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Plant origin and maternal warming mediate seed germination responses of Solidago canadensis to microplastic stress
Summary
Scientists studied how microplastic pollution in soil affects the germination of Canadian goldenrod (an aggressive invasive weed), finding that seeds from different regions and seeds exposed to prior warming responded differently to plastic contamination. This matters because it suggests that as microplastics build up in soil and climate warming continues, some invasive plants could actually become better at spreading, a reminder that plastic waste doesn't just pollute the environment, it can reshape entire ecosystems in ways that may indirectly affect food systems and land we rely on.
Experimental sources: The experimental subjects were Canadian goldenrod seeds from North America (SNA-A), Canadian goldenrod seeds from North America subjected to warming treatment (SNA-W), Canadian goldenrod seeds from China (SCN-A), and Canadian goldenrod seeds from China subjected to warming treatment (SCN-W). Microplastic concentration: Five mass fraction gradients were set at 0%, 1%, 2%, 4%, and 6%. Experimental period: From April 2025 to May 2025. The seed germination indicators mainly measured the bud length(mm), 7-day germination percentage(%),final germination rate(%), germination index, vigor index,first day of germination(d), Timson index and mean germination time（d）. Thousand-seed weight: In this experiment, the thousand-seed weight was determined by the hundred-seed weight method. One hundred seeds were randomly selected and weighed using a precision electronic balance with an accuracy of 0.0001g, and this process was repeated five times.