Is light quality involved in the regulation of the photosynthetic apparatus in attached rice leaves?

被引:45
作者
Yamazaki, Jun-ya [1 ]
机构
[1] Toho Univ, Dept Biol, Fac Sci, Chiba 2748510, Japan
关键词
Light quality; Light absorption balance; Photosystem stoichiometry; PSII heterogeneity; Reactive oxygen species; Rice (Oryza sativa L.); PHOTOSYSTEM STOICHIOMETRY; LEAF SENESCENCE; SPINACH-CHLOROPLASTS; THYLAKOID MEMBRANES; EXCITATION-ENERGY; GENE-EXPRESSION; REDOX CONTROL; CHLOROPHYLL; ACCLIMATION; PROTEINS;
D O I
10.1007/s11120-010-9567-3
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
The regulatory effect of light quality on the photosynthetic apparatus in attached leaves of rice plants was investigated by keeping rice plants under natural light, in complete darkness, or under illumination with light of different colors. When leaves were left in darkness and far-red (FR)-light conditions for 6 days at 30A degrees C, there was an initial lag in chlorophyll (Chl) content, Chl a/b ratio, and maximum photosystem (PS) II photochemistry that lasted until the second day; these then rapidly decreased on the fourth day. In contrast, ribulose 1,5-bisphosphate carboxylase/oxygenase (Rubisco) rapidly disappeared with no lag under low or zero light conditions. By using spectrophotometric quantitation, it was determined that the PSII and PSI reaction centers were regulated by light quality, but cytochrome (Cyt) f was regulated by light intensity. However, the PSII heterogeneity was also strongly modified by the light intensity; PSII alpha with the large antenna decreased markedly both in content and in antenna size. Consequently, the PSII alpha/PSI ratio declined under FR-light because the low intensity of FR-light dominated over its quality in the modulation of the PSII alpha/PSI ratio. An imbalance between them induced the generation of reactive oxygen species (ROS), although the ROS were scavenged by stromal enzymes such as superoxide dismutase (SOD), ascorbate peroxidase (APX), and glutathione reductase (GR). The activities of these stromal enzymes are also regulated by light quality. Thus, although the photosynthetic apparatus is regulated differently depending on light quality, light quality may play an important role in the regulation of the photosynthetic apparatus.
引用
收藏
页码:63 / 71
页数:9
相关论文
共 43 条
[2]  
AMAKO K, 1994, PLANT CELL PHYSIOL, V35, P497
[3]   The grand design of photosynthesis: Acclimation of the photosynthetic apparatus to environmental cues [J].
Anderson, JM ;
Chow, WS ;
Park, YI .
PHOTOSYNTHESIS RESEARCH, 1995, 46 (1-2) :129-139
[4]   PHOTOREGULATION OF THE COMPOSITION, FUNCTION, AND STRUCTURE OF THYLAKOID MEMBRANES [J].
ANDERSON, JM .
ANNUAL REVIEW OF PLANT PHYSIOLOGY AND PLANT MOLECULAR BIOLOGY, 1986, 37 :93-136
[5]   The water-water cycle in chloroplasts: Scavenging of active oxygens and dissipation of excess photons [J].
Asada, K .
ANNUAL REVIEW OF PLANT PHYSIOLOGY AND PLANT MOLECULAR BIOLOGY, 1999, 50 :601-639
[6]   ASSAYING FOR SUPEROXIDE-DISMUTASE ACTIVITY - SOME LARGE CONSEQUENCES OF MINOR CHANGES IN CONDITIONS [J].
BEYER, WF ;
FRIDOVICH, I .
ANALYTICAL BIOCHEMISTRY, 1987, 161 (02) :559-566
[7]   The molecular biology of leaf senescence [J].
BuchananWollaston, V .
JOURNAL OF EXPERIMENTAL BOTANY, 1997, 48 (307) :181-199
[8]   ADJUSTMENTS OF PHOTOSYSTEM STOICHIOMETRY IN CHLOROPLASTS IMPROVE THE QUANTUM EFFICIENCY OF PHOTOSYNTHESIS [J].
CHOW, WS ;
MELIS, A ;
ANDERSON, JM .
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 1990, 87 (19) :7502-7506
[9]  
CHOW WS, 1990, AUST J PLANT PHYSIOL, V17, P665
[10]   PHOTOSYNTHETIC RESPONSES OF PISUM-SATIVUM TO AN INCREASE IN IRRADIANCE DURING GROWTH .1. PHOTOSYNTHETIC ACTIVITIES [J].
CHOW, WS ;
ANDERSON, JM .
AUSTRALIAN JOURNAL OF PLANT PHYSIOLOGY, 1987, 14 (01) :1-8