Changes to the microbiome of alfalfa during the growing season and after ensiling with Lentilactobacillus buchneri and Lentilactobacillus hilgardii inoculant

Par Conseil national de recherches du Canada

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DOI	Trouver le DOI : https://doi.org/10.1111/jam.15641
Auteur	Rechercher : Drouin, Pascal Identifiant ORCID : https://orcid.org/0000-0002-3639-8298; Rechercher : Tremblay, Julien¹Identifiant ORCID : https://orcid.org/0000-0002-6085-3481; Rechercher : Da Silva, Érica Benjamim Identifiant ORCID : https://orcid.org/0000-0003-1335-4003; Rechercher : Apper, Emmanuelle
Affiliation	Conseil national de recherches du Canada. Énergie, les mines et l'environnement
Format	Texte, Article
Résumé	Aims: This study evaluated changes in epiphytic microbial population of alfalfa (Medicago sativa) during the growing season. First cut forage was harvested to study the effects of an inoculant combining two obligate heterofermentative lactic acid bacteria strains on the bacterial and fungal communities and the fermentation of alfalfa silage. Methods and Results: The epiphytic microbiome of alfalfa was evaluated 10- times during the growing season. Alfalfa wilted to 395.0 g/kg was treated with water (Control) or with a combination of L. buchneri NCIMB 40788 and L. hilgardii CNCM-I-4785 (LBLH). Mini-silos were opened after 1, 4, 8, 16, 32, and 64 days of ensiling. The relative abundance (RA) of the epiphytic bacterial and fungal families varied during the growing season. After 1 day, Weissella was the most abundant genus and present at similar RA in the two treatments (average 80.4%). Compared with Control, LBLH had a higher RA of Lactobacillus at day 1, 16, 32, and 64, and a lower RA of Weissella from day 8 to 64. Control contained more bacteria belonging to the Enterobacteriales than LBLH up to day 16. Inoculated silage had more acetate than Control at day 32 and 64. The fungal population were similar between treatments. The enhanced development and dominance of Lactobacillus in inoculated silage led to greater accumulation of acetate and propionate, which reduced the numbers of culturable yeasts but did not markedly affect the fungal community structure. Conclusions: The bacterial community composition of alfalfa stands in the filed changed over time and was affected by cutting. For the ensiling trial, inoculation modified the composition of the bacterial community of alfalfa, increasing the RA of Lactobacillus while reducing the RA of Weissella and of Enterobacteriaceae. Significance and Impact of Study: Inoculation increased the RA of Lactobacillus, hampering the dominance of Weissella in the early stages of ensiling, improving antifungal compounds production and reducing the numbers of culturable yeasts.
Date de publication	2022-10-01
Maison d’édition	Oxford University Press Applied Microbiology International
Licence	Creative Commons, Attribution - Pas d’Utilisation Commerciale – Pas de Modification 4.0 International (CC BY-NC-ND 4.0) https://creativecommons.org/licenses/by-nc-nd/4.0/deed.fr
Dans	Journal of Applied Microbiology 133, nº 4 (1 octobre 2022) : 2331–2347.
Langue	anglais
Publications évaluées par des pairs	Oui
Exporter la notice	Exporter en format RIS
Signaler une correction	Signaler une correction (s'ouvre dans un nouvel onglet)
Identificateur de l’enregistrement	c8a0cdd3-dd49-40ca-9639-fe4371f2972d
Enregistrement créé	2023-10-06
Enregistrement modifié	2023-10-06

Date de modification :: 2024-07-17