NaCl胁迫对3种红千层生长与生理特性的影响  

Effect of Different Concentration of NaCl Stress on Growth and Physiological Properties of 2 Species of Callistemon and One Cultivar of C.rigidus‘Reeves Pink’

作　　者：石磊 石杜娟 俞狄虎 陈叶平 SHI Lei;SHI Dujuan;YU Dihu;CHEN Yeping(Zhoushan Forestry Extension Station,Zhoushan Forestry Institute of Zhejiang,Dinghai 316000,China;Daishan Natural Resources and Planning Bureau of Zhejiang,Daishan 316200,China)

机构地区：[1]舟山市林业科学研究院舟山市林业技术推广中心,浙江定海316000 [2]岱山县自然资源和规划局,浙江岱山316200

出　　处：《浙江林业科技》2024年第3期26-32,共7页Journal of Zhejiang Forestry Science and Technology

基　　金：舟山市科技计划项目(计划编号:2020C31017),浙江省林业专项资金项目(浙林规﹝2023﹞10号)。

摘　　要：为明确红千层属Callistemon植物对NaCl胁迫的生理响应,采用温室盆栽法对多花红千层C.speciosus、帝王红千层C.austraflora和‘李维斯粉’红千层C.rigidus‘Reeves Pink’2年生幼苗进行盐胁迫试验,设置NaCl浓度梯度为0(CK)、0.20%、0.40%、0.60%和0.80%共5个处理,在胁迫30 d时,分别测定不同盐胁迫处理下ebreak/>3种红千层的存活率、生物量、叶绿素含量、脯氨酸含量、可溶性糖含量和抗氧化酶活性等生理生化指标。结果表明,随着NaCl胁迫浓度的增加,3种红千层的存活率、生物量和叶绿素含量均呈下降趋势,在NaCl浓度为0.80%时,多花红千层和‘李维斯粉’红千层的存活率均低于10.00%,而帝王红千层的存活率为27.27%。3种红千层的超氧化物歧化酶(SOD)和过氧化氢酶(CAT)活性均随NaCl胁迫浓度的增加呈先上升后下降的趋势,过氧化物酶(POD)活性则呈持续上升的趋势,其中帝王红千层的SOD、CAT和POD酶活性最高。隶属函数法分析表明,帝王红千层隶属值最高,具有最强耐盐性能,适合应用于滨海高盐地区的园林绿化、山体造林及滩涂盐渍地复绿。In March 2022,2-year seedlings of Callistemon speciosus,C.austraflora and C.rigidus‘Reeves Pink’were potted in Zhoushan,Zhejiang province for recovering.One month later,experiments were conducted on seedlings treated by different concentrations of NaCl(0,0.20%,0.40%,0.60%and 0.80%).30 days later,determinations were carried out survival rate,biomass,chlorophyll content,proline content,soluble sugar content and antioxidant enzyme activities.The results showed that survival rate,biomass and chlorophyll content of tested seedlings decreased with the in-crease of NaCl concentration.The survival rate of C.speciosus and C.rigidus‘Reeves Pink’treated by NaCl of 0.80%was less than 10.00%,while that of C.austraflora was 27.27%.The activities of SOD and CAT of treated seedlings showed a trend of increase first and then decrease with the in-crease of salt concentration,while POD continued to increase.The experiment demonstrated that C.austraflora seedling had the highest SOD,CAT,and POD activities.The membership function analysis showed the C.austraflora had the highest membership value,indicating that it had the strongest salt-resistant,suitable for landscape,afforestation and the restoration of salt land.

关 键 词：NACL胁迫 红千层属 生长 生理特征 

分 类 号：S685[农业科学—观赏园艺]