Level of expression of the tomato rbcS-3A gene is modulated by a far upstream promoter element in a developmentally regulated manner.
Open Access
- 1 February 1989
- journal article
- research article
- Published by Oxford University Press (OUP) in Plant Cell
- Vol. 1 (2) , 217-227
- https://doi.org/10.1105/tpc.1.2.217
Abstract
By Agrobacterium-mediated transformation we have demonstrated that a 1.10-kilobase promoter sequence from the tomato rbcS-3A gene confers light-inducible and organ-specific expression upon fusion to the bacterial chloramphenicol acetyltransferase gene. A biphasic expression profile was obtained by 5' deletion analysis of this promoter, indicating the presence of both positive and negative regulatory elements. A severe reduction in the level of expression was observed when the 5'-terminal 90 base pairs were deleted from the 1.10-kilobase promoter. DNA sequence elements responsible for light inducibility and organ specificity of the gene reside within the -374 base pairs of the proximal part of the promoter and the sequences spanning from -374 to -205 are essential for promoter function. The DNA sequences upstream from -374 modulate the level of expression in leaf tissue; this modulation is under developmental control.This publication has 37 references indexed in Scilit:
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