Photosynthetica 2021, 59(2):245-255 | DOI: 10.32615/ps.2021.015
Application of fast light-readapted plants for measurement of chlorophyll fluorescence and P700 light absorption with the RLC method
- Institute of Plant Physiology RAS, 35 Botanicheskaya St., 127276 Moscow, Russia
The rapid light curve method is a time-saving approach to the measurement of photosynthetic processes over a wide spectrum of light intensities. The adaptation to darkness enables the calculation of a complete set of coefficients for chlorophyll (Chl) fluorescence and P700 light absorption; however, dark-adapted plants demonstrate drastically different patterns of Chl fluorescence than that of light-adapted plants. The present work compared light-adapted barley plants without dark adaptation (L), and barley plants adapted to darkness and readapted to light for 7.5 min (D/L). The rapid light curves were generally similar in both the L and D/L variants. Some differences between the L and D/L variants were found in plants grown at any illumination. A number of distinctions between the L and D/L variants were characteristic of plants grown under particular illumination levels. The present analysis demonstrated that the scheme including dark adaptation and short readaptation to light (D/L) enabled to obtain generally correct data.
Additional key words: actinic light intensity; barley; pulse amplitude modulation; rapid light curves.
Received: November 5, 2020; Revised: February 24, 2021; Accepted: March 3, 2021; Prepublished online: April 12, 2021; Published: June 29, 2021 Show citation
Supplementary files
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