摘要
以中单509玉米种子为试验材料,用不同浓度的聚乙二醇溶液(PEG)、水杨酸溶液(SA)、0.1%Zn SO4、0.1%Cu SO4、0.1%Na2SO4、1 mg/L Na2S2O3、100 mg/L Ca Cl2和100 mg/L KCl溶液对种子进行引发处理。采用标准发芽试验和砂培试验,以15%的PEG模拟盐胁迫,研究不同药剂引发处理对干旱胁迫下玉米种子萌发及幼苗生长的影响。结果表明:干旱胁迫下,用5%PEG引发处理玉米种子效果最好,和对照相比,显著提高了种子的发芽率,苗高、根长、植株干重和叶绿素含量,降低电解质的渗出率,最终提高玉米芽苗期的耐旱性。
Seed of Zhongdan 509 maize （Zea mays L. ） was primed with PEG and SA of different concentra-tions,0.1% zinc sulphate,0. 1% copper sulphate,0. 1% sodium sulphate, 1 mg/L sodium thiosulfate, 100mg/L calcium chloride and 100 mg/L potassium chloride. The primed seeds were subjected to drought stress of15% polyethylene glycol （PEG） 6000 in standard germination test and a sand culture experiment. The effectof the seed priming with different agents on seed germination and seedling growth under water deficit stresswere investigated. The treatment of 5% PEG had the best effects among all treatments. The growth of seedlingwas inhibited while the accumulation of dry weight was reduced. Compared with control under the water deficitstress, seeds primed with 5% PEG had higher emergence rate, higher height of seedling and length of roots,higher dry weight of seedling and the content of chlorophyll, reducing the rate of electrolyte leakage, improvingthe drought resistance of maize at germination and seedling stages.
出处
《种子》
CSCD
北大核心
2014年第11期43-46,共4页
Seed
基金
天津市农业科技成果转化与推广项目(编号:201204070)
天津农学院科技发展基金项目
关键词
玉米
种子引发
干旱胁迫
种子萌发
幼苗生长
maize
seed priming
water deficit stress
seed germination
seedling growth
