盐碱胁迫下五种苔藓植物的耐受性研究  

Tolerance of five bryophytes under saline and alkaline stress

作　　者：张桂佳 雷少刚[2] 程伟[2] 冯超 ZHANG Guijia;LEI Shaogang;CHENG Wei;FENG Chao(College of Grassland and Resource Environment,Inner Mongolia Agricultural University,Key Laboratory of Grassland Resources of the Ministry of Education,Key Laboratory of Forage Cultivation,Processing and Efficient Utilization of the Ministry of Agriculture,Hohhot O100ll;College of Environment and Surveying and Mapping,China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]内蒙古农业大学草原与资源环境学院,草地资源教育部重点实验室,农业部饲草栽培,加工与高效利用重点实验室,呼和浩特010011 [2]中国矿业大学环境与测绘学院,徐州221116

出　　处：《干旱区资源与环境》2025年第1期160-168,共9页Journal of Arid Land Resources and Environment

基　　金：国家自然科学基金重大项目课题(52394139);国家自然科学基金(32060051,32460052);鄂尔多斯科技合作重大专项资助项目(2021EEDSCXQDFZ010);内蒙古重点研发和成果转化计划项目(2023YFDZ0016)资助。

摘　　要：为筛选适宜北方草原盐碱地进行植被恢复的苔藓物种,以青藓(Brachythecium albicans(Hedw.)Schimp.)、绢藓(Enonton cladorrhizans(Hedw.)Müll.Hal.)、山羽藓(Abietinella abietina(Hedw.)M.Fleisch.)、真藓(Bryum argenteum Hedw.)和短叶对齿藓(Didymodon tectorum(Müll.Hal.)K.Saito)这5种北方草原区优势苔藓植物为试验材料,通过4种不同浓度的盐碱胁迫,探究5种苔藓植物对盐碱胁迫的生理响应以及耐盐碱能力的差异。结果表明:50-100mmol·L^(-1)的盐碱溶液可以促进苔藓植物光合色素和可溶性糖含量;150mmol·L^(-1)以上的盐碱溶液提高苔藓植物的渗透调节能力以减少盐碱胁迫对自身的危害,进而适应盐碱环境;且随盐碱溶液浓度的升高,苔藓植物过氧化物酶(POD)活性会受到不同程度的抑制,超氧化物歧化酶(SOD)和过氧化氢酶(CAT)活性受到不同程度的促进。通过隶属函数法对5种苔藓植物耐盐碱能力进行评价,五种苔藓植物的抗盐碱能力为:短叶对齿藓>绢藓>山羽藓>真藓>青藓,短叶对齿藓更适合作为盐碱地植被恢复的备选物种。In order to screen bryophyte species suitable for vegetation restoration in saline and alkaline areas of the northern steppe,the bryophyte Brachythecium albicans(Hedw.)Schimp.,Enonton cladorrhizans(Hedw.)Müll.Hal.,Abietinella abietina(Hedw.)M.Fleisch.,Bryum argenteum Hedw.,and Didymodon tectorum(Müll.Hal.)K.Saito,which are the dominant bryophytes in the northern grassland area,were used as test materials to investigate the physiological responses of bryophytes to saline-alkaline stresses at four different concentrations of saline-alkaline treatment.The results showed that 50-100mmol·L^(-1)of saline solution could promote the content of photosynthetic pigments and soluble sugars in bryophytes.150 mmol·L^(-1)or above of the saline solution induced the bryophytes to produce a large amount of proline and soluble proteins in order to reduce the harm of saline-alkaline stress to themselves,and then adapted to the saline environment,and with the increase of concentration of saline solution,the activities of peroxidase(POD)and catalase(CAT)were inhibited to varying degrees.With the increase of saline solution concentration,the peroxidase(POD)activity of bryophytes was inhibited to different degrees,and the activities of superoxide dismutase(SOD)and catalase(CAT)were promoted to different degrees.Combined with the results of the overall evaluation of the salinity tolerance of the five bryophytes by the affiliation function method,the tolerance capacity of five species are as follows:Didymodon tectorum(Müll.Hal.)K.Saito>Enonton cladorrhizans(Hedw.)Müll.Hal.>Abietinella abietina(Hedw.)M.Fleisch.>Bryum argenteum Hedw.>Brachythecium albicans(Hedw.)Schimp.,and D.tectorum(Müll.Hal.)K.Saito as an alternative species is more suitable for re-vegetation in saline and alkaline land.

关 键 词：苔藓植物 盐碱胁迫 生理特性 综合评价 耐受能力 

分 类 号：Q949.35[生物学—植物学] Q945.78