不同浓度IAA浸种对PEG模拟干旱胁迫下辣椒种子萌发的影响  

Effects of Different IAA Immersion Concentrations on Seed Germination of Pepper under PEG Simulated Drought Stress

作　　者：李孟娟 吴睿 程宏 周慧丹 张芮豪 吕俊恒 邓明华[1] LI Mengjuan;WU Rui;CHENG Hong;ZHOU Huidan;ZHANG Ruihao;LV Junheng;DENG Minghua(College of Landscape Architecture and Horticulture,Yunnan Agricultural University,Kunming 650201)

机构地区：[1]云南农业大学园林园艺学院,云南昆明650201

出　　处：《长江蔬菜》2024年第20期56-61,共6页Journal of Changjiang Vegetables

基　　金：云南省科技计划项目(202102AE090005、202205AR070001)。

摘　　要：为探究不同浓度IAA浸种后,干旱胁迫下辣椒种子萌发特性和早期幼苗的生长情况,对4个辣椒品种(6421、博辣9号、兴蔬曲美和兴蔬215)用浓度为0 mg/L、0.1 mg/L、1.0 mg/L和2.0 mg/L的IAA浸种处理,后用15%PEG-6000模拟干旱胁迫进行发芽试验,测定辣椒种子的发芽率、发芽势、发芽指数、根长、芽长和根冠比。结果表明,不同浓度IAA浸种及不同品种对干旱胁迫下辣椒种子萌发的性状指标存在显著差异。1 mg/L浓度处理对6421辣椒种子萌发和幼苗生长促进作用明显;0.1 mg/L浓度处理和1.0 mg/L浓度处理分别对博辣9号辣椒种子萌发和幼苗生长促进作用明显;2.0 mg/L浓度处理对兴蔬曲美辣椒种子萌发和幼苗生长促进作用明显,2.0 mg/L浓度处理和1.0 mg/L浓度处理分别对兴蔬215辣椒种子萌发和幼苗生长促进作用明显。In order to investigate the seed germination characteristics and early seedling growth of pepper under drought stress after seed soaking with different IAA concentrations,four pepper cultivars(6421,BoLa No.9,Xingshuqumei and XingShu 215)were treated with IAA concentrations of 0 mg/L,0.1 mg/L,1 mg/L and 2 mg/L.15%PEG-6000 was used to simulate drought stress for germination test,and the germination rate,germination potential,germination index,root length,shoot length and root-to-crown ratio were determined.The results showed that there were significant differences in the traits of pepper seed germination under drought stress with different concentrations of IAA soaking and different cultivars.The treatment of 1 mg/L concentration had obvious promoting effect on seed germination and seedling growth of 6421 pepper.The 0.1 mg/L concentration treatment and 1.0 mg/L concentration treatment significantly promoted the seed germination and seedling growth of pepper Bola No.9,respectively.The 2.0 mg/L concentration treatment significantly promoted the seed germination and seedling growth of Xingshuqumei pepper,and the 2.0 mg/L concentration treatment and 1.0 mg/L concentration treatment significantly promoted the seed germination and seedling growth of Xingshu 215 pepper,respectively.

关 键 词：IAA浸种 干旱胁迫 辣椒 种子萌发 

分 类 号：S641.3[农业科学—蔬菜学]