LaCl_(3)对烟草幼苗生长的影响  

Effect of LaCl_(3) on the Growth of Tobacco Seedlings

作　　者：陈刚才[1,2] 甘露[2] 王仕禄[2] 万国江[2] 吴沿友[2] 

机构地区：[1]重庆市环境科学研究院生态室,重庆400020 [2]中国科学院地球化学研究所环境地球化学国家重点实验室,贵州贵阳550002

出　　处：《稀土》2000年第6期8-10,13,共4页Chinese Rare Earths

基　　金：国家自然科学基金资助项目(49503050)

摘　　要：本文利用盆栽实验研究了 L a Cl3对烟草幼苗的生物效应。在烟苗长到 3～ 4片叶时 ,用不同浓度的 L a-Cl3溶液喷施 ,实验结果表明 :2 5～ 75 m g/ L L a Cl3的溶液均能促进烟苗的生长 ,增加株高、单株干重和根干重 ,提高根 /冠比 ,增加叶片的叶绿素含量和提高叶片的净光合速率。处理的烟苗抗寒性也有所增强。烟苗在 0～ 2℃的低温下 ,原生质结构破坏的程度减轻 ,外渗物质的量减少 ,处理的比对照的电导率减少 0 .0 1～ 0 .18× 10 - 4 s/ m。喷 L a Cl3溶液的烟苗叶片总含水量有所下降 ,但束缚水含量提高 。Effects of LaCl 3 on tobacco seedling and its physiological basis were studied.The results showed that the optimum concentration of LaCl 3 (25~75mg/L)can promote the growth of tobacco seedling and increase the plant length, dry mass per plant and root dry mass.The chlorophyll content,the net photosynthetic rate and the resistibility of treated seedlings were also increased.Although no significant difference between treated and control,the water content of leaves decreased to some extent,and the bound water content raised obviously and the transpiration decreased obviously.

关 键 词：LaCl_(3) 烟草幼苗 生物效应 

分 类 号：S572.062[农业科学—烟草工业] S143.72[农业科学—作物学]