Occurence of Fusarium equiseti Corda (Saccardo) as causal agent of seed rot of Hyssopus officinalis L.
Notice bibliographique
Résumé
Hyssop (Hyssopus officinalis L.) is a perennial polymorphous plant species with essential oil mainly accumulated in the flowers and leaves. It is grown in Serbia for the needs of pharmaceutical companies and tea production, because of its quality and chemical composition. During a routine quality control of hyssop seeds collected from Rumenka (Vojvodina Province), in 2018, fungal infection followed by seed rot was noticed on an average of 22%. Infected seeds were covered with white mycelium followed with violet pigmentation occurring under the seeds. The presence of Fusarium spp. was confirmed with microscopic observation. Isolation was done aseptically by arranging infected seeds onto surface of potato dextrose agar (PDA), and incubated at 25 °C with a 12-h photoperiod (Mathur and Kongsdall, 2003). After seven days, 12 Fusarium spp. isolates were designated as JBL 4003/1 - 4003/12. Pathogenicity test was performed in vitro using a modified agar slant method in the test tube with PDA amended. After 10 days, fungal mycelia of tested isolates caused seed rot and seedling decay, like naturally infected hyssop seeds. All isolates were re-isolated and sub-cultured on Potato Dextrose Agar (PDA) and Carnation Leaf Agar (CLA) using a hyphal tip transfer technique, fulfilling Koch's postulates. Isolate JBL 4003/1 was distinguished based on pathogenicity and cultural characteristics. It caused seed rot after four days, on PDA colony was fast growing reaching 6-8 cm in diam. in five days, forming abundant, whitish to peach aerial mycelium followed with beige to light brown pigmentation in agar. Isolate formed relatively long and narrow macroconidia (24 to 54 × 3.2 to 4.5 μm) with a tapered and elongated apical cell and prominent foot-shaped basal cell, with four to six septate, with no microconidia. Chlamydospores were solitary and intercalary. Based cultural and morphological characteristics indicated that the isolate belong to species Fusarium equiseti Corda (Saccardo). To obtain a DNA sequence-based identification, total DNA was extracted directly from the mycelium. Following DNA extraction, the translation elongation factor 1-alpha region was amplified by PCR using the primer pair EF1 and EF2. The amplified and purified DNA fragment of chosen isolate JBL4003/1 was sequenced in both directions and deposited in the GeneBank under Accession Number MK061540.1. BLAST analysis revealed that the Serbian isolate MK061540 showed the highest nucleotide identity of 100% with F. equiseti isolates from United States (MG826890), Canada (KU587617), Turkey (KT286761), and Serbia (JQ412101). Based on morphological and pathogenic properties, as well as the sequence analysis, to our knowledge, this is the first case of F. equiseti Corda (Saccardo) as the causal agent of Hyssopus officinalis (L.) seed rot in Serbia. Considering the importance of H. Officinalis in pharmaceutical industries, knowledge of the composition of populations of Fusarium species transmitted by hyssop.
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
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) | 0,000 | 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 ».