不同用量纳米材料对生菜种子发芽的影响

Effects of Different Dosage of Nanomaterials on Germination of Lettuce Seeds

以意大利生菜和红脆香生菜种子为试验材料,研究不同用量石墨相氮化碳纳米材料(0、50、100、150、200 mg/L)对2种生菜种子萌发的影响。结果表明:纳米材料用量在50～150 mg/L时对2种生菜发芽势、发芽率、发芽指数均有促进作用,用量在100 mg/L时,意大利生菜的发芽率、发芽指数最高;用量在150 mg/L时,红脆香生菜发芽势、发芽率、发芽指数最高。纳米材料用量达到200 mg/L时,对生菜种子萌发的促进效果减小,甚至出现抑制萌发的现象。较高用量(150、200 mg/L)的纳米材料可以促进生菜胚根的伸长,用量在150 mg/L时,意大利生菜胚根最长,比对照(CK)增加了24.80%;用量在200 mg/L时,红脆香生菜胚根最长,比对照增加了37.20%。施加纳米材料对生菜胚芽长度的影响不显著。总之,纳米材料用量在50～150 mg/L时,可以促进生菜种子的萌发;较高用量(150、200 mg/L)的纳米材料可以促进生菜种子胚根的伸长;施加纳米材料对胚芽长的影响不显著。

For the purpose of studying the effects of different dosage of nanomaterials(graphite phase carbon nitride)on the germination of lettuce seeds,five treatments(0,50,100,150 mg/L and 200 mg/L)were set up,and Italian and Hongcuixiang lettuce were chosed as materials.The results showed that when the amount of nanomaterials was 50~150 mg/L,the germination potential,germination rate and germination index of the two lettuces were promoted.The germination rate and germination index of Italian lettuce were the highest treated by 100 mg/L.When the amount was 150 mg/L,the germination potential,germination rate and germination index of Hongcuixiang lettuce were the highest.When the amount of nanomaterial reached 200 mg/L,the promoting effect on the germination of lettuce seeds was reduced and even appeared the phenomenon of inhibiting germination.Higher dosage(150,200 mg/L)of nanomaterials could promote root elongation.When the amount was 150 mg/L,the radicle length of Italian lettuce was the largest,which was increased by 24.80%compared with the control.When the amount was 200 mg/L,the radicle length of Hongcuixiang lettuce was the largest,which was increased by 37.20%compared with the control.The effect of applying nanomaterials on the length of the plumule was not obvious.In conclusion,when the amount of nanomaterials was 50~150 mg/L,the germination of the lettuce seeds were promoted.Higher dosage(150,200 mg/L)of nanomaterials could promote radicle elongation.The effect of applying nanomaterials on the length of the plumule was not obvious.