多效唑对盐胁迫下大蒜幼苗生长的影响  

Effect of Paclobutrazol on Growth of Allium sativum Seedlings under Salt Stress

作　　者：刘旭昊[1] 王颖[1] 谭梁静[1] 

机构地区：[1]洛阳师范学院生命科学系,河南洛阳471022

出　　处：《贵州农业科学》2010年第9期42-44,共3页Guizhou Agricultural Sciences

摘　　要：为了解多效唑对盐胁迫下大蒜幼苗生长发育的调节作用,采用不同浓度多效唑(200 mg/L、400 mg/L和600 mg/L)研究了盐(0.8%NaCl)胁迫下大蒜(Allium sativumL.)发芽成苗及其生物量的影响。结果表明:400 mg/L PP333+0.8%NaCl处理株高最低,为5.83 cm;0.8%NaCl处理的株高最高(对照除外,11.84 cm),为13.18 cm;600 mg/L PP333+0.8%NaCl和200 mg/L PP333+0.8%NaCl处理的株高分别为7.26 cm和8.49 cm;但根冠比却是400 mg/L+0.8%NaCl处理最大,为5.98,0.8%NaCl处理最小,为1.19;幼苗叶片叶绿素总含量、丙二醛含量、可溶性糖含量及根系活力较对照均有显著差异。多效唑根施处理能显著降低大蒜幼苗的株高。The growth and biomass of Allium sativum seedlings applied with different concentration of PP333 under salt stress of 0.8% NaCl were determined to study the effect of PP333 on growth of Allium sativum seedlings.The results showed that the plant height of Allium sativum seedlings treated with 400mg/L PP333＋0.8% NaCl,0.8% NaCl,600mg/L PP333＋0.8% NaCl,200mg/L PP333＋0.8% NaCl and CK was 5.83cm,13.18cm,7.26cm,8.49cm and 11.84cm respectively,the root shoot ratio of Allium sativum seedlings treated with 400mg/L PP333＋0.8% NaCl and 0.8% NaCl was 5.98（the highest） and 1.19（the lowest）,and there were significant difference in content of chlorophyll,MDA,soluble sugar and root activity between treatments and CK.PP333 can reduce plant height of Allium sativum seedlings significantly.

关 键 词：多效唑 大蒜 盐胁迫 根施 生长效应 

分 类 号：S663.4[农业科学—果树学]