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Metabolomics,Unknown,Transcriptomics,Genomics,Proteomics

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Transcription profiling of Arabidopsis circadian and light signaling mutants lux-2, lhy and phyB-9 in a time series over either intermediate or short days

ABSTRACT: Arabidopsis thaliana circadian and light signaling mutants have long hypocotyls under light/dark cycles. In order to determine if aberrant hypocotyl growth is due to time of day specific miss-expression of growth associated transcripts we conducted time course microarray experiments in the lux-2, lhy and phyB-9 mutants. The mutants and their parental genotypes were grown on plates under either intermediate days (12 hours light and 12 hours dark) for lux-2, or short day (8 hrs of light and 16 hrs of dark) for lhy and phyB-9, for seven days and tissue was collected every four hours over one day.

INSTRUMENT(S): 418 [Affymetrix]

ORGANISM(S): Arabidopsis thaliana

SUBMITTER: Todd Michael

PROVIDER: E-MEXP-1299 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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A morning-specific phytohormone gene expression program underlying rhythmic plant growth.

Michael Todd P TP Breton Ghislain G Hazen Samuel P SP Priest Henry H Mockler Todd C TC Kay Steve A SA Chory Joanne J

PLoS biology 20080901 9

Most organisms use daily light/dark cycles as timing cues to control many essential physiological processes. In plants, growth rates of the embryonic stem (hypocotyl) are maximal at different times of day, depending on external photoperiod and the internal circadian clock. However, the interactions between light signaling, the circadian clock, and growth-promoting hormone pathways in growth control remain poorly understood. At the molecular level, such growth rhythms could be attributed to sever ...[more]

PMID: 18798691

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