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Tier 2
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Original research — experimental, observational, or case-control study. Direct primary evidence.
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Morphological Rather Than Abundance Factors Control Microplastic Accumulation in Wheat Grains: A Field-Based Study
Journal of Agricultural and Food Chemistry
2026
Summary
Researchers conducted a field study on wheat crops and found that microplastic shape, rather than particle abundance, drives uptake into grain, with spherical particles translocating more readily while fibrous polystyrene particles appeared to impede absorption — the first identification of morphology as a key mechanistic factor in plant MP uptake.
< 0.05); fibrous PS likely hindered absorption. This study is the first to identify MP shape as a key factor in plant uptake, offering new mechanistic insights.