Evaluation of an alternative mean for controlling postharvest Rhizopus rot of strawberries
| Autor: | De Corato, Ugo, Salimbeni, Rocco, De Pretis, Agostino |
|---|---|
| Přispěvatelé: | De Corato, U. |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
phenolic compound Peroxidase activity Laminaria digitata (Huds.) Lamouroux crude extract 01 natural sciences lcsh:QK1-989 010602 entomology lcsh:Biology (General) Crude extract Phenolic compound Fatty acid Laminaria digitata (huds.) lamouroux lcsh:Botany fatty acid lcsh:QH301-705.5 010606 plant biology & botany |
| Zdroj: | Advances in Horticultural Science, Vol 32, Iss 3 (2018) |
| ISSN: | 1592-1573 0394-6169 |
| Popis: | Crude extract of the brown seaweed Laminaria digitata was tested as an alternative mean to control postharvest Rhizopus rot of strawberries. The antifungal activity of four extracts (one un-fractionated and three soluble by hexane, ethanol, and water) was in vitro measured against one pathogenic isolate of Rhizopus stolonifer at a concentration range from 10 g L-1 to 30 g L-1. The antifungal activity of the un-fractionated extract was in vivo measured into a climatic room at the same concentration range in comparison to fungicide Fenhexamid in preventive and curative treatments. The peroxidase activity in L. digitata-treated inoculated strawberries was performed. A significant inhibition of mycelia growth applying 30 g L-1 of un-fractionated extract (until 80% after 5 days) and suppression of sporangia germination (until 95% after 24 hours) were found by a dose-dependent manner of the treatment. Only the extracts fractionated by hexane and ethanol were likewise suppressive at the same concentrations against mycelia (until 71% and 66% respectively) and sporangia (until 82% and 69% respectively) such involving a direct toxicity induced by lipids and phenolic compounds to R. stolonifer suppression. Fruit decay inhibition of the R. stolonifer/strawberries pathosystem increased from 10 g L-1 to 30 g L-1 until 75% after 4 days only in preventive treatment. An increased peroxidase activity (4.84 ΔOD420 g-1 min-1) seen in fruit tissue after one-day from the application of 30 g -1 raw extract suggests that in vivo suppression could also be related to induced systemic resistance phenomena. Advances in Horticultural Science, Vol 32 No 3 (2018): Special issue on Postharvest |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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