PEG-6000模拟干旱胁迫对8个玉米种质种子萌发及活力的影响  

Effects of PEG-6000 Simulated Drought Stress on Seed Germination and Seed Vigor of 8 Maize Germplasms

作　　者：赵璞[1] 温之雨[1] 董文琦[1] 田玉[2] 刘京宝[3] 马春红[1] ZHAO Pu;WEN Zhiyu;DONG Wenqi;TIAN Yu;LIU Jingbao;MA Chunhong(Institute of Genetic Physiology,Hebei Academy of Agriculture and Forestry Science/Hebei Plant Transgenic Center,Shijiazhuang 050051,China;Hebei Academy of Agriculture and Forestry Science,Shijiazhuang 050031,China;Cereal Crops Institute,He’nan Academy of Agricultural Sciences,Zhengzhou 450002,China)

机构地区：[1]河北省农林科学院遗传生理研究所/河北省植物转基因中心,石家庄050051 [2]河北省农林科学院,石家庄050031 [3]河南省农业科学院粮食作物研究所,郑州450002

出　　处：《种子》2020年第10期48-52,共5页Seed

基　　金：国家重点研发计划专项(2017YFD0300407);河北省农林科学院创新工程项目(C20C1001);科技部对外援助项目共同资助。

摘　　要：以8个玉米种质为材料,采用不同浓度的PEG-6000浓度(ck、5%、10%、15%、20%)模拟干旱,研究干旱对玉米种子萌发的影响。结果表明,随着PEG浓度的升高,干旱程度越高,发芽率越低,苗长、主根长、不定根数越少;根冠比缓慢升高。抗旱性好的品种发芽率、主根长、苗长等指标也相对较高。8个品种中,P 16-R和P 287的种子耐旱性较强。In this paper,8 maize germplasms were used to investigate the effects of drought on maize seed germination under simulated drought at different concentrations of PEG-6000(ck,5%,10%,15%,20%).The results showed that there were higher the drought degree,lower germination rate,lesser seedling length,main root length,adventitious root with the increase of PEG concentration and the root-cap ratio rose slowly.The characteristics of germination rate,main root length and seedling length in the varieties with good drought resistance were also relatively high.Among the 8 cultivars studied in this study,the seeds of‘P 16-R’and‘P 287’had strong drought tolerance.

关 键 词：玉米 干旱 种子萌发 

分 类 号：S513[农业科学—作物学]