Salicylic acid and jasmonic acid can suppress green and blue moulds of citrus fruit and induce the activity of polyphenol oxidase and peroxidase
| Autor: | Shahbaz Talib Sahi, Anam Moosa, Aman Ullah Malik, Sajid Aleem Khan |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
enzymes Horticulture 01 natural sciences Polyphenol oxidase SB1-1110 post-harvest 03 medical and health sciences chemistry.chemical_compound food penicillium digitatum Meyer lemon p. italicum 030304 developmental biology 0303 health sciences Penicillium digitatum biology Inoculation Chemistry Jasmonic acid food and beverages Plant culture biology.organism_classification food.food Point of delivery resistance inducers biology.protein Salicylic acid 010606 plant biology & botany Peroxidase |
| Zdroj: | Folia Horticulturae, Vol 31, Iss 1, Pp 195-204 (2019) |
| ISSN: | 2083-5965 |
| DOI: | 10.2478/fhort-2019-0014 |
| Popis: | The ability of salicylic acid and jasmonic acid to suppress post-harvest infection with green mould Penicillium digitatum and blue mould P. italicum on three citrus species Citrus reticulata ‘Kinnow’, C. limon ‘Meyer Lemon’, and C. limetta ‘Mosambi’ was evaluated in a dose-response study. Salicylic acid (SA) and jasmonic acid (JA) were applied to the fruits as a post-harvest dip treatment followed by wound inoculation with the pathogens. Both resistance inducers caused a significantly lower disease severity compared with the infected but non-treated control, whereas disease incidence was not significantly lower than in the control. The efficacy of both SA and JA in reducing disease severity was concentration-dependent; the use of higher concentrations resulted in a greater degree of suppression. All the Citrus species tested in this study showed different responses in terms of disease development. C. limon ‘Meyer Lemon’ showed the highest disease development, and C. limetta ‘Mosambi’ the lowest. To get an insight into the mechanisms underlying the increase in resistance, the activity of defence-related enzymes – peroxidase (POD) and polyphenol oxidase (PPO) – was recorded in SA- and JA-treated fruit peelings. The activity of both enzymes was directly proportional to the concentration of the SA and JA applications. The highest activity of PPO and POD was observed in C. reticulata ‘Kinnow’ and the lowest in C. limon ‘Meyer Lemon’ fruits. This study is the first to document an increase in the activity of PPO and POD in SA- and JA-treated Citrus species in the presence of blue mould and green mould pathogens. |
| Databáze: | OpenAIRE |
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