Soil properties and microbial functional structure in the rhizosphere of Pinus densiflora (S. and Z.) exposed to elevated atmospheric temperature and carbon dioxide

V.U. Ultra Jr., S.-H. Han, D.-H. Kim

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Abstract

Rhizosphere-induced changes of Pinus densiflora (S. and Z.) grown at elevated atmospheric temperature and carbon dioxide are presented based on experiments carried out in a two-compartment rhizobag system filled with forest soil in an environmentally controlled walk-in chamber with four treatment combinations: control (25°C, 500 μmol mol-1 CO2), T2 (30°C, 500 μmol mol-1 CO2), T3 (25°C, 800 μmol mol-1 CO2), and T4 (30°C, 800 μmol mol-1 CO2). Elevated temperature and atmospheric carbon dioxide resulted in higher concentration of sugars and dissolved organic carbon in soil solution, especially at the later period of plant growth. Soil solution pH from the rhizosphere became less acidic than the bulk soil regardless of treatment, while the electrical conductivity of soil solution from the rhizosphere was increased by elevated carbon dioxide treatment. Biolog EcoPlate™ data showed that the rhizosphere had higher average well color development, Shannon-Weaver index, and richness of carbon utilization compared with bulk soil, indicating that microbial activity in the rhizosphere was higher and more diverse than in bulk soil. Subsequent principal component analysis indicated separation of soil microbial community functional structures in the rhizosphere by treatment. The principal components extracted were correlated to plant-induced changes of substrate quality and quantity in the rhizosphere as plants' response to varying temperature and atmospheric carbon dioxide. © 2012 The Japanese Forest Society and Springer.
Original languageEnglish
Pages (from-to)149-158
Number of pages10
JournalJournal of Forest Research
Volume18
Issue number2
DOIs
Publication statusPublished - 2013

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Pinus densiflora
rhizosphere
soil properties
soil property
air temperature
carbon dioxide
temperature
soil
soil solution
forest soil
microbial activity
dissolved organic carbon
electrical conductivity
soil treatment
microbial community
sugar
principal component analysis
forest soils
microbial communities
plant response

Cite this

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title = "Soil properties and microbial functional structure in the rhizosphere of Pinus densiflora (S. and Z.) exposed to elevated atmospheric temperature and carbon dioxide",
abstract = "Rhizosphere-induced changes of Pinus densiflora (S. and Z.) grown at elevated atmospheric temperature and carbon dioxide are presented based on experiments carried out in a two-compartment rhizobag system filled with forest soil in an environmentally controlled walk-in chamber with four treatment combinations: control (25°C, 500 μmol mol-1 CO2), T2 (30°C, 500 μmol mol-1 CO2), T3 (25°C, 800 μmol mol-1 CO2), and T4 (30°C, 800 μmol mol-1 CO2). Elevated temperature and atmospheric carbon dioxide resulted in higher concentration of sugars and dissolved organic carbon in soil solution, especially at the later period of plant growth. Soil solution pH from the rhizosphere became less acidic than the bulk soil regardless of treatment, while the electrical conductivity of soil solution from the rhizosphere was increased by elevated carbon dioxide treatment. Biolog EcoPlate™ data showed that the rhizosphere had higher average well color development, Shannon-Weaver index, and richness of carbon utilization compared with bulk soil, indicating that microbial activity in the rhizosphere was higher and more diverse than in bulk soil. Subsequent principal component analysis indicated separation of soil microbial community functional structures in the rhizosphere by treatment. The principal components extracted were correlated to plant-induced changes of substrate quality and quantity in the rhizosphere as plants' response to varying temperature and atmospheric carbon dioxide. {\circledC} 2012 The Japanese Forest Society and Springer.",
author = "{Ultra Jr.}, V.U. and S.-H. Han and D.-H. Kim",
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T1 - Soil properties and microbial functional structure in the rhizosphere of Pinus densiflora (S. and Z.) exposed to elevated atmospheric temperature and carbon dioxide

AU - Ultra Jr., V.U.

AU - Han, S.-H.

AU - Kim, D.-H.

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N2 - Rhizosphere-induced changes of Pinus densiflora (S. and Z.) grown at elevated atmospheric temperature and carbon dioxide are presented based on experiments carried out in a two-compartment rhizobag system filled with forest soil in an environmentally controlled walk-in chamber with four treatment combinations: control (25°C, 500 μmol mol-1 CO2), T2 (30°C, 500 μmol mol-1 CO2), T3 (25°C, 800 μmol mol-1 CO2), and T4 (30°C, 800 μmol mol-1 CO2). Elevated temperature and atmospheric carbon dioxide resulted in higher concentration of sugars and dissolved organic carbon in soil solution, especially at the later period of plant growth. Soil solution pH from the rhizosphere became less acidic than the bulk soil regardless of treatment, while the electrical conductivity of soil solution from the rhizosphere was increased by elevated carbon dioxide treatment. Biolog EcoPlate™ data showed that the rhizosphere had higher average well color development, Shannon-Weaver index, and richness of carbon utilization compared with bulk soil, indicating that microbial activity in the rhizosphere was higher and more diverse than in bulk soil. Subsequent principal component analysis indicated separation of soil microbial community functional structures in the rhizosphere by treatment. The principal components extracted were correlated to plant-induced changes of substrate quality and quantity in the rhizosphere as plants' response to varying temperature and atmospheric carbon dioxide. © 2012 The Japanese Forest Society and Springer.

AB - Rhizosphere-induced changes of Pinus densiflora (S. and Z.) grown at elevated atmospheric temperature and carbon dioxide are presented based on experiments carried out in a two-compartment rhizobag system filled with forest soil in an environmentally controlled walk-in chamber with four treatment combinations: control (25°C, 500 μmol mol-1 CO2), T2 (30°C, 500 μmol mol-1 CO2), T3 (25°C, 800 μmol mol-1 CO2), and T4 (30°C, 800 μmol mol-1 CO2). Elevated temperature and atmospheric carbon dioxide resulted in higher concentration of sugars and dissolved organic carbon in soil solution, especially at the later period of plant growth. Soil solution pH from the rhizosphere became less acidic than the bulk soil regardless of treatment, while the electrical conductivity of soil solution from the rhizosphere was increased by elevated carbon dioxide treatment. Biolog EcoPlate™ data showed that the rhizosphere had higher average well color development, Shannon-Weaver index, and richness of carbon utilization compared with bulk soil, indicating that microbial activity in the rhizosphere was higher and more diverse than in bulk soil. Subsequent principal component analysis indicated separation of soil microbial community functional structures in the rhizosphere by treatment. The principal components extracted were correlated to plant-induced changes of substrate quality and quantity in the rhizosphere as plants' response to varying temperature and atmospheric carbon dioxide. © 2012 The Japanese Forest Society and Springer.

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