Michigan State University/Energy Research and Development Administration Plant Research Laboratory, Michigan State University, East Lansing, Michigan 48824.
Plant Physiol. 1976 Jan;57(1):115-21. doi: 10.1104/pp.57.1.115.
The degree of stomatal sensitivity to CO(2) was positively correlated with the content of abscisic acid of leaves of Xanthium strumarium grown in a greenhouse and then transferred for 24 hours or more to a cold (5/10 C, night/day) or a warm growth chamber (20/23 C). This correlation did not exist in plants kept in the greehouse continuously (high abscisic acid, no CO(2) sensitivity), nor in plants transferred from the cold to the warm chamber (low abscisic acid, high CO(2) sensitivity). The abscisic acid content of leaves was correlated with water content only within narrow limits, if at all. At equal water contents, prechilled leaves contained more abscisic acid than leaves of plants pretreated in the warm chamber. There appear to be at least two compartments for abscisic acid in the leaf.
在温室中生长的苍耳的叶片中,脱落酸含量与叶片的气孔对 CO2 的敏感度呈正相关。将苍耳在温室中连续培养(高脱落酸,无 CO2 敏感度),或转移到寒冷(5/10°C,夜间/白天)或温暖生长室(20/23°C)24 小时以上,这种相关性并不存在。在寒冷环境下转移到温暖环境中的植株(低脱落酸,高 CO2 敏感度)也是如此。叶片中的脱落酸含量仅在很窄的范围内与含水量相关,如果有的话。在同等含水量的情况下,预冷的叶片比在温暖环境中预处理的叶片含有更多的脱落酸。苍耳的叶片中似乎至少有两个脱落酸的隔室。