Identification of a putative Solanum tuberosum transcriptional coactivator up-regulated in potato tubers by Fusarium solani f. sp. eumartii infection and wounding

AV, ZANETTI ME, SAN SEGUNDO B AND CASALONGUÉ C.

PHYSIOLOGIA PLANTARUM

Año: 2001 vol. 112 p. 217 - 222

0031-9317

Coadaptors or coactivators are a new class of transcription factors capable of interconnecting a regulator DNA-binding protein with a component of the basal transcription machinery allowing transcriptional activation to proceed. We report the identification of a novel Solanum tuberosum ssp. tuberosum putative transcription coactivator, named StMBF1 (Solanumtuberosummultiprotein bridging factor 1). The StMBF1 cDNA was isolated from a Fusarium solani f. sp. eumartii-infected potato tuber cDNA library, using a differential screening approach. StMBF1 is up-regulated during fungal attack as well as on wounding. A Fusarium elicitor source and ethylene precursor and salicylic acid also regulate StMBF1 expression. The precise role of StMBF1 during the plant response against environmental stresses remains to be elucidated.