Recalcitrant carbon components in glomalin-related soil protein facilitate soil organic carbon preservation in tropical forests

Abstract Glomalin-related soil protein (GRSP) is known as an important microbial by-product which is crucial for preserving or accumulating soil organic carbon (SOC). However, the underlying mechanisms are not well understood. In this study, we investigated the chemical structures of GRSP and its re...

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Autores principales:	Jing Zhang, Xuli Tang, Siyuan Zhong, Guangcai Yin, Yifei Gao, Xinhua He
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/dcf766edc3714f3fa7b61119d0998ce6
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spelling	oai:doaj.org-article:dcf766edc3714f3fa7b61119d0998ce62021-12-02T16:05:58ZRecalcitrant carbon components in glomalin-related soil protein facilitate soil organic carbon preservation in tropical forests10.1038/s41598-017-02486-62045-2322https://doaj.org/article/dcf766edc3714f3fa7b61119d0998ce62017-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-02486-6https://doaj.org/toc/2045-2322Abstract Glomalin-related soil protein (GRSP) is known as an important microbial by-product which is crucial for preserving or accumulating soil organic carbon (SOC). However, the underlying mechanisms are not well understood. In this study, we investigated the chemical structures of GRSP and its relationship with SOC using 13C nuclear magnetic resonance (NMR) in three tropical forests. The three forests, including a planted forest (PF), a secondary forest (MF) and a primary forest (BF), were selected to represent the natural successional process after disturbance in southern China. Results showed that the average concentrations of GRSP were (3.94 ± 1.09) mg cm−3 and accounting for (3.38 ± 1.15)% of the SOC in the top 10 cm soil. NMR analysis indicated rich aromatic C (~30%) and carboxyl C (~40%) in GRSP, and abundant alkyl C (~30%) and O-alkyl C (~50%) in SOC. The recalcitrance indexes (RI), as defined as the ratio of sum of alkyl C and aromatic C over sum of O-alkyl C and carboxyl C, was (98.6 ± 18.9)%, (145.5 ± 10.9)% and (20.7 ± 0.3)% in GRSP higher than that in SOC in the PF, MF and BF, respectively. This study demonstrated that the stubborn structure of GRSP probably regulate the resistance of SOC sequestration in tropical forests, especially in the planted and secondary forests.Jing ZhangXuli TangSiyuan ZhongGuangcai YinYifei GaoXinhua HeNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jing Zhang Xuli Tang Siyuan Zhong Guangcai Yin Yifei Gao Xinhua He Recalcitrant carbon components in glomalin-related soil protein facilitate soil organic carbon preservation in tropical forests
description	Abstract Glomalin-related soil protein (GRSP) is known as an important microbial by-product which is crucial for preserving or accumulating soil organic carbon (SOC). However, the underlying mechanisms are not well understood. In this study, we investigated the chemical structures of GRSP and its relationship with SOC using 13C nuclear magnetic resonance (NMR) in three tropical forests. The three forests, including a planted forest (PF), a secondary forest (MF) and a primary forest (BF), were selected to represent the natural successional process after disturbance in southern China. Results showed that the average concentrations of GRSP were (3.94 ± 1.09) mg cm−3 and accounting for (3.38 ± 1.15)% of the SOC in the top 10 cm soil. NMR analysis indicated rich aromatic C (~30%) and carboxyl C (~40%) in GRSP, and abundant alkyl C (~30%) and O-alkyl C (~50%) in SOC. The recalcitrance indexes (RI), as defined as the ratio of sum of alkyl C and aromatic C over sum of O-alkyl C and carboxyl C, was (98.6 ± 18.9)%, (145.5 ± 10.9)% and (20.7 ± 0.3)% in GRSP higher than that in SOC in the PF, MF and BF, respectively. This study demonstrated that the stubborn structure of GRSP probably regulate the resistance of SOC sequestration in tropical forests, especially in the planted and secondary forests.
format	article
author	Jing Zhang Xuli Tang Siyuan Zhong Guangcai Yin Yifei Gao Xinhua He
author_facet	Jing Zhang Xuli Tang Siyuan Zhong Guangcai Yin Yifei Gao Xinhua He
author_sort	Jing Zhang
title	Recalcitrant carbon components in glomalin-related soil protein facilitate soil organic carbon preservation in tropical forests
title_short	Recalcitrant carbon components in glomalin-related soil protein facilitate soil organic carbon preservation in tropical forests
title_full	Recalcitrant carbon components in glomalin-related soil protein facilitate soil organic carbon preservation in tropical forests
title_fullStr	Recalcitrant carbon components in glomalin-related soil protein facilitate soil organic carbon preservation in tropical forests
title_full_unstemmed	Recalcitrant carbon components in glomalin-related soil protein facilitate soil organic carbon preservation in tropical forests
title_sort	recalcitrant carbon components in glomalin-related soil protein facilitate soil organic carbon preservation in tropical forests
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/dcf766edc3714f3fa7b61119d0998ce6
work_keys_str_mv	AT jingzhang recalcitrantcarboncomponentsinglomalinrelatedsoilproteinfacilitatesoilorganiccarbonpreservationintropicalforests AT xulitang recalcitrantcarboncomponentsinglomalinrelatedsoilproteinfacilitatesoilorganiccarbonpreservationintropicalforests AT siyuanzhong recalcitrantcarboncomponentsinglomalinrelatedsoilproteinfacilitatesoilorganiccarbonpreservationintropicalforests AT guangcaiyin recalcitrantcarboncomponentsinglomalinrelatedsoilproteinfacilitatesoilorganiccarbonpreservationintropicalforests AT yifeigao recalcitrantcarboncomponentsinglomalinrelatedsoilproteinfacilitatesoilorganiccarbonpreservationintropicalforests AT xinhuahe recalcitrantcarboncomponentsinglomalinrelatedsoilproteinfacilitatesoilorganiccarbonpreservationintropicalforests
_version_	1718385179159953408

Recalcitrant carbon components in glomalin-related soil protein facilitate soil organic carbon preservation in tropical forests

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