[Objective] High temperature inhibits the germination of lettuce seeds,and the PEG 6000 treatment can promote the germination of lettuce seeds.[Methods] Four varieties of purple lettuce were used to study the effects of PEG 6000 at different concentrations 0(CK),50,100,150,200,250 g/L on the germination rate,germination energy,germination index,radicle length,vivigor index and simplified vigor index.[Results] The results showed that the effect of PEG 6000 for'Bei Zizheng No.1'and'Bei Zi sheng No.2'was more obvious than that of'Beizisheng No.2'and'Bei Zisheng No.4'.The seeds of'Bei Zi sheng No.1'and'Bei Zi sheng No.2'lettuce at 50-150 g/L could significantly increase the temperature tolerance and promote the germination rate of lettuce seeds.The effect for'Bei Zi sheng No.3'was obvious in 50 g/L.In 200 g/L,the vigor index of'Bei Zi sheng No.3'was obvious.The effect for'Bei Zi sheng No.4'was obvious in 250 g/L.[Conclusion]PEG 6000 could promote the germination of'Bei Zi sheng No.1','Bei Zi sheng No.2'and'Beizisheng No.2'in 50-150 g/L;and promote the germinatuon of'Bei Zi sheng No.4'significantly in 250 g/L.
NETL
NSTL
维普
万方数据
