Ca^(2+)对NaCl胁迫下番茄种子萌发和幼苗的影响  

Efects of Ca^(2+) on Seed Germination and Seedling Growth of Tomoto under NaCl Stress

作　　者：李春燕[1,2] 张光勇 王维行 袁寒[1,2] 张虹[1,2] 

机构地区：[1]红河学院生命科学与技术学院,云南蒙自661100 [2]云南省高校农作物优质高效栽培与安全控制重点实验室 [3]云南省红河热带农业科学研究所

出　　处：《农业研究与应用》2015年第2期6-9,共4页Agricultural Research and Application

摘　　要：采用培养皿发芽法和沙培盆栽法,以150mmol/LNaCl模拟盐胁迫条件,分别研究了外源Ca2+对盐胁迫下番茄种子萌发和幼苗生长的影响。结果表明:较低浓度的Ca2+(5~20mmol/L)总体上对盐胁迫下番茄种子的发芽和幼苗的生长有明显的促进作用,丙二醛(MDA)的含量显著降低;较高浓度(>20mmol/L)的Ca2+,抑制了种子的发芽和幼苗的生长,MDA含量极显著上升;Ca2+浓度在0~25mmol/L范围内,对盐胁迫条件下生长的番茄体内过氧化物酶(POD)活性影响无显著性差异。The effects of Ca2＋ on seed germination and seedling growth of tomato under 150 mmol/L NaCI stress were studied by the experiment of petri dish germination and sand culture. The results showed that lower concentrations of Ca2＋ （5～20 mmol/L） obviously promoted the seed germination and seedling growth under NaC1 Stress, malonyldialdehyde （MDA） de- creased significantly; but higher concentrations of Ca2＋ （〉20 mmol/L） inhibited the seed ger- mination and seedling growth, malonyldialdehyde （MDA） increased substantially; when the concentrations of Ca2＋ was in the range of 0～25 mmol/L, the effects of Ca2＋ on POD activity of tomato had no significant differences under NaCI stress.

关 键 词：CA2+ NACL胁迫 番茄 种子萌发 幼苗生长 

分 类 号：S641.2[农业科学—蔬菜学]