Zea mays rhizosphere respiration, but not soil organic matter decomposition was stable across a temperature gradient

Sara Vicca; Ivan A. Janssens; Suan Chin Wong; Lucas A. Cernusak; Graham D. Farquhar

doi:10.1016/j.soilbio.2010.07.023

Zea mays rhizosphere respiration, but not soil organic matter decomposition was stable across a temperature gradient

Sara Vicca^*, Ivan A. Janssens, Suan Chin Wong, Lucas A. Cernusak, Graham D. Farquhar

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

In a greenhouse experiment, we grew maize plants at different densities. We added fertilizer to half of the pots and created a temperature gradient. After 10 weeks of plant growth, we measured soil CO₂ efflux (SCE) and determined rhizosphere respiration (R_rhizo) and the decomposition rate of soil organic matter (R_SOM) using the different δ¹³C of the C₃ soil and C₄ plants. Whereas R_rhizo remained stable across the temperature gradient, R_SOM significantly increased with growth temperature. Neither plant density, nor the fertilizer treatment affected the relation between R_rhizo or R_SOM and growth temperature. Although R_rhizo might still increase with temperature in the short term, long term exposure to higher temperatures revealed full thermal acclimation of R_rhizo, but not of R_SOM.

Original language	English
Pages (from-to)	2030-2033
Number of pages	4
Journal	Soil Biology and Biochemistry
Volume	42
Issue number	11
DOIs	https://doi.org/10.1016/j.soilbio.2010.07.023
Publication status	Published - Nov 2010

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title = "Zea mays rhizosphere respiration, but not soil organic matter decomposition was stable across a temperature gradient",

abstract = "In a greenhouse experiment, we grew maize plants at different densities. We added fertilizer to half of the pots and created a temperature gradient. After 10 weeks of plant growth, we measured soil CO2 efflux (SCE) and determined rhizosphere respiration (Rrhizo) and the decomposition rate of soil organic matter (RSOM) using the different δ13C of the C3 soil and C4 plants. Whereas Rrhizo remained stable across the temperature gradient, RSOM significantly increased with growth temperature. Neither plant density, nor the fertilizer treatment affected the relation between Rrhizo or RSOM and growth temperature. Although Rrhizo might still increase with temperature in the short term, long term exposure to higher temperatures revealed full thermal acclimation of Rrhizo, but not of RSOM.",

keywords = "Rhizosphere respiration, Soil CO efflux, Soil organic matter decomposition, Stable carbon isotopes, Temperature gradient, Thermal acclimation",

author = "Sara Vicca and Janssens, {Ivan A.} and Wong, {Suan Chin} and Cernusak, {Lucas A.} and Farquhar, {Graham D.}",

year = "2010",

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doi = "10.1016/j.soilbio.2010.07.023",

language = "English",

volume = "42",

pages = "2030--2033",

journal = "Soil Biology and Biochemistry",

issn = "0038-0717",

publisher = "Elsevier Ltd.",

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TY - JOUR

T1 - Zea mays rhizosphere respiration, but not soil organic matter decomposition was stable across a temperature gradient

AU - Vicca, Sara

AU - Janssens, Ivan A.

AU - Wong, Suan Chin

AU - Cernusak, Lucas A.

AU - Farquhar, Graham D.

PY - 2010/11

Y1 - 2010/11

N2 - In a greenhouse experiment, we grew maize plants at different densities. We added fertilizer to half of the pots and created a temperature gradient. After 10 weeks of plant growth, we measured soil CO2 efflux (SCE) and determined rhizosphere respiration (Rrhizo) and the decomposition rate of soil organic matter (RSOM) using the different δ13C of the C3 soil and C4 plants. Whereas Rrhizo remained stable across the temperature gradient, RSOM significantly increased with growth temperature. Neither plant density, nor the fertilizer treatment affected the relation between Rrhizo or RSOM and growth temperature. Although Rrhizo might still increase with temperature in the short term, long term exposure to higher temperatures revealed full thermal acclimation of Rrhizo, but not of RSOM.

AB - In a greenhouse experiment, we grew maize plants at different densities. We added fertilizer to half of the pots and created a temperature gradient. After 10 weeks of plant growth, we measured soil CO2 efflux (SCE) and determined rhizosphere respiration (Rrhizo) and the decomposition rate of soil organic matter (RSOM) using the different δ13C of the C3 soil and C4 plants. Whereas Rrhizo remained stable across the temperature gradient, RSOM significantly increased with growth temperature. Neither plant density, nor the fertilizer treatment affected the relation between Rrhizo or RSOM and growth temperature. Although Rrhizo might still increase with temperature in the short term, long term exposure to higher temperatures revealed full thermal acclimation of Rrhizo, but not of RSOM.

KW - Rhizosphere respiration

KW - Soil CO efflux

KW - Soil organic matter decomposition

KW - Stable carbon isotopes

KW - Temperature gradient

KW - Thermal acclimation

UR - http://www.scopus.com/inward/record.url?scp=77956783814&partnerID=8YFLogxK

U2 - 10.1016/j.soilbio.2010.07.023

DO - 10.1016/j.soilbio.2010.07.023

M3 - Article

SN - 0038-0717

VL - 42

SP - 2030

EP - 2033

JO - Soil Biology and Biochemistry

JF - Soil Biology and Biochemistry

IS - 11

ER -

Zea mays rhizosphere respiration, but not soil organic matter decomposition was stable across a temperature gradient

Abstract

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