IMPACT OF FIELD-GROWN GENETICALLY MODIFIED CANOLA ON THE DIVERSITY OF RHIZOSPHERE AND ROOT-INTERIOR MICROBIAL COMMUNITIES
Notice bibliographique
Résumé
Transgenic or genetically modified plants possess novel genes that impart beneficial characteristics such as herbicide resistance. Unfortunately there is a paucity of information on the interaction and impact of transgenic plants on the soil microbial community. A 3-year field study was conducted to assess the effects of herbicide-tolerant genetically modified canola on \nmicrobial communities. Four genetically modified and four non -genetically modified canola \nvarieties were grown at six locations across Saskatchewan, Canada. The rhizosphere and root-interior microbial communities were characterized using community level physiological profiles (CLPP), fatty acid methyl ester analysis (FAME) and terminal amplified ribosomal DNA restriction analysis (T-ARDRA). The microbial communities associated with genetically modified canola \nvarieties were significantly different than the microbial communities associated with \nconventional canola varieties. However, this effect was dependent on the transgene. In \nparticular, the glyphosate-tolerant variety Quest supported a unique microbial community \ncompared to the communities supported by the four conventional varieties and three \nglufosinate ammonium-tolerant varieties tested. Analysis of rhizosphere microbial communities associated with canola throughout the field season demonstrated that these communities are \nsubject to (after plants were harvested in the seasonal variation. Importantly, in April preceding \nSeptember) no differences were observed between microbial communities from field plots that \ncontained harvested transgenic canola stubble and field plots that contained no plants during the field season, demonstrating that the effect of transgenic plants on the microbial community was temporary. The composition and functional diversity of microbial communities from \nfallow soil and rhizosphere and root-interior microbial communities associated with canola plants were significantly influenced by field site. Furthermore, field site interacted with plant variety in its influence on the microbial community. The effect of plant variety on the microbial community at one field site was sometimes entirely different in another field site. Therefore, generalizations about the effect of genetically modified plants on all soil microbial communities are not possible. The interaction between microbial communities, transgenic plants and field site, along with the season variability in microbial communities documented in this study \nemphasizes the complexity and need for a multifaceted approach to study the risks of \ntransgenic plants to the diversity of the microbial community.
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Comment cette classification a été obtenuedéplier
Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 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 | 0,001 | 0,001 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,004 | 0,000 |
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 tête enseignante, 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 ».