ऑक्सीजन इस प्रोड्यूस्ड ड्यूरिंग फोटोसिंथेसिस इन द प्रेजेंट ऑफ लाइट पैसेज
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Measurements of photosynthetic processes in hydrophytes mostly involve photosynthometers, which capture the escaping gas for subsequent analysis The most common method to detect changes in the rate of photosynthetic processes is to count the series of escaping gas bubbles. The emerging bubbles are either simply counted or they are recorded using light barriers, which is very difficult because of their small size and often varying ascent rate. The gas bubbles generated during photosynthesis by aquatic plants produce distinctive sound pulses when leaving the plants. These acoustic side effects enable completely new and highly accurate measurements. The frequency and reaction time changes of the pulses caused by external influences are therefore accurately detectable. The precise time measurements enable registering and evaluating the curves as reactions to changes in physical or chemical environmental conditions. We show that such acoustic analyses open completely new research opportunities for plant physiology.
In photosynthesis of submerse water plants Oxygen emission occurs in form of bubbles which are released from the stomata or small openings caused by injuries. Usually the oxygen discharge is in form of regular bubble series. By the observation that at the moment of escape the oxygen bubble emits a short single sound pulse the development of a new measuring method was enabled which offers completely new research options. So far the bubbles have only been counted with the stopwatch. With standard acoustic equipment for recording an analysis the time intervals from bubble to bubble can be measured accurately. Thereby the sound pulse series of extremely small bubbles can be registered. Changes in speed of oxygen emission (resp. sound pulse frequency) as consequences of changes in physical (e.g. light intensity, light quality, temperature) and chemical (e.g. environmental pollutants) conditions could be measured and registered with highest precision over a long distance and presented in form of diagrams.
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