12C6+辐照及航天诱变对无芒隐子草种子萌发、幼苗生长及叶绿素荧光特性的影响  

Effects of 12C6+ irradiation and space mutation on seed germination, seedling growth,and chlorophyll fluorescence characteristics of Cleistogenes songorica

作　　者：李洁 马甜甜 剡转转 闫启[1] 周利斌[2] 余玲[1] 张吉宇[1] LI Jie;MA Tiantian;YAN Zhuanzhuan;YAN Qi;ZHOU Libin;YU Ling;ZHANG Jiyu(State Key Laboratory of Grassland Agroecosystems/Key Laboratory of Grassland Livestock Industry Innovation,Ministry of Agriculture and Rural Affairs/Engineering Research Center of Grassland Industry,Ministry of Education/College of Pastoral Agriculture Science and Technology,Lanzhou University,Lanzhou 730020,Gansu,China;Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,Gansu,China)

机构地区：[1]兰州大学草地农业生态系统国家重点实验室/兰州大学农业农村部草牧业创新重点实验室/兰州大学草地农业教育部工程研究中心/兰州大学草地农业科技学院,甘肃兰州730020 [2]中国科学院近代物理研究所,甘肃兰州730000

出　　处：《草业科学》2019年第8期2033-2041,共9页Pratacultural Science

基　　金：国家自然科学基金(31572453);教育部长江学者和创新团队发展计划(IRT_17R50);草地农业生态系统国家重点实验室开放课题(SKLGAE201702)

摘　　要：通过不同剂量^12C^6+重离子辐照和航天诱变处理,分析无芒隐子草(Cleistogenes songorica)的种子萌发、幼苗生长及叶绿素荧光参数。结果表明,^12C^6+重离子辐照整体上抑制了无芒隐子草的种子萌发和幼苗生长,且在300 Gy辐照剂量下,无芒隐子草的发芽率、发芽指数、胚根长度以及生物量最低。航天诱变对无芒隐子草的种子萌发也有抑制作用,但提高了幼苗的生物量及株高。^12C^6+重离子辐照和航天诱变均影响无芒隐子草幼苗的最大光合作用能力,降低电子传递的速率。本研究结果可以为^12C^6+重离子辐照和航天技术有效的运用于无芒隐子草诱变育种提供依据。In this study,we systematically analyzed seed germination,seedling growth,and chlorophyll fluorescence parameters of Cleistogenes songorica under different doses of^12C^6+heavy ion irradiation and space mutation.The results showed that^12C^6+heavy ion irradiation inhibited the seed germination and seedling growth of C.songorica.The germination percentage,germination index,radicle length,and biomass were the lowest under the 300 Gy irradiation dose.Space mutation inhibited the seed germination of C.songorica but increased the biomass and plant height of the seedlings.^12C^6+heavy ion irradiation and space mutation affected the maximum photosynthesis ability of seedlings and reduced the rate of electron transfer.The present study provided a basis for the effective application of^12C^6+heavy ion irradiation and space technology to the mutagenesis breeding of C.songorica.

关 键 词：无芒隐子草 航天诱变 12C6+重离子辐照 萌发 幼苗生长 叶绿素荧光 

分 类 号：S543.903.52[农业科学—作物学]