Journal Article

Photosynthetic Characteristics of Rice Leaves Grown under Red Light with or without Supplemental Blue Light

Ryo Matsuda, Keiko Ohashi-Kaneko, Kazuhiro Fujiwara, Eiji Goto and Kenji Kurata

in Plant and Cell Physiology

Published on behalf of Japanese Society of Plant Physiologists

Volume 45, issue 12, pages 1870-1874
Published in print December 2004 | ISSN: 0032-0781
Published online December 2004 | e-ISSN: 1471-9053 | DOI: http://dx.doi.org/10.1093/pcp/pch203
Photosynthetic Characteristics of Rice Leaves Grown under Red Light with or without Supplemental Blue Light

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In rice plants grown under red light supplemented with blue light (red/blue-light PPFD ratio was 4/1), photosynthetic rates per unit leaf area measured under white light at 1,600 and 250 µmol m–2 s–1 were higher than those in the plants grown under red light alone. The higher photosynthetic rates were associated with higher total N content of leaves, which was accompanied by larger amounts of key components of photosynthesis-limiting processes, including Rubisco, Cyt f, Chl and LHCII. These results suggested that the increase in total N content of leaves induced by supplemental blue light enhanced both light-saturated and light-limited photosynthesis.

Keywords: Keywords: Blue light — Gas exchange (photosynthesis) — Light-emitting diode (LED) — Light quality — Nitrogen (leaf) — Rice (Oryza sativa L.).; Abbreviations: LED, light-emitting diode; LHCII, light-harvesting Chl a/b-binding protein of PSII; pCa, atmospheric CO2 partial pressure; PPFD, photosynthetic photon flux density; R, red light; RB, red light supplemented with blue light; Rubisco, ribulose-1,5-bisphosphate carboxylase/oxygenase; RuBP, ribulose-1,5-bisphosphate; SPD, spectral photon-number distribution.

Journal Article.  3648 words.  Illustrated.

Subjects: Biochemistry ; Molecular and Cell Biology ; Plant Sciences and Forestry

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