogenous brassinolide on the growth and resistance of maize seedling with preservative stress

作　　者：胡春红[1] 郭婕[1] 陈龙[1] 李季平[1] 乔琳[1] 何乐[1] 

机构地区：[1]周口师范学院生命科学与农学学院,河南周口466001

出　　处：《湖南农业大学学报（自然科学版）》2014年第2期113-116,共4页Journal of Hunan Agricultural University(Natural Sciences)

基　　金：国家重点实验室项目(CB2013A15);河南省科学技术厅科技计划项目(142300410310);河南省教育厅自然科学研究计划重点项目(12A180029);周口师范学院青年科研基金项目(zksyqn201325A)

摘　　要：采用改良土培法,研究防腐剂胁迫下玉米幼苗对不同浓度芸苔素内酯处理的响应,探索外源芸苔素内酯缓解防腐剂对玉米胁迫的适宜浓度。结果表明:10.0 g/L复合防腐剂(苯甲酸钠、山梨酸钾的质量比为2∶3)显著抑制玉米幼苗生长发育,玉米出苗延迟,植株矮化,叶绿素含量、根系活力均降低,膜过氧化加剧;适宜浓度芸苔素内酯处理能提高玉米幼苗的抗性,缓解复合防腐剂的胁迫,且以质量浓度0.12 mg/L芸苔素内酯处理的效果最佳。In order to investigate the right dose of exogenous brassinolide on alleviating the compound preservative （the mass ratio of sodium benzoate to potassium sorbate was 2 ： 3） stress, maize seedling was employed to test its response to various concentration of brassinolide by improved soil culture. The results showed that compound preservative with 10.0 g/L concentration had a significant inhibition on maize seedling, which resulted in seedling emergence delayed, plant dwarfed, chlorophyll content declined, root vigor lowered, and membrane peroxidation exacerbated. However, the resistance of maize seedlings to compound preservative could improve with applied appropriate concentration of brassinolide as well as alleviated its stress. The best concentration of brassinolide to alleviate the stress of compound preservative was 0.12 mg/L.

关 键 词：玉米 芸苔素内酯 防腐剂胁迫 改良土培法 

分 类 号：S513[农业科学—作物学] Q945.78[生物学—植物学]