Redox state of plastoquionone pool regulates expression of Arabidopsis thaliana genes in response to elevated irradiance

• Autorzy: Adamiec M. , Drath M. , Jackowski G.
• Języki publikacji: EN

Abstrakty

EN

DNA microarray technology was applied to gain insight into the role of the redox state of PQ pool as a retrograde factor mediating differential expression of Arabidopsis nuclear genes during the acclimation to changing irradiance. DNA microarray chips containing probes corresponding to 24000 Arabidopsis nuclear genes were screened with cRNA samples prepared from leaves of plants exposed for 5 h to low irradiance (control) vs. medium, high and excessive irradiances (MI, HI and EI, respectively). Six hundred and sixty three genes were differentially expressed as a result of an exposure to at least one elevated irradiance. Among 663 differentially expressed genes a total of 50 were reverted by DCMU - 24 ones modulated at medium irradiance, 32 ones modulated at high irradiance and a single one modulated at excessive irradiance. We postulate that their expression is regulated by redox state of plastoquinone (PQ) pool. Thus the PQ-mediated redox regulation of expression of Arabidopsis nuclear genes is probably limited to the irradiance window representing non-stressing conditions. We found that the promoter regions of the PQ-regulated genes contained conserved elements, suggesting transcriptional control by a shared set of trans-acting factors which participate in signal transduction from the redox state of the PQ pool.

Słowa kluczowe

EN

gene expression; plastoquinone; transcription; DNA microarray; hierarchical clustering; Arabidopsis thaliana; elevated irradiance

• Wydawca: -
• Czasopismo: Acta Biochimica Polonica
• Rocznik: 2008
• Tom: 55
• Numer: 1
• Opis fizyczny: p.161-173,fig.,ref.

Twórcy

autor

Adamiec M.

• Adam Mickiewicz University, Umultowska 89, 61-616 Poznan, Poland

autor

Drath M.

autor

Jackowski G.

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