期刊
PHOTOSYNTHESIS RESEARCH
卷 136, 期 2, 页码 129-138出版社
SPRINGER
DOI: 10.1007/s11120-017-0449-9
关键词
Photosynthesis; Alternative electron transport; Flavodiiron proteins; Non-photochemical quenching; Dark-light transitions; Photosynthetic efficiency
资金
- National Agency for the Promotion of Science and Technology [PICT 2014-2496, PICT 2015-3828]
- National Research Council of Argentina [PIP 1075]
- Federal Ministry of Education and Research
- Bundesministerium fur Bildung und Forschung
Plants grown in the field experience sharp changes in irradiation due to shading effects caused by clouds, other leaves, etc. The excess of absorbed light energy is dissipated by a number of mechanisms including cyclic electron transport, photorespiration, and Mehler-type reactions. This protection is essential for survival but decreases photosynthetic efficiency. All phototrophs except angiosperms harbor flavodiiron proteins (Flvs) which relieve the excess of excitation energy on the photosynthetic electron transport chain by reducing oxygen directly to water. Introduction of cyanobacterial Flv1/Flv3 in tobacco chloroplasts resulted in transgenic plants that showed similar photosynthetic performance under steady-state illumination, but displayed faster recovery of various photosynthetic parameters, including electron transport and non-photochemical quenching during dark-light transitions. They also kept the electron transport chain in a more oxidized state and enhanced the proton motive force of dark-adapted leaves. The results indicate that, by acting as electron sinks during light transitions, Flvs contribute to increase photosynthesis protection and efficiency under changing environmental conditions as those found by plants in the field.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据