PARENT SESSION
Posters P2B Light, redox and metabolic regulation: Light Reactions. Abstracts (444-478)

The role and regulation of multiple forms of ferredoxin NADP oxidoreductase in higher plants. Caroline Bowsher^*,1, Linda Eyers¹, Caroline Grimshaw¹, Jennet Gummodova¹, ¹ School of Biological Sciences, Manchester, UK

ABSTRACT- ferredoxin NADP oxidoreducatse (FNR) is a FAD containing enzyme that catalyses the reversible electron transfer between NAD(P)H and electron carrier proteins such as ferredoxin. In higher plants there are multiple isoforms of FNR. A study to characterise the presence of these multiple forms along a developing cereal leaf has been made. This allows comparisons to be made along a gradient of photosynthetic activity, from non-photosynthetic cells at the base to photosynthetic cells at the tip. Results show that depending on the presence/ absence of light and/or nitrate, there is a change at the transcriptional, protein and enzyme level in the regulation of the different isoforms of FNR. This has important implications in terms of the role and interaction of the different forms of FNR in photosynthesis and other aspects of metabolism.

KEY WORDS: Leaves, Light, FNR, Regulation