Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

Involvement of the rice LBD37 (OsLBD37) ortholog of Arabidopsis in nitrogen metabolism- and senescence-related processes

ABSTRACT: This SuperSeries is composed of the following subset Series: GSE14646: Gene expression in aerial parts of rice-Arabidopsis Os-LBD37 FOX plants GSE14647: Gene expression in leaf blades of the rice Os-LBD37 overexpressor line RK16331-13 Refer to individual Series

ORGANISM(S): Arabidopsis thaliana

SUBMITTER: Miyako Kusano

PROVIDER: E-GEOD-14663 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Metabolomic screening applied to rice FOX Arabidopsis lines leads to the identification of a gene-changing nitrogen metabolism.

Albinsky Doris D Kusano Miyako M Higuchi Mieko M Hayashi Naomi N Kobayashi Makoto M Fukushima Atsushi A Mori Masaki M Ichikawa Takanari T Matsui Keiko K Kuroda Hirofumi H Horii Yoko Y Tsumoto Yuko Y Sakakibara Hitoshi H Hirochika Hirohiko H Matsui Minami M Saito Kazuki K

Molecular plant 20090826 1

Plant metabolomics developed as a powerful tool to examine gene functions and to gain deeper insight into the physiology of the plant cell. In this study, we screened Arabidopsis lines overexpressing rice full-length (FL) cDNAs (rice FOX Arabidopsis lines) using a gas chromatography-time-of-flight mass spectrometry (GC-TOF/MS)-based technique to identify rice genes that caused metabolic changes. This screening system allows fast and reliable identification of candidate lines showing altered meta ...[more]

PMID: 20085895

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Project description:The allene oxide synthase (AOS) branch and the hydroperoxide lyase (HPL) branch of the oxylipin pathway function in plant responses to diverse stresses and have potential cross-talks between each other in the biosynthesis and signaling regulation, but there is still an absence of direct evidence and detailed information about this communication. Here, we identified and characterized a jasmonates acid (JA) overproduction mutant, cea62, by screening the Constitutive Expression of AOS gene (cea) from rice T-DNA insertion mutant library. Map-based cloning was used to isolate the target gene as the hydroperoxide lyase OsHPL3 gene. The gene expression, HPL enzyme activity and its resulting products, (E)-2-hexenal, were all depleted in the cea62 mutant, which resulted in dramatic JA overproduction and activation of JA signaling in the mutant. Consistent with the formation of the lesion mimic phenotype and the timing of the induction for some defense responsive genes, the activation of JA biosynthesis and signaling was regulated in a developmental way, just as the way by which OsHPL3 was regulated in the wild type plant. Microarray data showed that the JA-governed defense response was greatly activated in the cea62 mutant plant and the cea62 plant obtained enhanced resistance to the bacterial blight pathogen Xanthomonasoryzaepvoryzae (Xoo) T1 strain. Wounding response was attenuated in the cea62 mutant at an early developmental stage, while it was partially recovered when JA levels were elevated at a later developmental stage in the cea62 mutant. But, the wounding response was not altered at different developmental stages in the wild type plant. These findings suggest that these two branches of the oxylipin pathways crosstalked in the biosynthesis and signaling pathways and cooperated with each other to function in diverse stress responses. We compared the gene expression profile in leaf tissues of the wild-type plant and the cea62 mutant after lesion mimic phenotype appeared two months after sowing. Total RNAs were extracted from leaf blades from the rice (Oryza sativa L.) wild-type Nipponbare plant and from leaf blades of the rice (Oryza sativa L.) cea62 mutant in the Nipponbare (ssp japonica) background at two months after sowing. Three replicates of the cea62 mutant and wild type were performed.

Dataset Information

Involvement of the rice LBD37 (OsLBD37) ortholog of Arabidopsis in nitrogen metabolism- and senescence-related processes

Publications

Metabolomic screening applied to rice FOX Arabidopsis lines leads to the identification of a gene-changing nitrogen metabolism.

Similar Datasets

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