Cyclic electron transport around photosystem I (PSI) was discovered more than a half-century ago and two pathways have been identified in angiosperms. Recently, substantial progress has been made in understanding the structure of the chloroplast NADH dehydrogenase-like (NDH) complex, which mediates a route of the cyclic electron transport pathways. However, the physiological significance of the chloroplast NDH complex has remained to be clarified. Most studies focused on the role of the NDH-dependent PSI cyclic electron transport in alleviation of oxidative damage. However, the NDH-deficient mutants in tobacco and Arabidopsis are rather resistant to various stress conditions. The present study proposes a significant physiological function of chloroplast NDH at low light intensity, at which oxidative stress is not substantial in rice. This work would be the first paper which documents the significant physiological function of chloroplast NDH at low light intensity.
Research Area “Creation of essential technologies to utilize carbon dioxide as a resource through the enhancement of plant productivity and the exploitation of plant products”
Research Theme “Mechanisms of photosynthetic regulation under fluctuating light conditions”
Wataru Yamori, Toshiharu Shikanai, and Amane Makino. “Photosystem I cyclic electron flow via chloroplast NADH dehydrogenase-like complex performs a physiological role for photosynthesis at low light”. Scientific Reports, Published online 11 September 2015, doi: 10.1038/srep13908.
Wataru Yamori, Ph.D.
Assistant Professor, Center for Environment, Health and Field Sciences, Chiba University
Koji Matsuo, Tetsu Kawaguchi, and Yasunobu Ohkawa
Life Innovation Group, Department of Innovation Research, JST