Vpliv stresnih dejavnikov na vsebnost kapsaicinoidov ter drugih metabolitov v čilijih (Capsicum spp.)

Zamljen, Tilen (avtor), Slatnar, Ana (mentor)

V doktorski disertaciji smo preučevali metabolni odziv čilijev (Capsicum spp.) na nivoju različnih vrst, sort, plodov etaž iste rastline ter treh delov ploda (perikarp, placenta, seme). Vsebnost primarnih in sekundarnih metabolitov ter encimsko aktivnost smo spremljali v čilijih, izpostavljenih različnim stresnim razmeram ter škropljenju z biostimulanti na osnovi hidroliziranih živalskih proteinov in izvlečkov zelenih alg. Različni deli ploda čilijev se zelo razlikujejo v vsebnosti primarnih in sekundarnih metabolitov. Razlike med vrstami in sortami so bile največje v vsebnosti fenolnih snovi in kapsaicinoidov. Metabolni odziv čilijev na sušo, slanost in napad škodljivca je bil večji na nivoju sekundarnega (fenolnih snovi, kapsaicinoidov) kot primarnega metabolizma. Suša je vplivala na sprejem in translokacijo dušika po rastlini, kar prav tako vpliva na metabolizem analiziranih snovi. Z aplikacijo različnih biostimulantov smo ugotavljali odziv na encimskem in metabolnem nivoju. Odziv rastline se je prvo uro po nanosu zgodil na encimski ravni, v naslednjih treh urah pa na metabolni ravni v perikarpu in placenti. Vpliv na sekundarni metabolizem je bil večji kot na primarni metabolizem. Učinek biostimulanta na encimsko aktivnost in metabolno sestavo se pri čilijih z naraščanjem slanosti povečuje.

• Jezik: Slovenski jezik
• Ključne besede: abiotski stres, biostimulanti, biotski stres, encimi, kapsaicinoidi
• Vrsta gradiva: Doktorsko delo/naloga
• Tipologija: 2.08 - Doktorska disertacija
• Organizacija: BF - Biotehniška fakulteta
• Leto izida: 2023
• PID: 20.500.12556/RUL-151216
• COBISS.SI-ID: 166717187
• Datum objave v RUL: 01.10.2023

ZAMLJEN, Tilen, 2023, Vpliv stresnih dejavnikov na vsebnost kapsaicinoidov ter drugih metabolitov v čilijih (Capsicum spp.) [na spletu]. Doktorska disertacija. [Dostopano 4 maj 2025]. Pridobljeno s: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=slv&id=151216

Sekundarni jezik

• Jezik: Angleški jezik
• Naslov: Impact of stress factors on the content of capsaicinoids and other metabolites in chili peppers (Capsicum spp.)

Izvleček

In the dissertation, we studied the metabolic response of chilies (Capsicum spp.) based on species, cultivar, fruit position on the plant, and three fruit parts (pericarp, placenta, seed). Primary and secondary metabolites and enzymatic activity were studied in chilies exposed to different abiotic and biotic stressors and treated with different biostimulants based on hydrolyzed animal protein and algal extracts. The different fruit parts of chilies are very different in terms of primary and secondary metabolites. The differences between species and cultivars were greatest in the content of phenols and capsaicinoids. The metabolic response of chilies to drought, salinity, and pest infestation was higher at the level of secondary metabolites (phenols, capsaicinoids) than at the level of primary metabolites. Drought affected the uptake and translocation of nitrogen by the plant, which also affected the metabolism of the metabolites analyzed. By using different biostimulants, we studied the response of chili at enzymatic and metabolic levels. The response of chili occurred at the enzymatic level in the first hour after application and at the metabolic level in the pericarp and placenta in the next three hours. The effect on secondary metabolism was stronger than on primary metabolism. The efficacy of the biostimulant increases with increasing salt concentration.

• Ključne besede: Abiotic stress, biostimulants, biotic stress, enzymes, capsaicinoids