溴化锂处理对大豆幼苗生长的影响

Effects of Lithium Bromide Treatment on Seedling Growth of Soybean

为明确溴化锂对大豆的毒害作用,以濮豆129为供试大豆品种,设置0、10-7、10-6、10-5、10-4、10-3、10-2、10-1 mol/L 8个溴化锂浓度处理进行水培试验,通过测定不同浓度溴化锂浸种后大豆幼苗平均株高、鲜质量、根长、叶绿素含量和可溶性蛋白含量,研究了溴化锂对大豆幼苗生长的影响。结果表明:10-7 mol/L溴化锂处理有效促进了大豆幼苗的生长,其平均株高和平均根长分别为43.18cm和4.97cm,叶绿素含量和可溶性蛋白含量分别为2.34mg/g和368.11μg/g;当溴化锂浓度增加到10-1 mol/L,大豆幼苗受到严重损伤,几乎不能生长。总之,溴化锂对大豆幼苗的生长具有低浓度促进、高浓度抑制的效应。

In order to probe into the damage of lithium bromide to soybean, the eliect ot ntmum bromide on soybean was studied with variety Pudou 129 at 8 different concentrations of lithium bromide （0,10^-7,10^-6,10^-5,10^-4,10^-3,10^-2 and 10^-1 mol/L）. The plant height, fresh weight and root length of soybean seedlings in different lithium bromide treatments were tested. Besides, the chlorophyll content and soluble protein content of soybean seedlings also were measured through the spectrometry and Coomassie brilliant blue G-250. The treatment of 10^-7 mol/L of lithium bromide was proved to be advantageous to the seedling growth of soybean. Its plant height and root length were 43.18 cm and 4.97 cm, respectively; Moreover, the chlorophyll content and soluble protein content were 2.34 mg/g and 368.11μg/g, respectively. However, the soybean seedlings were seriously injured when 10^-1 mol/L of lithium bromide was applied to the soybean. The results showed that low concentrations of lithium bromide had a promoting effect on the soy-bean seedling growth and high concentrations, quite the contrary ,had an inhibition effect.