Journal
PLANT AND CELL PHYSIOLOGY
Volume 50, Issue 7, Pages 1393-1399Publisher
OXFORD UNIV PRESS
DOI: 10.1093/pcp/pcp080
Keywords
Arabidopsis thaliana; COX6b gene; Gene expression; Promoter analysis; Site II element; Sucrose-responsive element
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Funding
- Consejo Nacional de Investigaciones Cientficas y Tecnicas (CONICET, Argentina)
- Agencia Nacional de Promocion Cientfica y Tecnologica
- Universidad Nacional del Litoral
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The promoters of the three Arabidopsis nuclear genes encoding mitochondrial cytochrome c oxidase subunit 6b (AtCOX6b) have similar expression patterns, with preferential expression in anthers and meristems, and are induced by sucrose and etiolation. Additionally, induction of AtCOX6b-1 by GA(3) and AtCOX6b-3 by 6-benzylaminopurine was observed. Site II elements (TGGGCC/T) present in the three promoters bind common nuclear proteins and are important for basal and induced expression. Induction by sucrose requires, in addition, the integrity of elements with the sequence TACTAA. The results imply the participation of common regulatory factors in the expression of the three Arabidopsis COX6b genes.
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