The Effects of Bacillus velezensis NCIMB 30322 on Growth of Chenopodium ficifolium in Nutrient-depleted Conditions
Notice bibliographique
Résumé
Abiotic stressors, such as nutrient and drought stress, are a leading cause of crop yield reduction. Some bacteria and fungi are able to promote plant growth and increase stress tolerance by increasing nutrient availability through nitrogen fixation or phosphate solubilization, outcompeting pathogens, productions of volatile organic compounds (VOCs), reducing plant stress, and inducing induced systemic resistance (ISR), and thus serve as a valuable component of agricultural ecosystems to reduce dependency on chemical fertilizers. Chenopodium quinoa is a crop native to South America that has been gaining popularity in the United States because of its nutritive properties and resistance to drought and salinity. Quinoa has potential for cultivation in New England but has trouble growing in the region due to biotic and abiotic challenges however, wild Chenopodium species thrive in the region. Chenopodium ficifolium is a New England native relative of quinoa that thrives in the region and is considered to be a possible plant-microbe interactions model for quinoa. Commercially developed microbial products such as biostimulants present a possible solution to enhance quinoa growth in New England by increasing the tolerance and quality of quinoa. It has been noted that different 5 genotypes of plant hosts will recruit different microbes that can benefit them under stress. Even the same microbe can have various levels of growth-promotion due to the ecotype of the host, but there is little research on ecotype selectivity on Chenopodium species. In this work, we performed a controlled environment growth room study to evaluate the plant growth response of two Chenopodium ficifolium ecotypes from Portsmouth, NH (P2) and Quebec City, Quebec, Canada (QC4) to a commercial biostimulant (active ingredient Bacillus velezensis NCIMB 30322. The objective of this study was to evaluate the effect of a commercial biostimulant and nutrient-depleted conditions on the growth of two ecotypes of C. ficifolium. This is the first study to assess how a North American commercial biostimulant can affect the growth of Chenopodium spp. We hypothesized that the application of B. velezensis would promote growth and photosynthetic activity of two C. ficifolium ecotypes and that the two ecotypes would respond differently to the presence of the biostimulant under nutrient-depleted conditions. Our results show that B. velezensis NCIMB 30322 did not have a significant impact on biomass and chlorophyll content of either ecotype compared to the control but that the ecotypes do significantly differ from each other. Considering these results and the results of previous work with B. velezensis and quinoa, it is not clear if C. ficifolium and C. quinoa respond to B. velezensis in the same way, in order to support C. ficifolium as a plant-microbe interactions model for C. quinoa. More work is needed to directly compare growth of C. ficifolium, C. quinoa, and other Chenopodium species in response to the application of biostimulants.
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Comment cette classification a été obtenuedéplier
Prédiction machine sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Le volet Gemma est une étiquette directe du modèle pour chaque travail de la base, lue sur la notice réduite au titre. Le volet Codex est un classifieur appris des 10 348 étiquettes directes de Codex et calibré sur les taux pondérés de l'échantillon; les champs sans appui suffisant ne portent aucun appel Codex. Le mode candidate est l'union des deux volets; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont pas des étiquettes humaines.
Scores du classifieur distillé par catégorie (deux têtes)
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,001 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,001 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,002 | 0,001 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule source (Gemma direct ou Codex distillé), pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».