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Peculiarities of the Transformation of Asteraceae Family Species: The Cases of Sunflower and Lettuce

Abstract
The Asteraceae family is the largest and most diversified family of the Angiosperms, characterized by the presence of numerous clustered inflorescences, which have the appearance of a single compound flower. It is estimated that this family represents around 10% of all flowered species, with a great biodiversity, covering all environments on the planet, except Antarctica. Also, it includes economically important crops, such as lettuce, sunflower, and [ver mas...]
The Asteraceae family is the largest and most diversified family of the Angiosperms, characterized by the presence of numerous clustered inflorescences, which have the appearance of a single compound flower. It is estimated that this family represents around 10% of all flowered species, with a great biodiversity, covering all environments on the planet, except Antarctica. Also, it includes economically important crops, such as lettuce, sunflower, and chrysanthemum; wild flowers; herbs, and several species that produce molecules with pharmacological properties. Nevertheless, the biotechnological improvement of this family is limited to a few species and their genetic transformation was achieved later than in other plant families. Lettuce (Lactuca sativa L.) is a model species in molecular biology and plant biotechnology that has easily adapted to tissue culture, with efficient shoot regeneration from different tissues, organs, cells, and protoplasts. Due to this plasticity, it was possible to obtain transgenic plants tolerant to biotic or abiotic stresses as well as for the production of commercially interesting molecules (molecular farming). These advances, together with the complete sequencing of lettuce genome allowed the rapid adoption of gene editing using the CRISPR system. On the other hand, sunflower (Helianthus annuus L.) is a species that for years was considered recalcitrant to in vitro culture. Although this difficulty was overcome and some publications were made on sunflower genetic transformation, until now there is no transgenic variety commercialized or authorized for cultivation. In this article, we review similarities (such as avoiding the utilization of the CaMV35S promoter in transformation vectors) and differences (such as transformation efficiency) in the state of the art of genetic transformation techniques performed in these two species. [Cerrar]
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Author
Darqui, Flavia Soledad;   Radonic, Laura Mabel;   Beracochea, Valeria Cecilia;   Hopp, Horacio Esteban;   Lopez Bilbao, Marisa Gisela;  
Fuente
Frontriers in Plant Science 12 : 767459. (November 2021)
Date
2021-11
Editorial
Frontiers Publishing
ISSN
1664-462X
URI
http://hdl.handle.net/20.500.12123/10846
https://www.frontiersin.org/articles/10.3389/fpls.2021.767459/full
DOI
https://doi.org/10.3389/fpls.2021.767459
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Asteraceae; Helianthus annuus; Lechugas; Lettuces; Genética; Genetics; Transferencia de Genes; Gene Transfer; Girasol; Sunflower; Transgenesis;
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Excepto donde se diga explicitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
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