Details
| Original language | English |
|---|---|
| Pages (from-to) | 246-256 |
| Number of pages | 11 |
| Journal | Land Degradation and Development |
| Volume | 33 |
| Issue number | 2 |
| Early online date | 18 Jan 2022 |
| Publication status | Published - 30 Jan 2022 |
Abstract
The available carbon (C) to phosphorus (P) ratio in the soil is regulated by extracellular hydrolases for C and P acquisition by microbes and plants. However, the stoichiometric relationship between acquiring C and P in paddy rhizosphere and bulk soils remains unclear. The objective was to explore the underlying mechanisms of C and P acquisition stoichiometry in rhizosphere and bulk soils in response to P fertilization and cellulose addition. Amendment with either cellulose or P separately caused a significant increase in the maximal velocity (Vmax) of C acquisition enzymes (β-1,4-glucosidase and β-cellobiohydrolase) but decreased that of P acquisition enzymes (acid and alkaline phosphomonoesterases) in bulk soil. In contrast, lower Vmax values of C and P acquisition enzymes were observed in rhizosphere soil than in bulk soil. The co-application of cellulose and P increased the Vmax of P acquisition enzymes in rhizosphere soil but decreased that of only alkaline phosphomonoesterase in bulk soil. Results show that P availability and labile-C content co-regulated the P/C acquisition ratio, and two inverse linear relationships were observed. Specifically, the P/C acquisition ratio was negatively related to both the dissolved organic C/Olsen-P ratio and the microbial biomass C/P ratio in rhizosphere soil. However, the P/C acquisition ratio was positively related to both the dissolved organic C/Olsen-P ratio and the microbial biomass C/P ratio in bulk soil. Overall, microbes mineralized less organic P to acquire P in paddy soil rhizosphere (i.e., containing higher labile-C) than in bulk soil (i.e., having lower labile-C contents).
ASJC Scopus subject areas
- Environmental Science(all)
- Environmental Chemistry
- Social Sciences(all)
- Development
- Environmental Science(all)
- Agricultural and Biological Sciences(all)
- Soil Science
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In: Land Degradation and Development, Vol. 33, No. 2, 30.01.2022, p. 246-256.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Stoichiometric theory shapes enzyme kinetics in paddy bulk soil but not in rhizosphere soil
AU - Liu, Yuhuai
AU - Shahbaz, Muhammad
AU - Fang, Yunying
AU - Li, Baozhen
AU - Wei, Xiaomeng
AU - Zhu, Zhenke
AU - Lynn, Tin Mar
AU - Lu, Shunbao
AU - Shibistova, Olga
AU - Wu, Jinshui
AU - Guggenberger, Georg
AU - Ge, Tida
N1 - Funding information: Alexander von Humboldt Foundation of Germany; National Natural Science Foundation of China, Grant/Award Numbers: 41950410565, 41977093; Natural Science Foundation of Hunan Province, Grant/Award Numbers: 2019JJ30028, 2019JJ10003, 2020JJ4653; Recruitment Program for Innovative Talents of Jiangxi Province, Grant/Award Number: jxsq2018102070; State Scholarship Fund of China Scholarship Council
PY - 2022/1/30
Y1 - 2022/1/30
N2 - The available carbon (C) to phosphorus (P) ratio in the soil is regulated by extracellular hydrolases for C and P acquisition by microbes and plants. However, the stoichiometric relationship between acquiring C and P in paddy rhizosphere and bulk soils remains unclear. The objective was to explore the underlying mechanisms of C and P acquisition stoichiometry in rhizosphere and bulk soils in response to P fertilization and cellulose addition. Amendment with either cellulose or P separately caused a significant increase in the maximal velocity (Vmax) of C acquisition enzymes (β-1,4-glucosidase and β-cellobiohydrolase) but decreased that of P acquisition enzymes (acid and alkaline phosphomonoesterases) in bulk soil. In contrast, lower Vmax values of C and P acquisition enzymes were observed in rhizosphere soil than in bulk soil. The co-application of cellulose and P increased the Vmax of P acquisition enzymes in rhizosphere soil but decreased that of only alkaline phosphomonoesterase in bulk soil. Results show that P availability and labile-C content co-regulated the P/C acquisition ratio, and two inverse linear relationships were observed. Specifically, the P/C acquisition ratio was negatively related to both the dissolved organic C/Olsen-P ratio and the microbial biomass C/P ratio in rhizosphere soil. However, the P/C acquisition ratio was positively related to both the dissolved organic C/Olsen-P ratio and the microbial biomass C/P ratio in bulk soil. Overall, microbes mineralized less organic P to acquire P in paddy soil rhizosphere (i.e., containing higher labile-C) than in bulk soil (i.e., having lower labile-C contents).
AB - The available carbon (C) to phosphorus (P) ratio in the soil is regulated by extracellular hydrolases for C and P acquisition by microbes and plants. However, the stoichiometric relationship between acquiring C and P in paddy rhizosphere and bulk soils remains unclear. The objective was to explore the underlying mechanisms of C and P acquisition stoichiometry in rhizosphere and bulk soils in response to P fertilization and cellulose addition. Amendment with either cellulose or P separately caused a significant increase in the maximal velocity (Vmax) of C acquisition enzymes (β-1,4-glucosidase and β-cellobiohydrolase) but decreased that of P acquisition enzymes (acid and alkaline phosphomonoesterases) in bulk soil. In contrast, lower Vmax values of C and P acquisition enzymes were observed in rhizosphere soil than in bulk soil. The co-application of cellulose and P increased the Vmax of P acquisition enzymes in rhizosphere soil but decreased that of only alkaline phosphomonoesterase in bulk soil. Results show that P availability and labile-C content co-regulated the P/C acquisition ratio, and two inverse linear relationships were observed. Specifically, the P/C acquisition ratio was negatively related to both the dissolved organic C/Olsen-P ratio and the microbial biomass C/P ratio in rhizosphere soil. However, the P/C acquisition ratio was positively related to both the dissolved organic C/Olsen-P ratio and the microbial biomass C/P ratio in bulk soil. Overall, microbes mineralized less organic P to acquire P in paddy soil rhizosphere (i.e., containing higher labile-C) than in bulk soil (i.e., having lower labile-C contents).
UR - http://www.scopus.com/inward/record.url?scp=85118997692&partnerID=8YFLogxK
U2 - 10.1002/ldr.4141
DO - 10.1002/ldr.4141
M3 - Article
AN - SCOPUS:85118997692
VL - 33
SP - 246
EP - 256
JO - Land Degradation and Development
JF - Land Degradation and Development
SN - 1085-3278
IS - 2
ER -