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Author Izawa T. , Mihara M. , Suzuki Y. , Gupta M. , Itoh H. , Nagano A.J. , Motoyama R. , Sawada Y. , Yano M. , Hirai M.Y. , Makino A. , Nagamura Y.
Title Os-GIGANTEA Confers Robust Diurnal Rhythms on the Global Transcriptome of Rice in the Field.
Abstract:
The circadian clock controls physiological traits such as flowering time, photosynthesis, and growth in plants under laboratory conditions. Under natural field conditions, however, little is known about the significance of the circadian clock in plants. By time-course transcriptome analyses of rice (Oryza sativa) leaves, using a newly isolated rice circadian clock-related mutant carrying a null mutation in Os-GIGANTEA (Os-GI), we show here that Os-GI controlled 75% (false discovery rate = 0.05) of genes among 27,201 genes tested and was required for strong amplitudes and fine-tuning of the diurnal rhythm phases of global gene expression in the field. However, transcripts involved in primary metabolism were not greatly affected by osgi. Time-course metabolome analyses of leaves revealed no trends of change in primary metabolites in osgi plants, and net photosynthetic rates and grain yields were not affected. By contrast, some transcripts and metabolites in the phenylpropanoid metabolite pathway were consistently affected. Thus, net primary assimilation of rice was still robust in the face of such osgi mutation-related circadian clock defects in the field, unlike the case with defects caused by Arabidopsis thaliana toc1 and ztl mutations in the laboratory.
Journal Plant Cell
Country Japan
Volume 23(5)
Pages 1741-55
Year 2011
PubMed ID 21571948
PubMed Central ID -
DOI -
URL -
Relation
Gene GI HD2 HD3A LHY PRR59 PRR73 PRR95 SE1 SE5 TOC1
INSD -
Strain Wild Core Collection -
Induced Mutation Lines(NIG Collection) -
Sterile Seed Strain -
Lethal Embryo
Mutantion Strain 		-
Stages in Each Organ
- Muant Lines (Gene) 		-
Cultivated Varieties(NIG Collection) -
Stages in Each Organ -
/rice/oryzabase