《植物生理学报》 2012, 48(4): 403-407

生长素类化合物及6-苯甲基腺嘌呤对拟南芥主根生长的抑制效应比较

李晓峰^1,2, 孟广目³, 梁城磊¹, 李丹¹, 张瑞婷¹, 牟长军¹, 陈倪¹, 刘恒^1,*

1兰州大学生命科学学院, 兰州730000; 2中国科学院寒区旱区环境与工程研究所, 兰州730000; 3河南省信阳高级中学, 河南

通信作者：刘恒；E-mail: xfli@lzu.edu.cn；Tel: 0931-8915601

摘　要：

为更好的研究生长素类化合物及6-苯甲基腺嘌呤(6-BA)对细胞分裂和细胞伸长的影响, 以拟南芥主根为材料, 从组织学水平比较了IAA、NAA、2,4-D和6-BA对拟南芥主根分生区和伸长区的抑制效应, 发现IAA和NAA效果是相似的, 可以通过促进细胞分裂显著增加根分生区长度, 但也显著缩短主根伸长区长度, 而2,4-D和6-BA则通过抑制细胞分裂来显著缩短根分生区长度, 同时也显著缩短根伸长区的长度。

关键词：生长素类化合物; 6-苯甲基腺嘌呤; 拟南芥; 根分生区; 根伸长区

收稿：2012-02-22   修定：2012-03-08

资助：国家自然科学基金(30970234)、教育部博士点基金(200807300014)和兰州大学中央高校基本科研业务费专项资金(lzujbky-2010-60)。

Comparison of the Inhibit Effects of Auxins and 6-Benzyladenine on Arabidopsis Main Root Growth

LI Xiao-Feng^1,2, MENG Guang-Mu³, LIANG Cheng-Lei¹, LI Dan¹, ZHANG Rui-Ting¹, MU Chang-Jun¹, CHEN Ni¹, LIU Heng^1,*

¹School of Life Sciences, Lanzhou University, Lanzhou 730000, China; ²Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China; ³Xinyang Senior Middle School of Henan Provice, Xinyang, Henan 464000, China

Corresponding author: LIU Heng; E-mail: xfli@lzu.edu.cn; Tel: 0931-8915601

Abstract:

To study the effect of auxins and 6-BA on cell divison and cell elongation, we compared the inhibit effects of IAA, NAA, 2,4-D and 6-BA on Arabidopsis main root development. We found that IAA and NAA has similar effects on root development that can increases the length of root meristem zone through promotes cell division and decreases the length of root elongation zone, but 2,4-D and 6-BA decreases both the length of root meristem zone through inhibit cell division and root elongation zone.

Key words: auxins; 6-benzyladenine; Arabidopsis; root meristem zone; root elongation zone