胡麻萌发期和苗期对盐胁迫的阈值分析  

Threshold Analysis of Salt Stress in Flax at Germination and seedling Stage

作　　者：赵玮[1] 马海霞[2] 张艳萍[3] ZHAO Wei;MA Haixia;ZHANG Yanping(Crop Research Institute,Gansu Academy of Agricultural Sciences, Lanzhou 730070, China;2 Institute of Biotechnology, Gansu Academy of Agricultural Science.,Lanzhou 730070,China;3 Institute of Agricultural and Economic Information,Gansu Academy of Agricultural Sciences, Lanzhou 730070, China)

机构地区：[1]甘肃省农业科学院作物研究所,兰州730070 [2]甘肃省农业科学院农业经济与信息研究所,兰州730070 [3]甘肃省农业科学院生物技术研究所,兰州730070

出　　处：《新疆农业科学》2022年第1期145-154,共10页Xinjiang Agricultural Sciences

基　　金：国家自然科学基金(31560347);甘肃省知识产权计划(21ZSCQ026);甘肃省农业科学院科研条件建设与成果转化-重点研发计划(2021GAAS18);兰州市引进国外智力成果示范推广基地;兰州市产学研合作基地(2021-1-35);兰州市人才创新创业项目(2021-RC-64)。

摘　　要：【目的】研究单盐(NaCl)和复盐(Na_(2)SO_(4)、NaHCO_(3))胁迫下对胡麻萌发期和苗期生长以及耐盐阈值的影响,为胡麻耐盐材料的筛选提供基础参考。【方法】选用耐盐性不同的2个胡麻品种,设置不同浓度的盐胁迫处理,分析不同指标的变化,采用相关性和回归分析,萌发期单盐胁迫选取总鲜重、复盐胁迫选取发芽率,苗期单盐胁迫选取根干重、复盐胁迫选取总鲜重等指标与盐胁迫浓度建立了二次回归方程:Y=42.949x^(2)-263.158x+224.564、Y=5.194x^(2)-111.128x+109.467、Y=81.772x^(2)-302.544x+382.076、Y=68.568x^(2)-278.918x+326.567,以选定指标较对照降低50%为标准,分别计算萌发期和苗期的耐盐阈值。【结果】萌发期单盐(NaCl)胁迫阈值为103.72225 mmol/L;萌发期复盐(Na_(2)SO_(4)、NaHCO_(3))胁迫阈值为55.2015 mmol/L;苗期单盐(NaCl)胁迫阈值为251.247 mmol/L;苗期复盐(Na_(2)SO_(4)、NaHCO_(3))胁迫阈值为204.25 mmol/L。【结论】胡麻对中性盐比碱性盐的耐受力要强;胡麻不同组织对盐胁迫的耐受力存在较大差别;胡麻萌发期和苗期的耐盐性不具有一致性。【Objective】In order to provide the basic reference for screening salt-tolerant flax materials,we study the growth and the salt tolerance threshold of flax under the single salt(NaCl)and the mixed salt(Na_(2)SO_(4)、NaHCO_(3))in germination stage and seedling stage.【Method】We selected two flax varieties with different salt tolerance to be treated with salt solution of different concentrations,then studied the changes of different indicators.Through correlation and regression analysis,the indictors which were total fresh weight in single salt stress at germination stage、germination rate in mixed salt stress at germination stage、root dry weight in single salt stress at seedling stage and total fresh weight in mixed salt stress at seedling stage were selected to establish the quadratic regression equation with salt stress concentration:Y=42.949x^(2)-263.158x+224.564、Y=5.194x^(2)-111.128x+109.467、Y=81.772x^(2)-302.544x+382.076、Y=68.568x^(2)-278.918x+326.567.Taking reduced 50%of the selected indicators compared with the control as standard to calculate the salt tolerance threshold of flax in germination stage and seedling stage.【Result】The threshold values of single salt(NaCl)stress in germination stage、mixed salt(Na_(2)SO_(4)、NaHCO_(3))stress in germination stage、single salt(NaCl)stress in seedling stage and mixed salt(Na_(2)SO_(4)、NaHCO_(3))stress in seedling stage were respectively 103.722,25,55.201,5,251.247 and 204.25 mmol/L by calculated.【Conclusion】The tolerance of flax to neutral salt was stronger than that of alkaline salt.The salt tolerance of different tissues of flax has great difference.At the germination and seedling stage of flax,the salt tolerance was not consistent.

关 键 词：胡麻 盐胁迫 萌发期 苗期 耐盐阈值 

分 类 号：S563[农业科学—作物学]