Okužba rastline z določenimi patogeni vpliva na njene metabolne procese in posledično na vsebnosti primarnih in sekundarnih metabolitov v njenih tkivih. Naša naloga je bila ugotoviti ali črna listna pegavost (Colletotrichum nymphaeae (Pass.) Aa.) vpliva na spremembe v metabolnih procesih na vrtnem jagodnjaku (Fragaria × ananassa Duch.) in na kakšen način. Poleg tega pa smo sočasno preverjali tudi kakšen vpliv imajo na vsebnost primarnih in sekundarnih metabolitov določena sredstva, ki imajo potencialni fungiciden učinek in kako zavirajo razvoj bolezni. Ugotovili smo, da okuženost s črno pegavostjo zmanjša vsebnosti skupnih sladkorjev in skupnih kislin. Povečajo pa se vsebnosti skupnih fenolov. Po skupinah fenolov, ki smo jih preučevali se od njih najbolj povečajo vsebnosti skupnih flavanolov in hidroksicimetnih kislin. Sredstvi, ki smo jih uporabili (ocetna kislina in kalijev hidrogen karbonat) sta v primerjavi s kontrolo zmanjšala okuženost plodov. Uporabljeni sredstvi nista imeli značilnega vpliva na vsebnosti primarnih in sekundarnih metabolitov. Omeniti velja le, da je škropljenje s kalijevim hidrogen karbonatom povzročilo večjo vsebnost skupnih kislin v plodu.
| Language: | English |
|---|
| Title: | Response of strawberry (Fragaria x ananassa Duch.) on infection with strawberry black spot (Colletotrichum nymphaeae (Pass.)Aa.) |
|---|
| Abstract: |
|---|
Infection of plants with some pathogen affects on metabolic processes and consequently on the value of its primary and secondary matabolites in tissues. Our task was to determine if strawberry black spot (Colletotrichum nymphaeae (Pass.)Aa.) have the impact on metabolic processes in strawberry (Fragaria x ananassa Duch.). We examined the influence of disease on primary and secondary metabolites and by the way we examined the influence of acetic acid and potassium bicarbonate on disease growth and metabolic processes. We found that the infection with Colletotrichum nymphaeae reduce the amount of total sugars and total acids and increase total phenolic compounds in strawberry fruit. Most remarkable increases with infection had flavanols and hydroxycinnamic acids. Spraying with acetic acid and potassium bicarbonate gave good result in suppresing fungal growth but they do not have any impact on values of primary and secondary metabolites. Only potassium bicarbonate produce higher value of total acids in the fruit.
|
| Keywords: | Strawberries, fragaria x ananassa, black spot, Colletotrichum nymphaeae, infection, disease growth, metabolic process, primary metabolites, secondary metabolites, organic acids, sugars, phenolic compounds |
|---|
