Utjecaj ekstremnih uvjeta nedostatka vlage na mikrobiom tla

master's thesis

• Title (english): The impact of extreme drought conditions on soil microbiome
• Author: Magdalena Hižak
• Mentor: Ivana Rajnović (mentor)
• Mentor: Ivana Babić (mentor)
• Committee member: Ivana Rajnović (predsjednik povjerenstva)
• Committee member: Ivana Babić (član povjerenstva)
• Committee member: Nataša Hulak (član povjerenstva)
• Committee member: Aleksandra Perčin (član povjerenstva)
• Granter: University of Zagreb; Faculty of Agriculture; (Department of Microbiology); Zagreb
• Defense date and country: 2024-06-11, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Agronomy

Abstract

Sve učestalije ekstremne vremenske prilike, uključujući sušu, stvaraju izazove za poljoprivredu uzrokujući smanjenje prinosa i degradaciju kvalitete tla. Istraživanje prilagodbe bakterijskih zajednica u tlu na sušne uvjete i njihove interakcije s biljkama postaju ključni faktori za očuvanje poljoprivrede. U ovom radu, iz 14 uzoraka tla prikupljenih nakon izlaganja kratkotrajnoj suši (10 dana) identificirano je 29 bakterijskih koljena i 234 porodice. Unatoč razlikama u brojnosti koljena između sušnih i kontrolnih tala, Proteobacteria i Actinobacteriota ističu se kao dva najzastupljenija koljena. Mikrobne zajednice nisu se značajno razlikovale između sušnih i kontrolnih tala, no u uzorcima suše zabilježeno je značajno smanjenje brojnosti koljena Gemmatimonadetes te povećanje aktivnosti aril-sulfataze. Ovaj rad ističe složenost interakcija između tla, mikroorganizama i sušnih uvjeta, naglašavajući nužnost istraživanja prilagodbe mikrobioma tla kao odgovora na promjene u okolišu kako bi se očuvala poljoprivredna produktivnost i kvaliteta tla.

Abstract (english)

Various extreme weather events, including drought, are becoming more common and challenge the agriculture by reducing yields and degrading soil quality. Research on soil bacterial community adaptation to drought conditions and their interaction with plants is becoming crucial for sustainable agriculture. In this study, 29 bacterial phyla and 234 families, were identified in 14 soil samples collected after short-term drought exposure (10 days). Despite differences in the abundance of phyla between drought and control soils, Proteobacteria and Actinobacteriota were the two most dominant phyla. Microbial communities did not differ significantly between drought and control soils, but a significant decrease in the abundance of Gemmatimonadetes and an increase in arylsulfatase activity were observed in drought samples. In conclusion, this study highlights the complexity of interactions between soil, microorganisms and drought conditions, emphasizing the need for research on soil microbiome adaptation to environmental changes to preserve agricultural productivity and soil quality.

• Keywords: suša; mikrobiom tla; PGPB; mikrobni ekstracelularni enzimi
• Keywords (english): drought; soil microbiome; PGPB; microbial extracellular enzymes
• Language: croatian
• URN:NBN: urn:nbn:hr:204:958311
• Study programme: Title: Agroecology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/ magistra inženjer/inženjerka agroekologije (magistar/ magistra inženjer/inženjerka agroekologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Access restricted to students and staff of home institution
• Created on: 2024-06-13 11:18:17