盐碱胁迫对黑麦草种子萌发的影响  

Effects of Salt and Alkali Stress on Seed Germination of Lolium perenne

作　　者：王佳文 杨新宇 刘晗 于爽[1] WANG Jiawen;YANG Xinyu;LIU Han;YU Shuang(College of Life Science and Technology,Mudanjiang Normal University,Mudanjiang 157011,China)

机构地区：[1]牡丹江师范学院生命科学与技术学院,黑龙江牡丹江157011

出　　处：《东北农业科学》2023年第1期60-62,74,共4页Journal of Northeast Agricultural Sciences

基　　金：黑龙江省省属高等学校基本科研业务费科研项目(1353ZD007);牡丹江师范学院博士科研启动基金项目(MNUB202001);牡丹江师范学院研究生科技创新项目(kjcx2020-10mdjnu)。

摘　　要：为探明黑麦草种子在不同盐碱胁迫下的萌发特性,采用培养皿纸上发芽法,用不同钠盐溶液(NaCl、NaHCO_(3)、NaCl与NaHCO_(3)混合液)对黑麦草种子分别进行处理,设置0(对照)、40、80、120、160、200、240、280 mmol/L 8个浓度梯度,检测黑麦草种子萌发指标变化。结果表明:随着盐碱浓度的增加,黑麦草种子的发芽率、发芽指数和活力指数呈不同程度降低,等Na+浓度时,NaCl处理的各项指标均高于NaHCO_(3)处理;发芽势在混合盐胁迫下表现为较低浓度(40 mmol/L)促进,较高浓度(120、160、200 mmol/L)抑制,而NaHCO_(3)处理则不断下降;黑麦草种子相对盐害率表现为NaCl<混合盐<NaHCO_(3),说明NaHCO_(3)对黑麦草种子的影响比NaCl更为显著。In order to explore the germination characteristics of Lolium perenne seeds under different salt and alkali stress,the method of germination on dish paper was used to treat ryegrass seeds with different sodium salt solutions(NaCl,NaHCO_(3),NaCl and NaHCO_(3)mixture).Eight concentration gradients of 0(control),40,80,120,160,200,240,280 mmol/L were set to detect the changes of germination indexes of Lolium perenne seeds.The results showed that the germination rate,germination index and vigor index of Lolium perenne seeds decreased with the increase of salt and alkali stress concentration.When the concentration of Na+was equal,the indexes under NaCl treatment were higher than those under NaHCO_(3)treatment;the germination potential was promoted by the lower concentration(40 mmol/L)and inhibited by the higher concentration(120/160/200 mmol/L),but decreased under NaHCO_(3)treatment;the relative salt injury rate of Lolium perenne seeds perform as NaCl<mixed salt<NaHCO_(3),which indicated that NaHCO_(3)had a more significant effect on Lolium perenne seeds than NaCl.

关 键 词：黑麦草 中碱钠盐 发芽率 发芽势 发芽指数 

分 类 号：S543.6[农业科学—作物学]