盐胁迫下荠菜种子发芽试验.pdfVIP

安徽农业科学．Journal ofAnhui Agri．Sci．2007，35(35)：11375，11403 责任编辑 金琼琼 责任校对 王森 盐胁迫下荠菜种子发芽试验 郭玲1，周慧杰1，石磊利 (1．塔里木大学植物科技学院，新疆阿拉尔843300；2新疆乌鲁木齐市果蔬研究所，新疆乌鲁木齐830031) 摘要 f目的1为荠菜耐盐资源筛选、种质资源评价、设施抗盐栽培提供理论依据。【方法】采用培养皿发芽法，研究不同浓度的KC1、 Nacl、Ca(NO3)，盐溶液对荠菜种子发芽的影响。【结果150mmo1／L的KC1、NaC1、Ca(N03) 盐溶液胁迫时，荠菜种子的发芽率分别为95．1％、 72．5％、77．0％。50 mmol，IJ的KC1溶液利于荠菜子叶生长和胚根发育。200 mmoI／L KCl胁迫时，荠菜种子发芽率仅为27．8％，根的生长 完全受到抑制。Nacl、Ca(NO3)，溶液随着浓度的增大，不仅抑制子叶生长，同时严重抑制胚根的分化和生长。l50mmol／LNaC1、Ca(NO，) 溶液胁迫时，荠菜种子不能发芽、生根。f结论1Kcl盐溶液对荠菜种子发芽影响最小，其次为NaC1溶液和Ca(NO，) 溶液。 关键词 盐胁迫；荠菜；种子；发芽率 中图分类号 0945．78 文献标识码 A 文章编号 05l7—66l1(2007)35一l1375—0l Germination Experiment of Shepherd s-purse Seeds under Salt Stress GUO Ling et al(College of Plant Science and Technology，Tarim University，Alar，Xinjiang 843300) Abstract 【Objective】The purpose of the study was to provide theoretical basis for salttolerant resourees screening，germplasm resourees evaluation and salt-resistant installation culture of Shepherd S-purse．fMethod1 In the germination test by method of the culture dishes，the influences ofKC1、NaC1、Ca(N03)2 solutionswith different concentrations onthe germination ofShepherd s-purse seedswere studied．【Result】The germination rates of Shepherd S-pulse seeds were 95．1％，72．5％and 77．0％resp．under the stress with 50 mmol／L KC1，NaCl and Ca(N03)2 solutions．50 mmol／L KCl solutions helped to the growth of cotyledon and the development of radicel of Shepherd s-purse．The germination rate of Shepherd S-purse seeds was only 27．8％ under the stress with 200 mmol／L KCl solution．and the growth of root was retrained completely．With the increase of the concentration，NaCl and Ca(NO )2 solutions not only restrained the growth of cotyledon，but alSO seriously restrained the differentiation and growth of radice1．The Shepherd S—purse seeds could not germinate and take roots under the stress with l50 mmol／L NaC1， Ca(N03)2 solution．【Conclusion】KC1 solution has least influence on the