The interaction of nitrogen assimilation with photosynthesis in nitrogen deficient cells of Chlorella |
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Authors: | R J Thomas C R Hipkin P J Syrett |
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Institution: | (1) Department of Botany and Microbiology, University College of Swansea, Singleton Park, SA2 8PP Swansea, U.K. |
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Abstract: | Nitrogen-limited chemostat cultures of Chlorella fusca var. vacuolata, when given nitrogen in the inorganic forms of nitrate, nitrite and ammonium divert photo-generated electrons, from CO2 fixation to nitrogen assimilation. Addition of nitrate or nitrite, but not ammonium, stimulates rate of oxygen evolution. All but the most severely nitrogen-deficient culture have increased dark respiration rates after addition of inorganic nitrogen. The nitrite reduction step of nitrogen assimilation is the most light-dependent reaction.Abbreviation DCMU
3-(3 , 4 -dichloro)-1-1-dimethyl urea
- CCCP
carbonyl cyanide m-chlorophenylhydrazone |
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Keywords: | Nitrogen assimilation Respiration Photosynthesis Chlorella |
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