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Response of common bean (Phaseolus vulgaris L.) growth to soil contaminated with microplastics

The Science of The Total Environment 2020 341 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.

Fanrong Meng, Fanrong Meng, Violette Geissen, Violette Geissen, Xiaomei Yang, Fanrong Meng, Xiaomei Yang, Xiaomei Yang, Xiaomei Yang, Xiaomei Yang, Fanrong Meng, Fanrong Meng, Fanrong Meng, Fanrong Meng, Fanrong Meng, Xiaomei Yang, Xiaomei Yang, Xiaomei Yang, Xiaomei Yang, Xiaomei Yang, Xiaomei Yang, Xiaomei Yang, Xiaomei Yang, Xiaomei Yang, Xiaomei Yang, Xiaomei Yang, Xiaomei Yang, Xiaomei Yang, Xiaomei Yang, Michel Riksen, Xiaomei Yang, Xiaomei Yang, Michel Riksen, Xiaomei Yang, Michel Riksen, Xiaomei Yang, Xiaomei Yang, Xiaomei Yang, Xiaomei Yang, Violette Geissen, Xiaomei Yang, Minggang Xu, Xiaomei Yang, Xiaomei Yang, Violette Geissen, Violette Geissen, Violette Geissen, Xiaomei Yang, Violette Geissen, Xiaomei Yang, Violette Geissen, Violette Geissen, Violette Geissen, Violette Geissen, Violette Geissen, Violette Geissen, Violette Geissen, Violette Geissen, Violette Geissen, Violette Geissen, Violette Geissen, Violette Geissen, Violette Geissen, Violette Geissen, Violette Geissen, Violette Geissen, Minggang Xu Michel Riksen, Michel Riksen, Michel Riksen, Violette Geissen, Violette Geissen, Violette Geissen, Violette Geissen, Violette Geissen, Violette Geissen, Violette Geissen, Xiaomei Yang, Violette Geissen, Violette Geissen, Violette Geissen, Fanrong Meng, Violette Geissen, Violette Geissen, Violette Geissen, Violette Geissen, Xiaomei Yang, Minggang Xu Minggang Xu Violette Geissen, Minggang Xu, Violette Geissen, Violette Geissen, Violette Geissen, Violette Geissen, Violette Geissen, Xiaomei Yang, Violette Geissen, Violette Geissen, Violette Geissen, Xiaomei Yang, Xiaomei Yang, Xiaomei Yang, Violette Geissen, Violette Geissen, Violette Geissen, Violette Geissen, Violette Geissen, Violette Geissen, Xiaomei Yang, Xiaomei Yang, Violette Geissen, Xiaomei Yang, Violette Geissen, Violette Geissen, Violette Geissen, Violette Geissen, Violette Geissen, Violette Geissen, Violette Geissen, Violette Geissen, Violette Geissen, Xiaomei Yang, Violette Geissen, Violette Geissen, Xiaomei Yang, Violette Geissen, Violette Geissen, Violette Geissen, Violette Geissen, Violette Geissen, Violette Geissen, Xiaomei Yang, Xiaomei Yang, Xiaomei Yang, Xiaomei Yang, Violette Geissen, Violette Geissen, Violette Geissen, Violette Geissen, Violette Geissen, Violette Geissen, Xiaomei Yang, Michel Riksen, Violette Geissen, Violette Geissen, Violette Geissen, Violette Geissen, Violette Geissen, Violette Geissen, Violette Geissen, Violette Geissen, Minggang Xu

Summary

A pot experiment adding LDPE and biodegradable (PLA/PBAT) microplastics to soil at 0.5–2.5% by weight found no significant effects on common bean shoot or root biomass, though higher LDPE concentrations increased specific root nodules, suggesting subtle effects on nitrogen-fixing symbiosis.

Polymers

LDPE PE PLA

Although concerns surrounding microplastics (MPs) in terrestrial ecosystems have been growing in recent years, little is known about the responses of plant growth to MPs pollution. Here, we conducted a pot experiment in a net house under natural condition by adding two types of MPs, low-density polyethylene (LDPE-MPs) and polylactic acid (PLA) mixed with poly-butylene-adipate-co-terephthalate (PBAT, Bio-MPs), to sandy soil at 5 doses (0.5%, 1.0%, 1.5%, 2.0%, 2.5% ω/ω dry soil weight). The effects of LDPE-MPs and Bio-MPs on common bean (Phaseolus vulgaris L) were tested. Compared to control (no MPs addition), LDPE-MPs showed no significant effects on shoot, root and fruit biomass while ≥1.0% LDPE-MPs showed significant higher specific root nodules (n·g<sup>-1</sup> dry root biomass) and only 2.5% LDPE-MPs showed significant higher specific root length (cm·g<sup>-1</sup> dry root biomass). 1.0% LDPE-MPs caused significant higher leaf area and 0.5% LDPE-MPs caused significant lower leaf relative chlorophyll content. For Bio-MPs treatment, compared to control, ≥1.5% Bio-MPs showed significant lower shoot and root biomass. ≥2.0% Bio-MPs showed significant lower leaf area and fruit biomass. All Bio-MPs treatments showed significant higher specific root length and specific root nodules as compared to control. The results of the current research show that both MPs induced the responses of common bean growth, and ≥1.5% Bio-MPs exerted stronger effects. Further studies of their ecological impacts on soil-plant systems are urgently needed.

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