Munzuroglu Omer, Zengin Fikriye Kirbag
Department of Biology, Faculty of Science, Firat University, Elazig-23119, Turkey.
J Environ Biol. 2006 Oct;27(4):671-7.
Effect of cadmium on barley seeds treated with kinetin and gibberellic acid was investigated. As usual, cadmium has inhibited seed germination, and showed important inhibitory effects on roots and coleoptile growth after germination. In general, increase in cadmium concentration caused a greater inhibition of germination, root and coleoptile growth. The adverse effect of cadmium on root and coleoptile growth was more pronounced than that on germination. While testa was pierced by radicle (an indication of germination), no root or coleoptile development was observed above at concentration of 3-9.5 mM CdCl2xH2O. Low concentrations of cadmium have inhibited the root growth more than it did on coleoptile growth. Treatment of seeds with gibberellic acid and kinetin did not show any significant difference on the effect of cadmium in germination. However, inhibition of coleoptile elongation by cadmium has decreased a very much after kinetin application. The same result, although with lower rates when compared to kinetin, has been obtained for GA3 as well. In addition, the inhibitory effect of cadmium on root growth increased even more after kinetin application. The results have been found statistically significant through the least significant different (LSD) test at levels ofp < 0.05 and p < 0.01.
研究了镉对用激动素和赤霉素处理过的大麦种子的影响。和往常一样，镉抑制了种子萌发，并对萌发后的根和胚芽鞘生长表现出重要的抑制作用。一般来说，镉浓度的增加对萌发、根和胚芽鞘生长的抑制作用更大。镉对根和胚芽鞘生长的不利影响比对萌发的影响更明显。当胚根穿透种皮（萌发的标志）时，在3-9.5 mM CdCl₂·H₂O浓度下未观察到根或胚芽鞘的发育。低浓度的镉对根生长的抑制作用比对胚芽鞘生长的抑制作用更大。用赤霉素和激动素处理种子对镉在萌发方面的影响没有显示出任何显著差异。然而，在施用激动素后，镉对胚芽鞘伸长的抑制作用大大降低。对于GA₃也得到了相同的结果，尽管与激动素相比比例较低。此外，在施用激动素后，镉对根生长的抑制作用甚至进一步增强。通过最小显著差数（LSD）检验，在p < 0.05和p < 0.01水平上发现结果具有统计学意义。
