| 摘要: |
| 渗透胁迫下２０ｍｇ／Ｌ２，４－Ｄ和４００ｍｇ／Ｌ的乙烯利能不同程度地促进或抑制玉米叶片的延伸生长（ＬＥＲ）。随着胁迫程度的加强，２，４－Ｄ处理的ＬＥＲ下降迅速，而乙烯利处理的ＬＥＲ下降较为缓慢；无论是上述２种处理还是对照，玉米叶片生长部位膨压（ψp）、细胞壁屈服阈值（Y）变化不大，而细胞壁的延伸性能（m）则呈明显下降趋势且处理间差异很大。随着叶片生长部位外施重力的增加，ＬＥＲ逐渐升高，但不同处理间的相对生长速率（ＲＥＲ）仍有差异。 |
| 关键词: 玉米，2，4－D，乙烯利，LER，细胞壁性质，渗透胁迫 |
| DOI： |
| 分类号:S143.8 |
| 基金项目:国家自然科学基金及黄土高原土壤侵蚀与旱地农业国家重点实验室资助项目的一部分 |
|
| Effects of 2,4-D and Ethfel on Elongation Growth and Properties of Cell Wall of Maize Leaf Under Osmotic Stress |
|
Zhang Xiao Jing Jiahai,Zhang Xiao Jing Jiahai
|
| Abstract: |
| Under osmotic stress,20mg/L 2,4-D and 400 mg/L ethrel improved or
inhibited the leaf elongation rates (LER) of maize leaves to some extent respectively.
With an increase in stress degree,LER treated with 2,4-D decreased faster than that
with ethrel.The pressure potential (ψp) and yield threshold (Y) changed slightly in either
the above two treatments or in the control,while the cell wall extensibility (m) decreased
significantly and there was a great significant difference in decreasing trends among the
treatments.Leaf elongation rates (LER) were increased by adding weights to growing
region of maize leaves,while relative elogation rates (RER) were different among the
trestnlents。 |
| Key words: maize, 2,4-D,ethrel,LER,cell wall property,osmostic stress |
