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(ψ_p)、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。
Uuder osmotic stress , 20 mg/L 2,4-D and 400 mg/L ethrel improved orinhibited 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 thatwith ethrel. The pressure potential(ψ_p)and yield threshold(Y)changed slightly in eitherthe above two treatments or in the control ,while the cell wall extensibility(m)decreasedsignificantly and there was a great significant difference in decreasing trends among thetreatments. Leaf elongation rates(LER)were increased by adding weights to growingregion of maize leaves,while relative elogation rates(RER)were different among thetreatments.
出处
《西北农业大学学报》
CSCD
1995年第1期7-11,共5页
Journal of Northwest Sci-Tech University of Agriculture and Forestry(Natural Science Edition)
基金
国家自然科学基金
黄土高原土壤侵蚀与旱地农业国家重点实验室资助项目