Nov 6, 2014

Evolutionary analysis of LP3 gene family in conifers: an ASR homolog

BioRxiv : the Preprint Server for Biology
Paul P Gardner, Hisham Eldai


Drought has long been established as a major environmental stress for plants which have in turn developed several coping strategies, ranging from physiological to molecular mechanisms. LP3; a homolog of the Abscisic Acid, Stress and Ripening (ASR) gene was first detected in tomato; and has been shown to be present in four different isoforms in loblolly pine called LP3-0, LP3-1, LP3-2 and LP3-3. While ASR has already been extensively studied notably in tomato, the same cannot be said of LP3. Like ASR, the different LP3 isoforms have been shown to be upregulated in response to water deficit stress and to also act as transcription factors for genes likely involved in hexose transport. In this study we have investigated the evolutionary history of LP3 gene family, with the aim of relating it to that of ASR from a phylogenetic perspective and comparing the differences in selective pressure and codon usage. Phylogenetic analyses of different LP3 homologs compared to ASR show that LP3 is less divergent across species than ASR and that even when comparing the different sub-sections of the gene the divergence rate of LP3 is lower than that of ASR. Analysis of different gene parameters showed that there were differences in GC1% and GC2% ...Continue Reading

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Mentioned in this Paper

Small Nuclear RNA
Transposition of Intestine (Disorder)
Research Personnel
Protein Biosynthesis
Gene Expression
Cellular Transposition
Piwi-Interacting RNA

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