Ectomycorrhizal colonization and growth of the hybrid larch F1 under elevated CO2 and O3. (February 2015)

• Record Type: Journal Article
• Authors: Wang, Xiaona; Qu, Laiye; Mao, Qiaozhi; Watanabe, Makoto; Hoshika, Yasutomo; Koyama, Akihiro; Kawaguchi, Korin; Tamai, Yutaka; Koike, Takayoshi
• Is Part Of: Environmental pollution. Volume 197(2015)
• Page Start: 116
• Page End: 126
• Publication Date: 2015-02
• Subjects: Ectomycorrhiza -- Elevated ozone -- Elevated CO2 -- Hybrid larch F1 -- Species richness; Pollution -- Periodicals; Pollution -- Environmental aspects -- Periodicals; Environmental Pollution -- Periodicals; Pollution -- Périodiques; Pollution -- Aspect de l'environnement -- Périodiques; Pollution -- Effets physiologiques -- Périodiques; Pollution; Pollution -- Environmental aspects; Periodicals; Electronic journals; 363.73
• DOI: 10.1016/j.envpol.2014.11.031
• Languages: English
• ISSNs: 0269-7491

Abstract

Abstract: We studied the colonization of ectomycorrhizal fungi and species abundance of a hybrid larch (F1 ) under elevated CO2 and O3. Two-year-old seedlings were planted in an Open-Top-Chamber system with treatments: Control (O3 < 6 nmol/mol), O3 (60 nmol/mol), CO2 (600 μmol/mol), and CO2 + O3 . After two growing seasons, ectomycorrhiza (ECM) colonization and root biomass increased under elevated CO2 . Additionally, O3 impaired ECM colonization and species richness, and reduced stem biomass. However, there was no clear inhibition of photosynthetic capacity by O3 . Concentrations of Al, Fe, Mo, and P in needles were reduced by O3, while K and Mg in the roots increased. This might explain the distinct change in ECM colonization rate and diversity. No effects of combined fumigation were observed in any parameters except the P concentration in needles. The tolerance of F1 to O3 might potentially be related to a shift in ECM community structure. Highlights: Elevated CO2 enhanced growth of hybrid larch F1 (F1 ). ECM colonization rate and species richness of ECM were reduced by O3 . Species abundance of ECM community differed between O3 and control. F1 potentially resisted O3 impacts via specific selection of Suillus spp. for element uptake. Abstract : Elevated CO2 moderated the negative effects of O3 on the growth of hybrid larch F1, by stimulating ectomycorrhizas and nutrient uptake.