【摘要】 本文利用水培法进行ＬａＣｌ３对烟草幼苗生长作用效果的研究。试验结果表明，适宜质量浓度的ＬａＣｌ３溶液（５～５０ｍｇ／Ｌ）能够促进烟草幼苗的生长，增加株高，扩大叶片面积，根系发达，有利于干物质积累。同时ＬａＣｌ３还能提高叶绿素的含量，改变光合色素比例，降低过氧化物酶及吲哚乙酸氧化酶活性。高质量浓度ＬａＣｌ３（１００ｍｇ／Ｌ）溶液则抑制烟草植株的生长。更多还原

【Abstract】 This paper reports the effect of LaCl 3 on growth of tobacco plants by water culture.The experimental results showed that the optimum concentration of LaCl 3 (5～50mg/L) can promote the growth of tobacco plants,increase plant length and leaf area and stimulate the growth of root system and accumulation of dry matter.Besides,LaCl 3 incresed photosynthetic pigment content,altered the proprtion of pigment,reduced the activities of peroxidase and IAA oxidase.更多还原