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| Effects of mycorrhizal inoculation on tomato growth andarsenic absorption under arsenic (As) contamination |
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| Abstract: |
| Tomato plants growing in soils with different concentrations of arsenic were inoculated with mycorrhizal
fungi to study the effects of mycorrhizal fungi on tomato plant growth and the arsenic absorption under arsenic (As)
contamination conditions. The results showed that the total root length and specific root length ratio decreased with the
increase of soil arsenic concentration，and soil arsenic contamination significantly increased the arsenic concentration
of whole tomato plants（including aboveground parts and roots）. When the soil arsenic concentration increased from
0 mg/kg to 100 mg/kg，the root shoot ratio of tomato plant increased during the seedling stage，and the fruit ratio and
fruit quality dropped in the fruiting stage; however，mycorrhizal fungi inoculation during the anthesis stage and fruiting
stage，could significantly decrease the root shoot ratio，and promote the quantity and quality of fruits. Mycorrhizal fungi
inoculation reduced fruit arsenic absorption and content of tomato plants growing in the arsenic contaminated soil. When
the soil arsenic concentration attained to 200 mg/kg，the root shoot ratio of un-inoculated plants increased evidently
during the anthesis stage and fruiting stage; neither the inoculated nor un-inoculated plants would fruit. |
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