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Response of peanut plant and soil N-fixing bacterial communities to conventional and biodegradable microplastics

Journal of Hazardous Materials 2023 99 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 55 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Quanlong Wang, Quanlong Wang, Quanlong Wang, Fayuan Wang, Fayuan Wang, Fayuan Wang, Fayuan Wang, Fayuan Wang, Fayuan Wang, Fayuan Wang, Fayuan Wang, Shuwu Zhang, Shuwu Zhang, Xueying Feng, Shuwu Zhang, Yuhuan Sun, Quanlong Wang, Quanlong Wang, Quanlong Wang, Yingying Liu, Yuhuan Sun, Quanlong Wang, Xueying Feng, Xueying Feng, Xueying Feng, Xueying Feng, Fayuan Wang, Fayuan Wang, Fayuan Wang, Fayuan Wang, Fayuan Wang, Fayuan Wang, Wenzhi Cui, Quanlong Wang, Quanlong Wang, Quanlong Wang, Wenzhi Cui, Quanlong Wang, Quanlong Wang, Fayuan Wang, Shuwu Zhang, Fayuan Wang, Fayuan Wang, Yuhuan Sun, Yuhuan Sun, Yingying Liu, Yingying Liu, Yingying Liu, Fayuan Wang, Fayuan Wang, Fayuan Wang, Shuwu Zhang, Fayuan Wang, Fayuan Wang, Yuhuan Sun, Yuhuan Sun, Baoshan Xing Yuhuan Sun, Yuhuan Sun, Wenguang Li, Shuwu Zhang, Baoshan Xing Shuwu Zhang, Fayuan Wang, Shuwu Zhang, Fayuan Wang, Fayuan Wang, Fayuan Wang, Yuhuan Sun, Yuhuan Sun, Fayuan Wang, Shuwu Zhang, Shuwu Zhang, Baoshan Xing Yuhuan Sun, Yuhuan Sun, Yuhuan Sun, Yuhuan Sun, Wenzhi Cui, Yuhuan Sun, Yuhuan Sun, Yuhuan Sun, Yuhuan Sun, Shuwu Zhang, Wenzhi Cui, Wenguang Li, Wenzhi Cui, Fayuan Wang, Fayuan Wang, Fayuan Wang, Fayuan Wang, Baoshan Xing Baoshan Xing Fayuan Wang, Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Xueying Feng, Shuwu Zhang, Shuwu Zhang, Shuwu Zhang, Shuwu Zhang, Shuwu Zhang, Shuwu Zhang, Yuhuan Sun, Yuhuan Sun, Yuhuan Sun, Yuhuan Sun, Yuhuan Sun, Yuhuan Sun, Wenzhi Cui, Yuhuan Sun, Yuhuan Sun, Yuhuan Sun, Yuhuan Sun, Yuhuan Sun, Yuhuan Sun, Shuwu Zhang, Fayuan Wang, Yuhuan Sun, Shuwu Zhang, Baoshan Xing Baoshan Xing Fayuan Wang, Fayuan Wang, Baoshan Xing Baoshan Xing Yuhuan Sun, Baoshan Xing Yuhuan Sun, Yuhuan Sun, Yuhuan Sun, Yuhuan Sun, Yuhuan Sun, Baoshan Xing Yuhuan Sun, Fayuan Wang, Baoshan Xing Yuhuan Sun, Fayuan Wang, Baoshan Xing Baoshan Xing Fayuan Wang, Shuwu Zhang, Baoshan Xing Baoshan Xing Fayuan Wang, Fayuan Wang, Yuhuan Sun, Yuhuan Sun, Yuhuan Sun, Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Fayuan Wang, Fayuan Wang, Fayuan Wang, Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Yuhuan Sun, Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Fayuan Wang, Yuhuan Sun, Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Fayuan Wang, Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Baoshan Xing Fayuan Wang, Baoshan Xing Baoshan Xing

Summary

Researchers tested how conventional plastics (polyethylene and polystyrene) and a biodegradable plastic (polylactic acid) affect peanut plant growth and nitrogen-fixing soil bacteria. They found that while none of the plastics reduced plant biomass, the biodegradable PLA at high doses dramatically altered soil nitrogen levels and bacterial community composition. The study suggests that biodegradable plastics may not be as harmless to agricultural soil ecosystems as commonly assumed.

Polymers

HDPE PE PLA PS

Microplastics (MPs) occur and distribute widely in agroecosystems, posing a potential threat to soil-plant systems. However, little is known about their effects on legumes and N-fixing microbes. Here, we explored the effects of high-density polyethylene (HDPE), polystyrene (PS), and polylactic acid (PLA) on the growth of peanuts and soil N-fixing bacterial communities. All MPs treatments showed no phytotoxic effects on plant biomass, and PS and PLA even increased plant height, especially at the high dose. All MPs changed soil NO-N and NH-N contents and the activities of urease and FDAse. Particularly, high-dose PLA decreased soil NO-N content by 97% and increased soil urease activity by 104%. In most cases, MPs negatively affected plant N content, and high-dose PLA had the most pronounced effects. All MPs especially PLA changed soil N-fixing bacterial community structure. Symbiotic N-fixer Rhizoboales were greatly enriched by high-dose PLA, accompanied by the emergence of root nodulation, which may represent an adaptive strategy for peanuts to overcome N deficiency caused by PLA MPs pollution. Our findings indicate that MPs can change peanut-N fixing bacteria systems in a type- and dose-dependent manner, and biodegradable MPs may have more profound consequences for N biogeochemical cycling than traditional MPs.

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