A meta-analysis on crop growth and heavy metals accumulation with PGPB inoculation in contaminated soils.

Autor: Bai X; College of Soil and Water Conservation Science and Engineering, Northwest A&F University, 712100 Yangling, China., Bol R; Institute of Bio‑ and Geosciences, Agrosphere (IBG-3), Forschungszentrum Jülich, Wilhelm Johnen Str, 52425 Jülich, Germany., Chen H; College of Xingzhi, Zhejiang Normal University, Jinhua 321000, China., Cui Q; State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences, Ministry of Water Resources, 712100 Yangling, China., Qiu T; College of Natural Resources and Environment, Northwest A&F University, 712100 Yangling, China., Zhao S; State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences, Ministry of Water Resources, 712100 Yangling, China., Fang L; College of Soil and Water Conservation Science and Engineering, Northwest A&F University, 712100 Yangling, China; Key Laboratory of Green Utilization of Critical Non-metallic Mineral Resources, Ministry of Education, Wuhan University of Technology, 430070 Wuhan, China. Electronic address: flinc629@hotmail.com.
Jazyk: angličtina
Zdroj: Journal of hazardous materials [J Hazard Mater] 2024 Jun 05; Vol. 471, pp. 134370. Date of Electronic Publication: 2024 Apr 20.
DOI: 10.1016/j.jhazmat.2024.134370
Abstrakt: Plant growth-promoting bacteria (PGPB) offer a promising solution for mitigating heavy metals (HMs) stress in crops, yet the mechanisms underlying the way they operate in the soil-plant system are not fully understood. We therefore conducted a meta-analysis with 2037 observations to quantitatively evaluate the effects and determinants of PGPB inoculation on crop growth and HMs accumulation in contaminated soils. We found that inoculation increased shoot and root biomass of all five crops (rice, maize, wheat, soybean, and sorghum) and decreased metal accumulation in rice and wheat shoots together with wheat roots. Key factors driving inoculation efficiency included soil organic matter (SOM) and the addition of exogenous fertilizers (N, P, and K). The phylum Proteobacteria was identified as the keystone taxa in effectively alleviating HMs stress in crops. More antioxidant enzyme activity, photosynthetic pigment, and nutrient absorption were induced by it. Overall, using PGPB inoculation improved the growth performance of all five crops, significantly increasing crop biomass in shoots, roots, and grains by 33 %, 35 %, and 20 %, respectively, while concurrently significantly decreasing heavy metal accumulation by 16 %, 9 %, and 37 %, respectively. These results are vital to grasping the benefits of PGPB and its future application in enhancing crop resistance to HMs.
Competing Interests: Declaration of Competing Interest The authors declare no competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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