摘要
盐胁迫可能是影响山西草地重要建群植物白羊草(Bothriochloa ischaemum)分布的主要因素。为探究盐胁迫对白羊草生长的影响,本研究采用水培法对‘太行’白羊草进行浓度分别为0、50、100、200和300 mmol·L^(-1)NaCl溶液的盐处理,并测定地上部和地下部的生长势以及地上部叶片的细胞膜透性、渗透调节物质含量和膜脂过氧化程度等相关指标。结果表明,盐胁迫对白羊草地上部和地下部的生长均具有显著抑制作用(P<0.05),且随着盐浓度的增加,抑制作用增强。叶片相对电导率大小及脯氨酸、丙二醛和可溶性糖含量均随盐处理浓度的增加呈上升趋势。叶片内超氧化物歧化酶和过氧化氢酶活性均随盐处理浓度的增加呈先升高后降低的趋势,且两者均在200 mmol·L^(-1)NaCl浓度处理时达到最大。本研究表明,白羊草在较高浓度的盐环境下,其生长发育会受到抑制。
Salt stress may be the main factor affecting the distribution of Bothriochloa ischaemum,an important constructive species in Shanxi grasslands.To explore the effects of salt stress on the growth of Bothriochloa ischaemum and its physical responses,B.ischaemum‘Taihang’was cultivated using hydroponics and treated with 0,50,100,200,and 300 mmol·L^(-1)NaCl solutions.The growth potential of the aboveground and underground parts,as well as the membrane permeability,content of osmotic regulating substances,and degree of membrane lipid peroxidation of the aboveground leaves,were measured.The results showed that salt stress had a significant(P<0.05)inhibitory effect on the growth of B.ischaemum,including the aboveground and underground parts,and the inhibitory effect was enhanced with an increase in salt concentration.The relative electrical conductivity and proline,malondialdehyde,and soluble sugar content in the leaves showed an upward trend with increasing salt concentration.The activity of superoxide dismutase and catalase in leaves increased and then decreased with increasing salt concentration,reaching a maximum of 200 mmol·L^(-1)NaCl.This study showed that the growth and development of B.ischaemum were inhibited in a high-salt environment.
作者
刘文静
杨志青
李钰莹
高守舆
张新荣
LIU Wenjing;YANG Zhiqing;LI Yuying;GAO Shouyu;ZHANG Xinrong(College of Grassland Science of Shanxi Agricultural University,Jinzhong 030801,Shanxi,China;Comprehensive Inspection and Testing Center of Jinyuan District,Taiyuan 030025,Shanxi,China)
出处
《草业科学》
CAS
CSCD
北大核心
2023年第10期2651-2658,共8页
Pratacultural Science
基金
山西农业大学科技创新基金项目(2017YJ06)
山西农业大学“十四五”生物育种工程项目(YZGC134)。
关键词
白羊草
NACL胁迫
抑制作用
膜质过氧化
膜透性
渗透调节
抗氧化
Bothriochloa ischaemum
NaCl stress
inhibitory effect
membrane lipid peroxidation
membrane permeability
osmotic regulation
antioxidation
