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Acifluorfen Tolerance in Lycopersicon

  • Jacqueline A. Ricotta (a1) and John B. Masiunas (a1)

Studies were conducted to determine the mechanism of acifluorfen tolerance within the Lycopersicon genus. Absorption of 14C-acifluorfen was not correlated with tolerance. There was a negative correlation (r = −0.57) between absorption 24 h after treatment and wax density. No other surface characteristic correlated with absorption. Less than 3% of absorbed 14C was translocated and there was no metabolism of acifluorfen. All genotypes were susceptible to paraquat, and acifluorfen-tolerant genotypes had lower levels of ascorbate than susceptible genotypes, implying that free radical protectant systems were not involved in tolerance. Genotypes varied in amounts of chlorophyll a, chlorophyll b, and total chlorophyll but the differences did not correlate to acifluorfen tolerance.

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Weed Science
  • ISSN: 0043-1745
  • EISSN: 1550-2759
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