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Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/48705
Title: Two SCARECROW-LIKE genes are induced in response to exogenous auxin in rooting-competent cuttings of distantly related forest species.
Authors: Sánchez Fernández, M.ª Concepción; Vielba, Jesús; Ferro, Enrique; Covelo, Guillermo; Solé, Alicia; Abarca, Dolores; Mier, Belén S. de; Díaz-Sala, Carmen
Keywords: vegetative propagation
root meristem
Issue Date: 2007
Publisher: Heron Publishing
Citation: Tree Physiology 27, 1459–1470 (2007)
Abstract: This paper reports for the first time the identification of SCARECROW-LIKE genes from two distantly-related forest species, Pinus radiata and Castanea sativa, which are auxin-induced in rooting-competent cuttings before the activation of cell division that gives rise to adventitious root formation. The predicted protein sequences contain domains characteristic of the GRAS protein family, and show a strong similarity to the SCARECROW-LIKE proteins, which indicates conserved functions of these proteins. Quantitative RT-PCR analysis shows that these genes are expressed at relatively high levels in roots. In addition, an induction of the mRNA levels in rooting-competent cuttings from P. radiata and C. sativa in response to exogenous auxin is observed within the first 24 h of the root induction process, a time when cell reorganization takes place, prior to the resumption of cell division and to the appearance of adventitious root primordia. These results suggest that SCARECROW-LIKE genes may play a role at very early stages of adventitious root formation.
Publisher version (URL): http://dx.doi.org/10.1093/treephys/27.10.1459
URI: http://hdl.handle.net/10261/48705
DOI: 10.1093/treephys/27.10.1459
ISSN: 0829-318X
E-ISSN: 1758-4469
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