TY - JOUR
T1 - Dynamics of root–microbe interactions governing crop phosphorus acquisition after straw amendment
AU - Li, Hongliang
AU - Zhu, Haitao
AU - Li, Hongbo
AU - Zhang, Yuqiang
AU - Xu, Sixin
AU - Cai, Shumei
AU - Sulaiman, Alharbi Almwarai
AU - Kuzyakov, Yakov
AU - Rengel, Zed
AU - Zhang, Deshan
N1 - Funding Information:
This work was supported by the National Natural Science Foundation of China ( 31801946 ), National Key Research and Development Program of China ( 2017YFD0200200 ), Government Program of Competitive Growth of Kazan Federal University , and RUDN University Strategic Academic Leadership Program .
Publisher Copyright:
© 2023 Elsevier Ltd
PY - 2023/6
Y1 - 2023/6
N2 - Phosphorus (P) mobilization by microorganisms influences root morphological and exudation traits related to crop nutrient acquisition. However, the dynamics of root P acquisition strategies in response to P immobilization followed by release that accompany microbial growth and decay remain unclear. We evaluated root–microbe interactions governing P uptake by Brassica chinensis and Solanum lycopersicum grown for 56 days in low-P (10 mg P kg−1) and high-P (100 mg P kg−1) soil with or without straw addition. Straw addition increased the growth of bacteria and fungi (including microorganisms harbouring the phoD, phoC and pqqC genes) and enhanced the microbial P pool. The high microbial abundance 29 days after straw addition was associated with short roots and weak carboxylate exudation in B. chinensis and S. lycopersicum regardless of P fertilization. Phosphate-solubilizing microbes harbouring the phoD, phoC and pqqC genes together with microbial P release increased plant-available soil P, influencing variation in root P-acquisition strategies between the species. The high level of CaCl2-extractable P due to P release upon microbial decay and phosphate-solubilizing microorganisms was associated with short roots and weak carboxylate exudation in B. chinensis, but underpinned crop nutrient acquisition in low-P soil amended with straw after day 40. S. lycopersicum increased root elongation in response to mobilization of microbial P after day 44. The long roots coupled with the increased P availability due to microbial P release elicited large P acquisition by S. lycopersicum in straw-amended, low-P soil. By contrast, microbial abundance and microbially mediated P availability had little influence on root P-acquisition strategies in B. chinensis and S. lycopersicum in high-P, straw-amended soil. This study highlighted the importance of temporally varying root–microbe interactions in influencing crop P acquisition in low-P, straw-amended soil.
AB - Phosphorus (P) mobilization by microorganisms influences root morphological and exudation traits related to crop nutrient acquisition. However, the dynamics of root P acquisition strategies in response to P immobilization followed by release that accompany microbial growth and decay remain unclear. We evaluated root–microbe interactions governing P uptake by Brassica chinensis and Solanum lycopersicum grown for 56 days in low-P (10 mg P kg−1) and high-P (100 mg P kg−1) soil with or without straw addition. Straw addition increased the growth of bacteria and fungi (including microorganisms harbouring the phoD, phoC and pqqC genes) and enhanced the microbial P pool. The high microbial abundance 29 days after straw addition was associated with short roots and weak carboxylate exudation in B. chinensis and S. lycopersicum regardless of P fertilization. Phosphate-solubilizing microbes harbouring the phoD, phoC and pqqC genes together with microbial P release increased plant-available soil P, influencing variation in root P-acquisition strategies between the species. The high level of CaCl2-extractable P due to P release upon microbial decay and phosphate-solubilizing microorganisms was associated with short roots and weak carboxylate exudation in B. chinensis, but underpinned crop nutrient acquisition in low-P soil amended with straw after day 40. S. lycopersicum increased root elongation in response to mobilization of microbial P after day 44. The long roots coupled with the increased P availability due to microbial P release elicited large P acquisition by S. lycopersicum in straw-amended, low-P soil. By contrast, microbial abundance and microbially mediated P availability had little influence on root P-acquisition strategies in B. chinensis and S. lycopersicum in high-P, straw-amended soil. This study highlighted the importance of temporally varying root–microbe interactions in influencing crop P acquisition in low-P, straw-amended soil.
KW - Crop P-use efficiency
KW - Microbial biomass turnover
KW - Nutrient fertilization and straw return
KW - Phosphate-solubilizing microorganisms
KW - Root exudation
KW - Root morphological traits
UR - http://www.scopus.com/inward/record.url?scp=85153963542&partnerID=8YFLogxK
U2 - 10.1016/j.soilbio.2023.109039
DO - 10.1016/j.soilbio.2023.109039
M3 - Article
AN - SCOPUS:85153963542
SN - 0038-0717
VL - 181
JO - Soil Biology and Biochemistry
JF - Soil Biology and Biochemistry
M1 - 109039
ER -