Some Effects of Abscisic Acid and Water Stress on Stomata of Vicia faba L.
Some Effects of Abscisic Acid and Water Stress on Stomata of Vicia faba L.
复制标题
脱落酸和水分胁迫对蚕豆气孔的影响。
DOI：
10.1093/jxb/29.1.175
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发表时间：
1978
影响因子：
6.9
通讯作者：
W. Davies
中科院分区：
文献类型：
--
作者：
W. Davies
在实验室的塑料帐篷下种植的蚕豆幼苗在整个生长过程中要么浇水很好，要么在进行实验处理之前接受几天的水分胁迫处理。测定了进一步的水分胁迫处理或ABA水溶液对这些植物气孔的影响。前期水分胁迫植物的气孔比水分充足的植物的气孔对ABA通过叶柄通过蒸腾流喷施并喷施到叶表面的反应更为敏感。前期水分胁迫植物的气孔比水分充足的植物的气孔关闭更快，程度更大。当直接应用于从这两组植物上移除的表皮碎片时，这种激素只有很小的效果。经过水分胁迫预处理的植物的气孔对随后一段时间的水分胁迫的敏感性低于之前水分充足的植物的气孔。气孔对水分胁迫的适应可能与植物激素平衡的变化有关。
Vicia fabaseedlings grown under a plastic tent in the laboratory were either watered well throughout their growth period or were subjected to a water stress treatment for several days prior to an experimental treatment. The effects of a further water stress treatment or an application of an aqueous solution of abscisic acid (ABA) on the stomata of these plants were determined. Stomata of previously water-stressed plants proved to be more sensitive than stomata of well watered plants to ABA applied through the petiole via the transpiration stream and sprayed onto leaf surfaces. Stomata of previously water-stressed plants closed more rapidly and to a greater degree than stomata of well watered plants. The hormone had only a small effect when applied directly to epidermal fragments removed from both groups of plants. Stomata of plants which had received a water stress pretreatment were less sensitive to a subsequent period of water stress than were stomata of previously well watered plants. It is proposed that stomatal adaptation to water stress may be related to changes in the hormonal balance of the plant.