Stomatal responses to light and CO2 in greening wheat leaves |
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Authors: | Ogawa Teruo |
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Institution: | Laboratory of Plant Physiology, The Institute of Physical and Chemical Research (Rikagaku Kenkyusho) Wako-shi, Saitama 351, Japan |
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Abstract: | The development of two types of stomatal transpiration, oneinduced by light (light-induced stomatal transpiration) andthe other induced by CO2-free air in the dark (CO2-sensitivestomatal transpiration), in greening leaves of wheat (Triticumaestivum L.) was studied in respect to the development of CO2uptake and chlorophyll formation. Light-induced stomatal transpirationwas not observed at all in etiolated leaves and was generatedafter 3 hr of illumination for greening, when the activity ofCO2 uptake was generated. CO2-sensitive stomatal transpirationwas low in etiolated leaves and started to increase at the sametime during greening as the start of CO2 uptake. The activitiesof both light-induced and CO2-sensitive stomatal transpirationincreased as the activity of CO2 uptake and the chlorophyllcontent increased. Pre-illumination of etiolated leaves for1 min followed by 4 hr of dark incubation eliminated the lagfor the development of the two types of stomatal transpirationand CO2 uptake. (Received September 4, 1978; ) |
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