【摘要】 为探明赤霉素(GA3)对甜菜当年抽苔及光合作用的影响,在甜菜幼苗期,用不同浓度GA3处理茎生长点,分别测定抽苔率及处理后不同天数甜菜叶片的光合速率、蒸腾速率和气孔导度。结果表明:GA3能够不同程度地提高甜菜叶片的光合速率和气孔导度,降低蒸腾速率。甜研7号的最佳处理浓度为40mg/L,甜研8号为45mg/L。更多还原

【Abstract】 To determine the effect of the gibberellin (GA3) on bolting in the first year and photosynthesis of sugar beet,sugar beet growth buds were treated with different concentration of GA3 during the seedling stage. The ratio of bolting,Photosynthetic rate,transpiration rate and stomatal conductance were measured in different days after treatment.The results showed that the optimum concentration of GA3 was 40 mg/L for the Tianyan-7 and 45mg/L for the Tianyan-8.GA3 could improve photosynthetic rate and stomatal conductance,but decrease transpiration rate.更多还原