MsTFL1A delays flowering and regulates shoot architecture and root development in Medicago sativa.
Alfalfa
Delayed-flowering
Flowering
Forage
MsTFL1A
Root-development
Journal
Plant reproduction
ISSN: 2194-7961
Titre abrégé: Plant Reprod
Pays: Germany
ID NLM: 101602701
Informations de publication
Date de publication:
03 May 2023
03 May 2023
Historique:
received:
16
02
2023
accepted:
19
04
2023
medline:
3
5
2023
pubmed:
3
5
2023
entrez:
3
5
2023
Statut:
aheadofprint
Résumé
MsTFL1A is an important gene involved in flowering repression in alfalfa (Medicago sativa) which conditions not only above-ground plant shoot architecture but also root development and growth. Delayed flowering is an important trait for forage species, as it allows harvesting of high-quality forage for a longer time before nutritional values decline due to plant architecture changes related to flowering onset. Despite the relevance of delayed flowering, this trait has not yet been thoroughly exploited in alfalfa. This is mainly due to its complex genetics, sensitivity to inbreeding and to the fact that delayed flowering would be only advantageous if it allowed increased forage quality without compromising seed production. To develop new delayed-flowering varieties, we have characterized the three TERMINAL FLOWERING 1 (TFL1) family of genes in alfalfa: MsTFL1A, MsTFL1B and MsTFL1C. Constitutive expression of MsTFL1A in Arabidopsis caused late flowering and changes in inflorescence architecture, indicating that MsTFL1A is the ortholog of Arabidopsis TFL1. Overexpression of MsTFL1A in alfalfa consistently led to delayed flowering in both controlled and natural field conditions, coupled to an increase in leaf/stem ratio, a common indicator of forage quality. Additionally, overexpression of MsTFL1A reduced root development, reinforcing the role of MsTFL1A not only as a flowering repressor but also as a regulator of root development.We conclude that the precise manipulation of MsTFL1A gene expression may represent a powerful tool to improve alfalfa forage quality.
Identifiants
pubmed: 37133696
doi: 10.1007/s00497-023-00466-7
pii: 10.1007/s00497-023-00466-7
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Subventions
Organisme : Agencia Nacional de Promoción Científica y Tecnológica
ID : PICT-2017-4660
Organisme : Agencia Nacional de Promoción Científica y Tecnológica
ID : PICT 2020-01430
Organisme : Agencia Nacional de Promoción Científica y Tecnológica (ARG)
ID : PICT-2017-1626
Informations de copyright
© 2023. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.
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