Analysis of Cis-Active Sequences Involved in the Leaf-Specific Expression of a Potato Gene in Transgenic Plants

ST-LS1 is a light-inducible, single-copy gene from potato that is expressed only in photosynthetic tissues. Various sequences derived from the 5′-upstream region of this gene were fused to the coding region of the chloramphenicol acetyltransferase (CAT) gene and to the gene 7 termination region of t...

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Bibliographic Details
Published in:Proceedings of the National Academy of Sciences - PNAS 1987-11, Vol.84 (22), p.7943-7947
Main Authors: Stockhaus, Jörg, Eckes, Peter, Rocha-Sosa, Mario, Schell, Jeff, Willmitzer, Lothar
Format: Article
Language:English
Subjects:
Biological and medical sciences
Biological Sciences: Botany
Biotechnology
Callus
Chloroplasts
Fundamental and applied biological sciences. Psychology
Genes
Genetic engineering
Genetic technics
Leaves
Methods. Procedures. Technologies
Nucleotides
Peas
Plant roots
Plants
Terminator regions
Transgenic plants
Vectors (cloning, transfer, expression). Insertion sequences and transposons
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Summary:ST-LS1 is a light-inducible, single-copy gene from potato that is expressed only in photosynthetic tissues. Various sequences derived from the 5′-upstream region of this gene were fused to the coding region of the chloramphenicol acetyltransferase (CAT) gene and to the gene 7 termination region of the transfer DNA (T-DNA) from the Agrobacterium Ti plasmid pTiACH5 and transferred to tobacco using Ti-plasmid vectors. After regeneration of whole plants, tissues were assayed for the expression of the CAT gene. Sequences derived from the 5′-upstream region of the ST-LS1 gene comprising positions -334 to +11 were sufficient to confer a leaf/stemspecific as well as a light-inducible expression of the CAT gene. Destruction of chloroplasts by treatment with the herbicide norfluorazon and subsequent exposure to light drastically reduced the expression of the CAT gene indicating that this upstream sequence most likely interacts with a chloroplast-dependent signal. When sequences from position -98 to position +675 were fused to a truncated inactive fragment of the cauliflower mosaic virus 35S promoter in a head-to-head manner, the corresponding chimeric genes were again expressed in photosynthetic tissues only, indicating that these sequences have enhancer-like properties.
ISSN:0027-8424
1091-6490
DOI:10.1073/pnas.84.22.7943