Abstract:
:The AtGRP5 gene from Arabidopsis thaliana encodes a glycine-rich protein which has a major activity in protoderm-derived cells and is expressed in cells that undergo the first anatomical modifications leading to somatic embryo development. It has been previously demonstrated that its minimum promoter is 316 bp long including the 5'UTR and presents three putative TATA-boxes sequences and several regions that are homologous to previous characterized cis-acting elements. In order to better characterize the AtGRP5 expression and to identify the promoter regions involved in its preferential epidermal expression, in situ hybridization and 5' promoter deletions were employed. In situ hybridization and GUS expression assays indicate that, besides being present during somatic embryogenesis, AtGRP5 is also expressed during the zygotic embryo development. The sequential 5' deletions indicate that multiple negative and positive regulatory elements are present in the AtGRP5 promoter and operate in order to confer its distinct expression pattern. A 44-bp region was shown to be essential for the epidermal expression of this gene in leaves, stems, flowers and fruits, and is also responsible for high activity of the AtGRP5 promoter in zygotic embryos. An element responsible for the phloem expression was also identified in a 35-bp region.
journal_name
Plant Cell Repjournal_title
Plant cell reportsauthors
Mangeon A,Magioli C,Tarré E,Cardeal V,Araujo C,Falkenbach E,Rocha CA,Rangel-Lima C,Sachetto-Martins Gdoi
10.1007/s00299-010-0835-7subject
Has Abstractpub_date
2010-05-01 00:00:00pages
461-71issue
5eissn
0721-7714issn
1432-203Xjournal_volume
29pub_type
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