丹桂叶片越冬期气孔运动的观察(简报)

Observations on the Characteristics of Stomatal Movement of Orange Osmanthus Leaves during Overwintering

越冬期间丹桂叶片气孔运动日变化为单峰态,与秋季呈双峰态不同。阴天,气孔开张率、开度与光强、气温有一定正相关性,但晴天只与光强呈明显正相关。越冬期间GA_3明显地促进气孔开张率,降低气孔全部张开的照度阈值,而IAA的促进作用比GA_3差。