河南农业大学学报2024，Vol.58Issue(5)：791-799,9.DOI:10.16445/j.cnki.1000-2340.20240605.002
不同浓度外源硒对中等盐胁迫下小麦幼苗的影响
Effects of different concentrations of exogenous selenium on wheat seedlings under moderate salt stress
摘要
Abstract
[Objective]To explore the alleviating effects of different concentrations of exogenous seleni-um(Se)on moderate salt stress(100 mmol·L-1)of wheat seedlings.[Method]A hydroponic ex-periment was carried out with wheat Bainong 207 and sodium selenite as test materials.Five treatments were set up:CK(without adding NaCl and Se),Na(100 mmol·L-1 NaCl),NaSe5(100 mmol·L-1 NaCl+5 μmol·L-1 Se),NaSe10(100 mmol·L-1 NaCl+10 μmol·L-1 Se)and NaSe20(100 mmol·L-1 NaCl+20 μmol·L-1 Se).Wheat seedling biomass,root parameters,photosynthetic char-acteristics(photosynthetic pigment content and photosynthetic parameters)and ion balance(Na+,K+content and their transport coefficients)were determined.[Result]Compared with CK,the 100 mmol·L-1 NaCl stress significantly reduced dry matter accumulation,root morphological parameters,photo-synthetic characteristics,K+content and K+transport coefficient in shoot and root,but significantly in-creased Na+content and Na+transport coefficient in roots and shoot of wheat seedlings.Under medium salt stress,wheat seedling exhibited varying responses to different concentrations of exogenous Se.Among them,the application of 5 μmol·L-1 Se could increase dry weight,total root surface area,chlorophyll a and net photosynthetic rate of wheat seedlings to the greatest extent by 15.00%,44.36%,34.65%and 39.21%,respectively.At the same time,this treatment decreased the Na+transport coefficient and the Na+/K+ratio in the ground and root of wheat seedlings to 11.13%,42.37%and 51.18%.[Conclusion]Appropriate concentration of exogenous Se(5 μmol·L-1)can effectively alleviate the damage of moderate salt stress on the growth and development of wheat seedlings.关键词
小麦/中等盐胁迫/外源硒/光合特性/离子平衡Key words
wheat/moderate salt stress/exogenous selenium/photosynthetic characteristics/ion equilibrium分类
农业科技引用本文复制引用
王浩权,杨东霞,刘红恩,刘亥扬,刘文艺,陶志康,王灵璐,聂兆君..不同浓度外源硒对中等盐胁迫下小麦幼苗的影响[J].河南农业大学学报,2024,58(5):791-799,9.基金项目
"十四五"国家重点研发计划项目(2021YFD1700900) （2021YFD1700900）
河南省科技攻关项目(232102320117) （232102320117）
河南省高等学校重点科研项目(22A210018) （22A210018）
