GA_3对西洋杜鹃花期及生理生化指标的影响

Effects of GA_3 on Flowering Period and Physiological and Biochemical Indexes of Rhododendron hybridum

以西洋杜鹃粉红品种为材料,研究了用不同浓度的GA_3处理对其花期及部分生理生化指标的影响,结果表明:不同浓度GA_3处理均能促进西洋杜鹃提前花期,延缓花瓣衰老,提高观赏品质。其中以1500 mg/L GA_3处理的效果最好,花期提前13 d,提高植物叶片与花瓣碳水化合物含量、花瓣SOD活性与花色素苷含量,降低花瓣MDA含量。

The effects of different concentrations of gibberellins （ GA3 ） treatments on the flowering period and some physio- logical and biochemical indexes of Rhododendron hybridum pink variety were studied. The results showed that the treatments with different concentrations of GA3 all could promote the flowering earlier, prolong the senescence of petals, and improve the flower ornamental quality of Rhododendron hybridum. Among all treatments, the 1500 mg/L GA3 treatment obtained the best effects ： the flowering period was advanced by 13 days; the carbohydrate content in leaves and petals, and the superoxide dismutase （SOD） activity and anthocyanin content in petals were increased; the MDA content in petals was decreased.