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Naslov:Different belowground responses to elevated ozone and soil water deficit in three European oak species (Quercus ilex, Q. pubescens and Q. robur)
Avtorji:Mrak, Tanja (Avtor)
Štraus, Ines (Avtor)
Grebenc, Tine (Avtor)
Gričar, Jožica (Avtor)
Hoshika, Yasutomo (Avtor)
Carriero, Giulia (Avtor)
Paoletti, Elena (Avtor)
Kraigher, Hojka (Avtor)
Jezik:Angleški jezik
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:Logo SciVie - Gozdarski inštitut Slovenije
Povzetek:Effects on roots due to ozone and/or soil water deficit often occur through diminished belowground allocation of carbon. Responses of root biomass, morphology, anatomy and ectomycorrhizal communities were investigated in seedlings of three oak species: Quercus ilex L., Q. pubescens Willd. and Q. robur L., exposed to combined effects of elevated ozone (ambient air and 1.4 x ambient air) and water deficit (100% and 10% irrigation relative to field capacity) for one growing season at a free-air ozone exposure facility. Effects on root biomass were observed as general reduction in coarse root biomass by -26.8 % and in fine root biomass by -13.1 % due to water deficit. Effect on coarse root biomass was the most prominent in Q. robur (-36.3 %). Root morphological changes manifested as changes in proportions of fine root (<2 mm) diameter classes due to ozone and water deficit in Q. pubescens and due to water deficit in Q. robur. In addition, reduced fine root diameter (-8.49 %) in Q. robur was observed under water deficit. Changes in root anatomy were observed as increased vessel density (+18.5 %) due to ozone in all three species, as reduced vessel tangential diameter (-46.7 %) in Q. ilex due to interaction of ozone and water, and as generally increased bark to secondary xylem ratio (+47.0 %) due to interaction of ozone and water. Water deficit influenced occurrence of distinct growth ring boundaries in roots of Q. ilex and Q. robur. It shifted the ectomycorrhizal community towards dominance of stress-resistant species, with reduced relative abundance of Tomentella sp. 2 and increased relative abundances of Sphaerosporella brunnea and Thelephora sp. Our results provide evidence that expression of stress effects varies between root traits; therefore the combined analysis of root traits is necessary to obtain a complete picture of belowground responses.
Ključne besede:ozone, drought, fine roots, ectomycorrhiza, anatomy, morphology, plants
Leto izida:2019
UDK:630*16:630*11
ISSN pri članku:0048-9697
OceCobissID:26369024 Povezava se odpre v novem oknu
COBISS_ID:5189798 Povezava se odpre v novem oknu
DOI:10.1016/j.scitotenv.2018.09.246 Povezava se odpre v novem oknu
Opombe:Soavtorji: Ines Štraus, Tine Grebenc, Jožica Gričar, Yasutomo Hoshika, Giulia Carriero, Elena Paoletti, Hojka Kraigher;
Število ogledov:1253
Število prenosov:701
Datoteke:URL URL - Predstavitvena datoteka, za dostop obiščite https://doi.org/10.1016/j.scitotenv.2018.09.246
.pdf PDF - Predstavitvena datoteka, prenos (1,03 MB)
 
Nadgradivo:Sci. total environ.
Elsevier
 
Metapodatki:XML RDF-CHPDL DC-XML DC-RDF
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Gradivo je financirano iz projekta

Financer:EC - European Commission
Program financ.:FP7
Številka projekta:315982
Naslov:European Forest Research and Innovation
Akronim:EUFORINNO

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