摘要
为研究甜菜真叶期对不同中性盐产生的生理响应,选用甜菜‘KWS1176’为研究对象,采用土培方式进行,试验设置三种盐处理:NaCl、Na_(2)SO_(4)及二者混合盐(n(NaCl)∶n(Na_(2)SO_(4))=2∶1),并设置三个不同盐度水平,即土壤饱和电导率分别为(6.0±0.5)、(12.0±0.5)和(18.0±0.5)mS·cm^(-1),以模拟低盐、中盐和高盐环境,通过测定一系列生理指标,评估甜菜在不同中性盐处理条件下的生长状况和生理变化。结果表明,低盐促进甜菜的生长,且Na_(2)SO_(4)处理效果最好。但随着盐度的增加,三种盐处理对甜菜的抑制作用均增强。中、高盐度下,甜菜的生长状况、生物量累积、质膜完整性及光合作用相关指标受到抑制,抑制水平为NaCl>混合盐>Na_(2)SO_(4),Na_(2)SO_(4)处理盐害程度最低。同时,抗氧化酶活性升高,活性增强程度为NaCl>混合盐>Na_(2)SO_(4),进一步证实了Na_(2)SO_(4)处理下甜菜的盐害程度最小。综上,低盐促进甜菜生长,高盐抑制甜菜生长,且Na_(2)SO_(4)处理下,甜菜具有更强的适应能力。
In order to study the physiological response of sugar beet to different neutral salts produced during the true-leaf stage,sugar beet‘KWS1176’was selected as the research object,which was carried out by soil cultivation,and the experiment was set up with three salt treatments:NaCl,Na_(2)SO_(4) and a mixture of the two salts(n(NaCl)∶n(Na_(2)SO_(4))=2∶1).Three different salinity levels(i.e.soil saturated electrical conductivity of(6.0±0.5),(12.0±0.5)and(18.0±0.5)mS·cm^(-1))were set to simulate low,medium and high salt environments.A series of physiological indexes were measured to assess the growth status and physiological changes of sugar beet under different neutral salt treatment conditions.The results demonstrate that low salt promotes growth in sugar beet,with Na_(2)SO_(4) treatment is proved to be the most effective.However,the inhibitory effect of three salt treatment on sugar beet increases with increasing salinity.Under medium and high salinity conditions,the growth condition,biomass accumulation,plasma membrane integrity,and photosynthesis-related indices of sugar beet are inhibited.The inhibition level follows the order NaCl>mixed salt>Na_(2)SO_(4),with the degree of salt damage being lowest in the Na_(2)SO_(4) treatment.Concurrently,the activity of antioxidant enzymes increases,with the degree of enhancement following NaCl>mixed salt>Na_(2)SO_(4),further substantiating that salt damage to sugar beet is minimal under Na_(2)SO_(4) treatment.These findings support the conclusion that low salt promotes sugar beet growth,while high salt inhibits sugar beet growth,and that sugar beet exhibits stronger adaptive capacity under Na_(2)SO_(4) treatment.
作者
尚旭怡
蔡琪琪
刘佳慧
徐瑶
耿贵
SHANG Xuyi;CAI Qiqi;LIU Jiahui;XU Yao;GENG Gui(Engineering Research Center of Agricultural Microbiology Technology,Ministry of Education/Heilongjiang Provincial Key Laboratory of Ecological Restoration and Resource Utilization for Cold Region,School of Life Sciences,Heilongjiang University,Harbin 150080,China;Heilongjiang Provincial Key Laboratory of Plant Genetic Engineering and Biological Fermentation Engineering for Cold Region,Key Laboratory of Microbiology,College of Heilongjiang Province,Heilongjiang University,Harbin 150080,China;College of Modern Agriculture and Ecological Environment,Heilongjiang University,Harbin 150080,China)
出处
《黑龙江大学自然科学学报》
2025年第4期442-452,共11页
Journal of Natural Science of Heilongjiang University
基金
国家自然科学基金资助项目(32272148)。
