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Effects of Mi-mediated resistance and nematode inoculation on root weight (±S.D.) of tomato plants. Plants were inoculated with 20,000 (A) and 200,000 (B) nematode eggs, while control plants were mock-inoculated with water. Nematode infection did not alter root biomass at the lower inoculum level (A), whereas the higher inoculum level caused an increase in the root biomass of resistant (Mi-1.2-) plants.
