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PMID:17048141

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Citation

Riemann, M, Gutjahr, C, Korte, A, Riemann, M, Danger, B, Muramatsu, T, Bayer, U, Waller, F, Furuya, M and Nick, P (2007) GER1, a GDSL motif-encoding gene from rice is a novel early light- and jasmonate-induced gene. Plant Biol (Stuttg) 9:32-40

Abstract

The reaction of the rice mutant HEBIBA differs from that of wild-type rice in that the mutant responds inversely to red light and is defective in the light-triggered biosynthesis of jasmonic acid (JA). Using the wild type and the HEBIBA mutant of rice in a differential display screen, we attempted to identify genes that act in or near the convergence point of light and JA signalling. We isolated specifically regulated DNA fragments from approximately 10 000 displayed bands, and identified a new early light- and JA-induced gene. This gene encodes an enzyme containing a GDSL motif, showing 38 % identity at the amino acid level to lipase Arab-1 in Arabidopsis thaliana. The GDSL CONTAINING ENZYME RICE 1 gene (GER1) is rapidly induced by both red (R) and far-red (FR) light and by JA. The results are discussed with respect to a possible role for GER1 as a negative regulator of coleoptile elongation in the context of recent findings on the impact of JA on light signalling.

Links

PubMed Online version:10.1055/s-2006-924561

Keywords

Amino Acid Motifs; Cloning, Molecular; Cyclopentanes/pharmacology; Gene Expression Regulation, Plant/drug effects; Green Fluorescent Proteins/analysis; Light; Molecular Sequence Data; Oryza sativa/drug effects; Oryza sativa/genetics; Oryza sativa/radiation effects; Oxylipins; Phytochrome A/physiology; Phytochrome B/physiology; Plant Proteins/analysis; Plant Proteins/chemistry; Plant Proteins/genetics; Sequence Alignment; Signal Transduction

Significance

Annotations

Gene product Qualifier GO Term Evidence Code with/from Aspect Extension Notes Status

ORYSJ:GL84

GO:0010017: red or far-red light signaling pathway

ECO:0000315:

P

Figure 4 shows transcript levels of PhyA and PhyB mutants in the dark and with a red light pulse. Those with one phytochrome mutated had an increase in transcript level after the red light pulse and mutants wit both phytocromes mutated had no GER1 response. Figure 2 shows an accumulation of GER1 in red and far red light for wild type and little induction of GER1 in hebiba mutant with impaired light response.

complete
CACAO 9776

See also

References

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