不同类型水稻芽期的耐盐性差异  

Analysis on the difference of salt tolerance of different types of rice at budding stage

作　　者：魏征 邹燕 陈澎军 韩继军 缪源卿 易镇邪[1] 屠乃美[1] WEI Zheng;ZOU Yan;CHEN Pengjun;HAN Jijun;MIAO Yuanqing;YI Zhenxie;TU Naimei(College of Agronomy,Hunan Agricultural University,Changsha,Hunan 410128,China;Institute of Geochemical Exploration and Marine Geological Survey ECE,Nanjing,Jiangsu 210007,China)

机构地区：[1]湖南农业大学农学院,湖南长沙410128 [2]地球化学勘查与海洋地质调查研究院,江苏南京210007

出　　处：《湖南农业大学学报（自然科学版）》2021年第3期254-261,316,共9页Journal of Hunan Agricultural University(Natural Sciences)

基　　金：湖南省科技重大专项(2018NK1010)。

摘　　要：对43份水稻材料进行芽期耐盐性比较试验,用0、0.2%、0.4%和0.6%共4个浓度的Na Cl溶液模拟盐胁迫,对芽期的发芽势、发芽率、根长、芽长、主根数、根鲜质量、芽鲜质量、根干质量、芽干质量和电导率等进行测定分析。结果表明:随着盐浓度的增加,不同水稻材料的根长、芽长、根数、发芽势、发芽率、根鲜质量、芽鲜质量、根干质量和芽干质量均呈下降趋势,而芽的电导率呈上升趋势;同一盐浓度处理下,不同水稻材料的耐盐表现有差异。通过综合分析,筛选出芽期耐盐性强的2个常规籼稻(R2803和YW01);耐盐性较强的6个材料,其中3个常规粳稻(淮稻5号、扬粳3491和越光),2个常规籼稻(黄华占和R889)和1个籼型杂交稻(椰香A/海品12)。Comparison test of salt tolerance on 43 rice materials at budding stage were performed.Four NaCl solutions,0,0.2%,0.4%and 0.6%were used to simulate salt stress,and the germination potential and rate of germination were measured.Root length,shoot length,number of main roots,fresh weight and dry weight of roots and shoots and electrical conductivity were collected and analyzed.The results showed that with the increase of salt concentration,the roots and shoots length,root number,germination potential,germination rate and fresh weight and dry weight of roots and shoots of different rice materials showed a downward trend,while the electrical conductivity of the shoot showed an upward trend;under the same salt concentration treatment,the salt tolerance performance of different rice materials were different.Through comprehensive evaluation,six materials showed strong salt tolerance,including 3 conventional japonica rice(Huaidao No.5 rice,Yanggeng 3491 and Koshihikari),2 conventional indica rice(Huang Huazhan and R889),1 indica hybrid rice(Yexiang A/Haipin 12),and two conventional indica rices(R2803 and YW01)showed stronger salt tolerance at the bud stage.

关 键 词：水稻 芽期 盐胁迫 耐盐性 相对盐害率 

分 类 号：S511.041[农业科学—作物学]