论文部分内容阅读
浓度低于（８００μｇ／ｍＬ）稀土可促进油菜种子萌发的启动。使用浓度为１００μｇ／ｍＬ，１２小时计数其发芽率为２５％，对照为１２％。但浓度高于１０００μｇ／ｍＬ时，会明显抑制萌发。处理浓度低于８００μｇ／ｍＬ时，稀土浸种对油菜种苗根系的生长有明显促进作用。表现为根长、根鲜重增加，根系活力和幼根内源激素—ＧＡｓ、ＩＡＡ含量都得到提高。幼苗子叶中叶绿素含量提高。高浓度（＞１０００μｇ／ｍＬ）对幼苗生长会有抑制作用，正常苗的百分比下降。
Rare earth concentrations below (800μg / mL) can promote seed germination. The use of the concentration of 100μg / mL, 12 hours counting the germination rate was 25%, the control was 12%. However, when the concentration is higher than 1000μg / mL, the germination will be obviously inhibited. When the concentration was lower than 800μg / mL, the soaking of rare earth could obviously promote the root growth of rapeseed seedlings. The root length, root fresh weight, root activity and the content of endogenous hormones -GAs and IAA in young root were all increased. Chlorophyll content in seedling cotyledons increased. High concentrations (> 1000μg / mL) inhibited the growth of seedlings and the percentage of normal seedlings decreased.