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First published online August 28, 2003; 10.1104/pp.103.025320 Plant Physiology 133:618-629 (2003) © 2003 American Society of Plant Biologists Isolation of a Gene Encoding a Copper Chaperone for the Copper/Zinc Superoxide Dismutase and Characterization of Its Promoter in PotatoGraduate School Experimental Plant Sciences, Laboratory of Plant Breeding, Department of Plant Sciences, Wageningen University, P.O. Box 386 6700 AJ Wageningen, The Netherlands
Gene expression during the potato (Solanum tuberosum) tuber lifecycle was monitored by cDNA-amplified fragment-length polymorphism, and several differentially expressed transcript-derived fragments were isolated. One fragment, named TDFL431, showed high homology to a copper (Cu) chaperone for Cu/zinc superoxide dismutase (CCS). The Ccs protein is responsible for the delivery of Cu to the Cu/zinc superoxide dismutase enzyme. The potato CCS (StCCS) full-length gene was isolated, and its sequence was compared with CCSs from other species. The promoter region of this gene was isolated, fused to the firefly luciferase coding sequence, and used for transformation of potato plants. The highest level of StCCS-luciferase expression was detected in the cortex of stem (like) tissues, such as stem nodes, stolons, and tubers; lower levels were detected in roots and flowers. The StCCS promoter contains regions highly homologous to several plant cis-acting elements. Three of them are related to auxin response, whereas four others are related to response to various stresses. Induction of the StCCS promoter was analyzed on 18 media, differing in hormone, sugar, and Cu content. StCCS expression was induced by auxin, gibberellins (GA4 + 7), fructose, sucrose, and glucose and was inhibited by relatively high concentrations of Cu.
Article, publication date, and citation information can be found at www.plantphysiol.org/cgi/doi/10.1104/pp.103.025320. * Corresponding author; e-mail luisa.trindade{at}wur.nl; fax 31317483457. Received April 11, 2003; returned for revision May 26, 2003; accepted June 26, 2003. This article has been cited by other articles:
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