盐旱胁迫对桑种子萌发的影响  

Effects of Salt and Drought Stress on Seed Germination of Morus alba

作　　者：白高娃 莎仁图雅[1,2,3,4] 姬媛媛 乌日恒 邢钟毓 邢钰坤 李银祥 刘佳[1] BAI Gaowa;Sharentuya;JI Yuanyuan;Wuriheng;XING Zhongyu;XING Yukun;LI Yinxiang;LIU Jia(Inner Mongolia Academy of Forestry Science,Hohhot 010010,China;Inner Mongolia Ordos Forest Ecosystem Nationd observation and Research Station,Ordos 016100,China;Inner Mongolia Engineering Laboratory of Economic Forest Sterile Virus-free Cultivation,Hohhot 010010,China;Key Laboratory of State Forestry and Grassland Administration on Sandy Land Biological Resources Conservation and Cultivation,Inner Mongolia,Hohhot 010010,China)

机构地区：[1]内蒙古自治区林业科学研究院,内蒙古呼和浩特010010 [2]内蒙古鄂尔多斯森林生态系统国家定位观测研究站,内蒙古鄂尔多斯016100 [3]内蒙古自治区经济林无菌脱毒培育工程实验室,内蒙古呼和浩特010010 [4]沙地生物资源保护与培育国家林业和草原局重点实验室,内蒙古呼和浩特010010

出　　处：《内蒙古林业科技》2023年第4期16-20,共5页Journal of Inner Mongolia Forestry Science and Technology

基　　金：中央引导地方科技发展资金项目(2022ZY0025);内蒙古自治区林业科学研究院自选项目(102001001)。

摘　　要：本文以桑(Morus alba)种子为试验材料,采用NaCl溶液和聚乙二醇6000(PEG-6000)溶液模拟盐旱胁迫环境,配备不同浓度的NaCl溶液(4 g·L^(-1)、8 g·L^(-1)、12 g·L^(-1)、16 g·L^(-1))和PEG-6000溶液(5%、10%、15%、20%),并由去离子水作对照,研究盐旱胁迫对桑种子萌发的影响。结果表明,随着NaCl、PEG-6000溶液浓度的增加,桑种子萌发率、萌发势、萌发指数、活力指数均呈下降趋势。在不同浓度NaCl、PEG-6000溶液胁迫下,桑种子萌发初始时间出现推后现象,在轻度盐胁迫(4 g·L^(-1))下,种子萌发初始时间相比对照提前1 d;桑种子萌发能够忍受的NaCl溶液最大浓度为4 g·L^(-1)、PEG-6000溶液最大浓度为10%,即忍受轻度盐胁迫和中度干旱胁迫。Taking the seeds of Morus alba as experimental material,NaCl solution(4 g·L^(-1),8 g·L^(-1),12 g·L^(-1),16 g·L^(-1))and PEG-6000 solution(5%、10%、15%、20%)were used to simulate the salt and drought stress environment with the deionized water as a control in order to study the effects of salt and drought stress on seed germination of Morus alba.The results showed that with the increase of NaCl and PEG-6000 solution concentration,the germination rate,germination potential,germination index and vitality index of the seeds of Morus alba decreased.Under different concentrations of NaCl and PEG-6000 stress,the initial germination time of the seeds of Morus alba delayed,and under mild salt stress(4 g·L^(-1)),the initial germination time of the seeds of Morus alba was 1 day earlier than that of control.The maximum concentration of NaCl solution and PEG-6000 solution that could be tolerated for seed germination was 4 g·L^(-1) and 10%,which meant that the seeds could tolerate mild salt stress and moderate drought stress.

关 键 词：桑 盐胁迫 干旱胁迫 种子萌发 

分 类 号：Q948.11[生物学—植物学]