硒浸种对番茄种子萌发的影响

The Effect of Selenium on Seed Germination of Lycopersicon esculentum

以番茄(Lycopersicon esculentum Mill)种子为研究材料,设置了7个硒(Selenium)浸种浓度(0、0.5、2.0、4.0、6.0、8.0、10.0 mg·L-1),研究了不同浓度的硒浸种处理对番茄种子萌发的影响。结果表明,低浓度的硒处理(0～4.0 mg·L-1)对番茄种子的萌发有促进作用。在硒的浓度为4.0 mg·L-1时,其发芽率最大,种子萌发第7天时的芽鲜重、根鲜重、芽长、根长、芽干重和根干重也达到了最大值;而高浓度的硒处理(>4.0 mg·L-1)则表现为一定的抑制作用。

The study dealt with the efect of Selenium on germination of Lycopersicon esculentum seeds in different concen-trations of Se solution（0,0.5,2.0,4.0,6.0,8.0 and 10.0 mg·L^-1）.The results showed that the germination rate of the soaked seeds increased when the concentration of Se solution was from 0 to 4.0 mg·L^-1.The germination rate of the seeds reached the highest at the concentration of 4.0 mg·L^-1.The fresh weight,dry weight and length of roots and buds at the seventh day all reached the highest at this concentration.High concentration of Se treatment（〉4.0 mg·L^-1） restrained the seeds germination.