Linked Life Data

16524874

Source:http://linkedlifedata.com/resource/pubmed/id/16524874

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
2006-6-1
pubmed:databankReference
http://linkedlifedata.com/resource/pubmed/xref/GENBANK/AB210844, http://linkedlifedata.com/resource/pubmed/xref/GENBANK/AB210845, http://linkedlifedata.com/resource/pubmed/xref/GENBANK/AB210846, http://linkedlifedata.com/resource/pubmed/xref/GENBANK/AB210847, http://linkedlifedata.com/resource/pubmed/xref/GENBANK/AB210849, http://linkedlifedata.com/resource/pubmed/xref/GENBANK/AB210850, http://linkedlifedata.com/resource/pubmed/xref/GENBANK/AB210851, http://linkedlifedata.com/resource/pubmed/xref/GENBANK/AB210852, http://linkedlifedata.com/resource/pubmed/xref/GENBANK/AB243681, http://linkedlifedata.com/resource/pubmed/xref/GENBANK/AB243682, http://linkedlifedata.com/resource/pubmed/xref/GENBANK/AB243683, http://linkedlifedata.com/resource/pubmed/xref/GENBANK/AB243684, http://linkedlifedata.com/resource/pubmed/xref/GENBANK/AB243685, http://linkedlifedata.com/resource/pubmed/xref/GENBANK/AB243686
pubmed:abstractText
The Lemna genus is a group of monocotyledonous plants with tiny, floating bodies. Lemna gibba G3 and L. paucicostata 6746 were once intensively analyzed for physiological timing systems of photoperiodic flowering and circadian rhythms since they showed obligatory and sensitive photoperiodic responses of a long-day and a short-day plant, respectively. We attempted to approach the divergence of biological timing systems at the molecular level using these plants. We first employed molecular techniques to study their circadian clock systems. We developed a convenient bioluminescent reporter system to monitor the circadian rhythms of Lemna plants. As in Arabidopsis, the Arabidopsis CCA1 promoter produced circadian expression in Lemna plants, though the phases and the sustainability of bioluminescence rhythms were somewhat diverged between them. Lemna homologs of the Arabidopsis clock-related genes LHY/CCA1, GI, ELF3 and PRRs were then isolated as candidates for clock-related genes in these plants. These genes showed rhythmic expression profiles that were basically similar to those of Arabidopsis under light-dark conditions. Results from co-transfection assays using the bioluminescence reporter and overexpression effectors suggested that the LHY and GI homologs of Lemna can function in the circadian clock system like the counterparts of Arabidopsis. All these results suggested that the frame of the circadian clock appeared to be conserved not only between the two Lemna plants but also between monocotyledons and dicotyledons. However, divergence of gene numbers and expression profiles for LHY/CCA1 homologs were found between Lemna, rice and Arabidopsis, suggesting that some modification of clock-related components occurred through their evolution.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
0032-0781
pubmed:author
pubmed:issnType
Print
pubmed:volume
47
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
601-12
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2006
pubmed:articleTitle
Conserved expression profiles of circadian clock-related genes in two Lemna species showing long-day and short-day photoperiodic flowering responses.
pubmed:affiliation
Department of Biological Science, Graduate School of Science, Nagoya University and CREST, Japan Science and Technology Corporation (JST), Furo-cho, Chikusa-ku, Nagoya, Aichi, 464-8602 Japan.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't