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Título
In Vitro Plant Regeneration in Conifers: The Role of WOX and KNOX Gene Families
Autor
Facultad/Centro
Área de conocimiento
Título de la revista
Genes
Número de la revista
3
Cita Bibliográfica
Bueno, N., Cuesta, C., Centeno, M. L., Ordás, R. J., & Alvarez, J. M. (2021). In vitro plant regeneration in conifers: The role of WOX and KNOX gene families. Genes, 12(3). https://doi.org/10.3390/GENES12030438
Editorial
MDPI
Fecha
2021
Resumen
[EN] Conifers are a group of woody plants with an enormous economic and ecological importance.
Breeding programs are necessary to select superior varieties for planting, but they have many
limitations due to the biological characteristics of conifers. Somatic embryogenesis (SE) and de novo
organogenesis (DNO) from in vitro cultured tissues are two ways of plant mass propagation that
help to overcome this problem. Although both processes are difficult to achieve in conifers, they offer
advantages like a great efficiency, the possibilities to cryopreserve the embryogenic lines, and the
ability of multiplying adult trees (the main bottleneck in conifer cloning) through DNO. Moreover, SE
and DNO represent appropriate experimental systems to study the molecular bases of developmental
processes in conifers such as embryogenesis and shoot apical meristem (SAM) establishment. Some
of the key genes regulating these processes belong to the WOX and KNOX homeobox gene families,
whose function has been widely described in Arabidopsis thaliana. The sequences and roles of these
genes in conifers are similar to those found in angiosperms, but some particularities exist, like the
presence of WOXX, a gene that putatively participates in the establishment of SAM in somatic
embryos and plantlets of Pinus pinaster.
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