[Objective] The research aimed to study the effects of colchicines soaking on growth of A. Sativum "Baodi Garlic" bulblets. [Method] A. Sativum "Baodi Garlic" bulblets were soaked in colchicines which concentrations was 0.1% and 0.2 % at 0, 6, 12, 24 and 48 h respectively, and the water treatment was the control. The plant height, cauloid length, cauloid diameter and parameters of stomata were de termined and evaluated after bulblets sowing 25 and SO days. [Result] After A. Sativum "Baodi Garlic" bulblets sowing 25 days, the plant height of control was the highest, the cauloid was the shortest when using 0.2% colchicines soaking 24 h, and the cauloid diameter was the biggest when using 0.2% colchicines soaking 6 h. After A. Sativum "Baodi Garlic" bulblets sowing 50 days, the plant height was the lowest when using 0. 2% colchicines soaking 12 h, the cauloid was the longest when using 0.2% colchicines soaking 6 h, and the cauloid diameter was the biggest when using 0.2% colchicines soaking 24 h. In addition, after A. Sativum " Baodi Garlic" bulblets sowing 50 days, the stomata lengh, width and density were all the smallest when using 0. 1% colchicines soaking 6 h. [ Conclusion] The colchicines has inhibitive effects on the early growth of A. Sativum "Baodi Garlic" bulblets, but it gradually decreases along with extension of growing time.%[目的]研究秋水仙素浸泡宝坻大蒜(Allium saivum‘Baodi Garlic’)气生鳞茎后,对其生长的影响.[方法]设置秋水仙素浓度分别为0.1%、0.2%和浸泡时间分别为6、12、24、48h,以清水处理为对照.测量气生鳞茎播种25、50d后株高、假茎长和假茎直径,并对气孔形态指标进行观测.[结果]宝坻大蒜气生鳞茎播种25 d后,对照的株高最高,浓度0.2%秋水仙素浸泡24h处理的假茎最短,浓度0.2%秋水仙素浸泡6h处理的假茎直径大.播种50d后,浓度0.2%秋水仙素浸泡12 h处理的株高最矮,浓度0.2%秋水仙素浸泡6h处理的假茎最长,浓度0.2%秋水仙素浸泡24h处理的假茎直径最大.另外,播种50d后,浓度0.1%秋水仙素浸泡6h处理的叶片气孔长度、气孔宽度和气孔密度均为最小.[结论]秋水仙素对宝坻大蒜气生鳞茎早期生长有抑制作用,但这种抑制作用随着生长时间的延长而逐渐减弱.
展开▼