Record Details
EARLY BUD-BREAK 1 (EBB1) is a regulator of release from seasonal dormancy in poplar trees
ScholarsArchive at Oregon State University
| Field | Value |
|---|---|
| Title | EARLY BUD-BREAK 1 (EBB1) is a regulator of release from seasonal dormancy in poplar trees |
| Names |
Yordanov, Yordan S.
(creator) Ma, Cathleen (creator) Strauss, Steven H. (creator) Busov, Victor B. (creator) |
| Date Issued | 2014-07-08 (iso8601) |
| Note | This is an author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by the National Academy of Sciences of the United States of America and can be found at: http://www.pnas.org/. |
| Abstract | Trees from temperate latitudes transition between growth and dormancy to survive dehydration and freezing stress during winter months. We employed activation tagging to isolate a dominant mutation affecting release from dormancy, and identified the corresponding gene EARLY BUD-BREAK 1 (EBB1). We demonstrate through positioning of the tag, expression analysis, and retransformation experiments that EBB1 encodes a putative AP2/ERF transcription factor. Transgenic upregulation of the gene caused early bud-flush, while down-regulation delayed bud-break. Native EBB1 expression was highest in actively-growing apices, undetectable during the dormancy period, but rapidly increased prior to bud-break. The EBB1 transcript was localized in the L1/L2 layers of the shoot meristem and leaf primordia. EBB1-overexpressing transgenic plants displayed enlarged shoot meristems, open and poorly differentiated buds, and a higher rate of cell division in the apex. Transcriptome analyses of the EBB1 transgenics identified 971 differentially-expressed genes whose expression correlated with the EBB1 expression changes in the transgenic plants. Promoter analysis among the differentially expressed genes for presence of a canonical EBB1 binding site identified 65 putative target genes indicative of a broad regulatory context of EBB1 function. Our results suggest that EBB1 has a major and integrative role in reactivation of meristem activity after winter dormancy. |
| Genre | Article |
| Topic | Adaptation |
| Identifier | Yordanov, Y. S., Ma, C., Strauss, S. H., & Busov, V. B. (2014). EARLY BUD-BREAK 1 (EBB1) is a regulator of release from seasonal dormancy in poplar trees. Proceedings of the National Academy of Sciences, 111(27), 10001-10006. doi:10.1073/pnas.1405621111 |
