外源硅对盐胁迫下娃娃菜种子萌发及幼苗生理特性的影响  

Effects of Exogenous Silicon on Seed Germination and Physiological Characteristics of Brassica pekinensis under Salt Stress

作　　者：鄂利锋 徐金崇[1] 陈修斌 权建华 华军[3] 尹丽娟 王舜奇 赵文勤 E Lifeng;Xu Jinchong;Chen Xiubin;Quan Jianhua;Hua Jun;Yin Lijuan;Wang Shunqi;Zhao Wenqin(College of Agriculture and Ecological Engineering,Hexi University,Zhangye 734000,Gansu,China;Hexi Corridor Precision Facility Horticulture Engineering and Technology Research Center,Hexi University,Zhangye 734000,Gansu,China;Zhangye Economic Crops Technical Extension Station,Zhangye 734000,Gansu,China;Linze County Agricultural Technology Extension Center,Linze 734200,Gansu,China;Gansu Huamei Agricultural Science and Technology Company Limited,Zhangye 734000,Gansu,China)

机构地区：[1]河西学院农业与生态工程学院,甘肃张掖734000 [2]河西学院河西走廊精准设施园艺工程技术研究中心,甘肃张掖734000 [3]张掖市经济作物技术推广站,甘肃张掖734000 [4]临泽县农业技术推广中心,甘肃临泽734200 [5]甘肃华美农业科技有限公司,甘肃张掖734000

出　　处：《作物杂志》2024年第6期212-217,共6页Crops

基　　金：张掖市科技计划项目(ZY2022RC01)。

摘　　要：为探究不同浓度外源硅对盐胁迫下娃娃菜种子萌发及幼苗生理特性的影响,以娃娃菜品种“华耐B1102春玉黄”为试验材料,采用单因素完全随机区组设计,在85.55 mmol/L Na Cl盐胁迫下,共设6个处理,分别为CK1(蒸馏水)、CK2(Na Cl)、A1(Na Cl+0.5 mmol/L Si)、A2(Na Cl+1.0 mmol/L Si)、A3(Na Cl+2.0 mmol/L Si)和A4(Na Cl+4.0 mmol/L Si),每个处理3次重复,测定娃娃菜种子萌发和幼苗生长指标及生理活性的变化。结果表明,不同浓度外源硅均可有效缓解盐胁迫对娃娃菜种子和幼苗带来的伤害,当硅浓度为1.0 mmol/L时,娃娃菜种子的发芽率、发芽势、发芽指数和活力指数显著提高;同时娃娃菜幼苗的株高、茎粗、叶面积、根系体积和叶绿素含量也显著增加,其叶片过氧化物酶活性增高,丙二醛含量下降。外源硅可有效调节盐胁迫对华耐B1102春玉黄娃娃菜种子萌发及幼苗生长的抑制,其缓解盐胁迫效果最佳的硅浓度为1.0 mmol/L。In order to explore the effects of different concentrations of exogenous silicon on seed germination and seedling physiological characteristics of Brassica pekinensis under salt stress,the variety“Huanai B1102 Chunyuhuang”was used as the test material,a single-factor completely randomized block design was conducted.Under 85.55 mmol/L NaCl salt stress,six treatments were set up:CK1(distilled water),CK2(NaCl),A1(NaCl+0.5 mmol/L Si),A2(NaCl+1.0 mmol/L Si),A3(NaCl+2.0 mmol/L Si),and A4(NaCl+4.0 mmol/L Si),each treatment was repeated three times.The changes of seed germination,seedling growth index and physiological activity were determined.The results showed that different concentrations of exogenous silicon could effectively alleviate the damage caused by salt stress to the seeds and seedlings of Brassica pekinensis.When the concentration of silicon was 1.0 mmol/L,the germination rate,germination potential,germination index and vigor index of Brassica pekinensis seeds were significantly increased.At the same time,the plant height,stem diameter,leaf area,root volume and chlorophyll content of Brassica pekinensis seedlings also increased significantly,the activity of peroxidase in leaves increased,and the content of malondialdehyde decreased.Exogenous silicon could effectively regulate the inhibition of salt stress on seed germination and seedling growth of“Huanai B1102 Chunyuhuang”,and the best concentration of silicon to alleviate salt stress was 1.0 mmol/L.

关 键 词：娃娃菜 外源硅 盐胁迫 种子萌发 幼苗生长 

分 类 号：S634[农业科学—蔬菜学]