外源激素对碗莲开花及酶活性的影响

以碗莲品种‘红霞’为试验材料,研究了不同质量浓度的生长素(IAA)、赤霉素(GA3)和细胞分裂素(6-BA)对其生长和开花的影响,并测定了其生长过程中超氧化物歧化酶(SOD)、过氧化物酶(POD)、多酚氧化酶(PPO)和过氧化氢酶(CAT)等酶活性的变化。结果表明:经150 mg·L-1IAA处理后显著增加了碗莲的开花数量并促进其提早开花,在该处理下SOD和POD活性在花期显著提高;经150 mg·L-1GA3处理后则延缓落花期,SOD和PPO活性在开花前期显著提高,之后仍保持较高水平;经100 mg·L-16-BA处理后对碗莲的营养生长促进作用最好,主要表现为立叶数、叶面积和叶高绝对生长率均有显著增加,CAT活性在初花期保持较高水平。同时,经50mg·L-1GA3和150 mg·L-16-BA处理后对开花数量和提前开花也有明显的促进作用。

Effects of Exogenous Hormones on Flowering and Enzyme Activity of Bowl Lotus

We used bowl lotus ‘Hongxia ’ as the materials to study the effects of different concentrations of hormone ( auxin, gibberellin and cytokinin ) on the growth and flowering .And we also observed the SOD , POD, PPO and CAT activities during the growth .The treatment of 150 mg· L-1 IAA increased the number of flowers and advanced flower time .The SOD and the POD activities significantly increased during flowering date .The treatment of 150 mg· L-1 GA3 delayed the fading date and the SOD, PPO activities significantly increased during the first-flowering date, then kept the high level .The treat-ment of 100 mg· L-1 6-BA promoted the vegetative growth , and the leaf numbers , the area and the height were increased significantly.The CAT activity kept the high level during the first-flowering date.The treatments of 50 mg· L-1 GA3 and 150 mg· L-1 6-BA also preferably increased the flower numbers and promoted flowering earlier .