干旱胁迫对寒地水稻不同种质资源萌发特性及幼苗生长的影响  

Effects of Drought Stress on Germination Characteristics and Seedling Growth of Different Rice Germplasm Resources in Cold Region

作　　者：丁国华[1] 白良明[1] 曹良子 周劲松[1] 王彤彤[1] 洛育[1] 夏天舒[1] 杨光[1] 谢婷婷[1] 刘凯[2] 姜辉[2] 陈磊[2] 王荣升 李坤[3] 王雪扬 殷大伟[5] 湛立伟 孙世臣[1] DING Guohua;BAI Liangming;CAO Liangzi;ZHOU Jinsong;WANG Tongtong;LUO Yu;XIA Tianshu;YANG Guang;XIE Tingting;LIU Kai;JIANG Hui;CHEN Lei;WANG Rongsheng;LI Kun;WANG Xueyang;YIN Dawei;ZHAN Liwei;SUN Shichen(Institute of Tillage and Cultivation,Heilongjiang Academy of Agricultural Sciences,Harbin 150086,China;Heilongjiang Academy of Agricultural Sciences,Harbin 150086,China;Institute of Biotechnology,Heilongjiang Academy of Agricultural Sciences,Harbin 150086,China;Soybean Research Institute,Heilongjiang Academy of Agricultural Sciences,Harbin 150086,China;Heilongjiang Bayi Agricultural University,Daqing Heilongjiang 163000,China;Zhejiang Wuwangnong Seeds Shareholding Co.,Ltd,Hangzhou 310026,China)

机构地区：[1]黑龙江省农业科学院耕作栽培研究所/黑龙江省水稻品种改良与遗传育种工程技术研究中心/黑龙江省农业科学院开放实验室,哈尔滨150086 [2]黑龙江省农业科学院,哈尔滨150086 [3]黑龙江省农业科学院生物技术研究所,哈尔滨150086 [4]黑龙江省农业科学院大豆研究所,哈尔滨150086 [5]黑龙江八一农垦大学,黑龙江大庆163000 [6]浙江勿忘农种业有限公司,杭州310026

出　　处：《种子》2020年第11期38-43,共6页Seed

基　　金：国家重点研发计划项目(2017 YFD 0300406);优质水稻适应性优选与提质增效技术研究与示范(GA 20 B 101);国家重点研发计划省级资助项目(GX 18 B 050);国家水稻产业技术体系哈尔滨综合试验站(CARS-01-57);黑龙江省自然科学基金项目(C 2017061);黑龙江省农业科学院创新工程项目(2017 SJ 033,2019 YYYF 014,2020 FJZX 002)。

摘　　要：以创制的寒地水稻新种质及栽培品种为实验材料,采用不同浓度(0、15%、20%)的聚乙二醇(PEG-6000)模拟干旱胁迫,研究各材料种子发芽率、发芽势、发芽指数及幼苗生长状况相关指标。结果表明,在本实验条件下,与对照相比,15%PEG-6000处理对各材料发芽率均没有显著影响。除龙稻18(LD 18)、绥粳18(SJ 18)、943外,其余材料在20%PEG-6000处理下发芽率显著降低。各干旱处理均极显著降低各材料发芽指数,但对各材料发芽势影响不同。各材料在干旱处理下(15%PEG-6000)生长受抑,根干重及茎干重显著降低,但根系性状响应干旱的表型不同。创制的节水水稻材料通过增大根冠比适应干旱胁迫,与栽培品种应对干旱胁迫的机制不同。In this study,the newly created rice germplasms in cold region and cultivars were used as experimental materials to investigate the germination rate,germination potential,germination index and related indexes of seedling growth under simulated drought stress with PEG-6000 of 0,15%and 20%concerntrations.The results showed that 15%PEG-6000 treatment had no significant effect on the germination rate of all the materials compared with the control group.Except for rice varieties Longdao18(LD 18),Suijing 18(SJ 18)and 943,the germination rate of other materials was significantly reduced under 20%PEG-6000 treatment.The germination index of each material was significantly reduced in 3 drought treatments,but the effect on the germination potential of each material was slightly different.Under drought treatment with 15%PEG-6000,the growth of each material was inhibited,and the root dry weight and stem dry weight were significantly reduced.Simultaneously,the phenotypes of root characteristics in response to drought treatment were different.Also,The newly created water-saving rice were designed to adapt to drought stress by increasing the root-cap ratio,which was different from the mechanism of cultivated varieties in responding to drought stress.

关 键 词：寒地水稻 种质资源 聚乙二醇 萌发特性 

分 类 号：S511[农业科学—作物学]