含羞草叶子提取物对常见农作物种子萌发生长的抑制作用

观察了含羞草叶子提取物对孟加拉常见农作物种子萌发生长的抑制作用.实验在27-30℃的室温和24小时的光照条件下进行.结果表明：不同浓度的含羞草叶子提取物明显影响所选的植物种子根,茎和侧根的延长和生长.生物学测定表明：高浓度（50%-100%）的提取物有较强的抑制作用.而低浓度 （10%-25%） 的提取物的抑制作用较弱.研究还显示,提取物对植物根和侧根的抑制作用比对种子萌发和茎的生长抑制作用更显著.

Inhibitory effects of <Emphasis Type="Italic">Albizia lebbeck</Emphasis> leaf extracts on germination and growth behavior of some popular agricultural crops

An experiment was conducted to observe the inhibitory effects of the leaf extracts derived from Albizia lebbeck (L.) Benth. on germination and growth behavior of some popular agricultural crops (receptor) of Bangladesh. Experiments were set on sterilized petridishes with a photoperiod of 24 h at room temperature of 27–30°C. The effects of the different concentrations of aqueous extracts were compared to distil water (control.). The aqueous extracts of leaf caused significant inhibitory effect on germination, root and shoot elongation and development of lateral roots of receptor plants. Bioassays indicated that the inhibitory effect was proportional to the concentrations of the extracts and higher concentration (50%–100%) had the stronger inhibitory effect whereas the lower concentration (10%–25%) showed stimulatory effect in some cases. The study also revealed that, inhibitory effect was much pronounced in root and lateral root development rather than germination and shoot growth. Electronic supplementary material is available in the online version of this article at http://dxdoi.org/10.1007/s11676-007-0025-9 Biography: Mohammad Belal Uddin (1976–), male, Assistant Professor in Department of Forestry, School of Agriculture and Mineral Sciences, Shahjalal University of Science and Technology, Sylhet 3114, Bangladesh.