Moving carbon between spheres, the potential oxalate-carbonate pathway of Brosimum alicastrum Sw.; Moraceae.

Rowley, M.C., Estrada-Medina, H., Tzec-Gamboa, M., Rozin, A., Cailleau, G., Verrecchia, E.P. and Green, I. D., 2017. Moving carbon between spheres, the potential oxalate-carbonate pathway of Brosimum alicastrum Sw.; Moraceae. Plant and Soil: international journal on plant-soil relationships. (In Press)

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DOI: 10.1007/s11104-016-3135-3

Abstract

Aims The Oxalate-Carbonate Pathway (OCP) is a biogeochemical process that transfers atmospheric CO2 into the geologic reservoir as CaCO3; however, until now all investigations on this process have focused on species with limited food benefits. This study evaluates a potential OCP associated with Brosimum alicastrum, a Neotropical species with agroforestry potential (ca. 70–200 kg-nuts yr−1), in the calcareous soils of Haiti and Mexico. Methods / results Enzymatic analysis demonstrated significant concentrations of calcium oxalate (5.97 % D.W.) were associated with B. alicastrum tissue in all sample sites. The presence of oxalotrophism was also confirmed with microbiological analyses in both countries. High concentrations of total calcium (>7 g kg−1) and lithogenic carbonate obscured the localised alkalinisation and identification of secondary carbonate associated with the OCP at most sample sites, except Ma Rouge, Haiti. Soils adjacent to subjects in Ma Rouge demonstrated an increase in pH (0.63) and CaCO3 concentration (5.9 %) that, when coupled with root-like secondary carbonate deposits in Mexico, implies that the OCP does also occur in calcareous soils. Conclusions Therefore this study confirms that the OCP also occurs in calcareous soils, adjacent to B. alicastrum, and could play a fundamental and un-accounted role in the global calcium-carbon coupled cycle.

Item Type:Article
ISSN:1573-5036
Additional Information:Oxalate-Carbonate Pathway(OCP; Brosimum alicastrum; Calcium oxalate; Carbon-calciumcycle; Oxalotrophic bacteria
Subjects:UNSPECIFIED
Group:Faculty of Science & Technology
ID Code:25035
Deposited By: Unnamed user with email symplectic@symplectic
Deposited On:01 Dec 2016 15:04
Last Modified:10 Jan 2017 11:21

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