Photosynthetica 1999, 36(1):61 | DOI: 10.1023/A:1007014603178

Diurnal Fluctuations in Photochemical Activities of Chloroplasts in Field Grown Cyamopsis Tetragonoloba Seedlings

K. Lingakumar1, G. Kulandaivelu1
1 School of Biological Sciences, Madurai Kamaraj University, Madurai, India

In field-grown Cyamopsis seedlings, distinct changes were found in the rates of photosystems (PS) 2 and 1 activities at different time of the day. Maximum PS2 activity was at around 11:00 h and decreased thereafter. On the contrary, PS1 activity continued to increase up to 14:00 h and declined in evening hours. Significant energy transfer from PS2 to PS1 was evident during the morning and evening hours of the day whereas a slow excitation of PS2 and energy transfer was favoured during noon hours.

Additional key words: chlorophyll fluorescence; photochemical activities; photosystems 1 and 2

Published: June 1, 1999  Show citation

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Lingakumar, K., & Kulandaivelu, G. (1999). Diurnal Fluctuations in Photochemical Activities of Chloroplasts in Field Grown Cyamopsis Tetragonoloba Seedlings. Photosynthetica, 36(1-2), 61. doi: 10.1023/A:1007014603178
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