Journal
PLANT CELL TISSUE AND ORGAN CULTURE
Volume 115, Issue 2, Pages 275-283Publisher
SPRINGER
DOI: 10.1007/s11240-013-0360-9
Keywords
Auxin; Wild passionfruit; In vitro culture; Callus; Differential gene expression; Xylem vessel differentiation
Funding
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES, Brazil)
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP, Sao Paulo, Brazil)
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq, Brazil)
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The plant-specific NAM/ATAF/CUC (NAC) transcription factors play critical roles in diverse developmental processes such as the establishment of the shoot apical meristem, lateral root formation, flowering time, senescence, abiotic stress and defense responses. NAC domain transcription factors may be regulated at the transcriptional level by environmental clues, such as hormone concentrations. Here we report the cloning of a Passiflora morifolia putative homolog to a gene encoding a NAC-domain transcription factor, PmNAC1. We have examined the expression patterns of this gene during in vitro callus induction and growth. We observed that the induction of transcript levels of PmNAC1 is correlated to increasing concentrations of 1-naphthalene acetic acid in the culture medium. Additionally, the results of in situ hybridization experiments indicated a dynamic spatial expression pattern for PmNAC1 during callus growth, coincidental with provascular tissue differentiation, especially with xylem cell specification.
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