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Effects of microplastics on photosynthesized C allocation in a rice-soil system and its utilization by soil microbial groups

Journal of Hazardous Materials 2024 14 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 50 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Jianhong Ji, Mouliang Xiao, Fan Ding, Zhi’e Hu, Mouliang Xiao, Zhi’e Hu, Zhi’e Hu, Zhi’e Hu, Jianhong Ji, Yaoyao Tong, Mouliang Xiao, Jialing Wu, Qing Huang Jina Ding, Mouliang Xiao, Fan Ding, Mouliang Xiao, Fan Ding, Jina Ding, Fan Ding, Jialing Wu, Qing Huang Jialing Wu, Mouliang Xiao, Mouliang Xiao, Qing Huang Jialing Wu, Jialing Wu, Jialing Wu, Jialing Wu, Jialing Wu, Zhi’e Hu, Zhen-Ke Zhu, Mouliang Xiao, Yaoyao Tong, Jina Ding, Mouliang Xiao, Tida Ge, Yaoyao Tong, Mouliang Xiao, Zhen-Ke Zhu, Zhi’e Hu, Jianhong Ji, Jianping Chen, Tida Ge, Zhi’e Hu, Fan Ding, Jianhong Ji, Jianhong Ji, Tida Ge, Tida Ge, Tida Ge, Tida Ge, Zhi’e Hu, Jianhong Ji, Jina Ding, Tida Ge, Qing Huang Qing Huang Fan Ding, Fan Ding, Tida Ge, Fan Ding, Fan Ding, Jina Ding, Fan Ding, Fan Ding, Jina Ding, Tida Ge, Tida Ge, Tida Ge, Jina Ding, Tida Ge, Zhen-Ke Zhu, Tida Ge, Qing Huang Zhen-Ke Zhu, Zhen-Ke Zhu, Zhen-Ke Zhu, Mouliang Xiao, Tida Ge, Jianping Chen, Jianping Chen, Tida Ge, Jianping Chen, Tida Ge, Fan Ding, Tida Ge, Tida Ge, Tida Ge, Jina Ding, Qing Huang Fan Ding, Fan Ding, Qing Huang

Summary

Researchers used carbon isotope pulse labeling to track how microplastics affect the allocation of photosynthesized carbon in a rice paddy system. They found that microplastic amendments reduced photosynthetic carbon in roots by 30-54% while PVC microplastics increased soil organic carbon by up to 4.7 times compared to untreated soil. The study reveals that microplastics can significantly alter carbon cycling in paddy ecosystems by redirecting plant carbon inputs and changing how soil microbes utilize those carbon sources.

Polymers

PE PVC

The effect of microplastics (MPs) on the allocation of rice photosynthetic carbon (C) in paddy systems and its utilization by soil microorganisms remain unclear. In this study, C-CO pulse labeling was used to quantify the input and allocation of photosynthetic C in a rice-soil system under MPs amendment. Rice was pulse-labeled at tillering growth stage under 0.01% and 1% w/w polyethylene (PE) and polyvinyl chloride (PVC) MP amendments. Plants and soils were sampled 24 h after pulse labeling. Photosynthesized C in roots in MP treatments was 30-54% lower than that in no-MP treatments. The C in soil organic C (SOC) in PVC-MP-amended bulk soil was 4.3-4.7 times higher than that in no-MP treatments. PVC and high-dose PE increased the photosynthetic C in microbial biomass C in the rhizosphere soil. MPs altered the allocation of photosynthetic C to microbial phospholipid fatty acid (PLFA) groups. High-dose PVC increased the C gram-positive PLFAs. Low-dose PE and high-dose PVC enhanced C in fungal PLFAs in bulk soil (including arbuscular mycorrhizal fungi (AMF) and Zygomycota) by 175% and 197%, respectively. The results highlight that MPs alter plant C input and microbial utilization of rhizodeposits, thereby affecting the C cycle in paddy ecosystems.

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