PEROXIDASE ISOZYMES FROM MELOIDOGYNE SPP AND THEIR ORIGIN

  • 1 January 1979
    • journal article
    • research article
    • Vol. 11  (1) , 1-5
Abstract
Two peroxidase isozymes (Ef [relative electrophoretic mobility] 0.43 and 0.53) were detected by electrophoretic analysis in homogenates of M. arenaria, M. hapla, M. javanica and M. incognita females reared on tomato [Lycopersicon esculentum]. No peroxidase isozymes were detected electrophoretically in homogenates of adult males, preparasitic larvae, or eggs. Peroxidase isozymes from females reared on bean, eggplant or tobacco differed from those from females reared on tomato. Bean and eggplant populations had a single peroxidase isozyme each, respectively, Ef 0.21 and 0.28. No peroxidase isozymes were detected in tobacco populations under the conditions used, although total activity assays revealed low levels of peroxidase activity in homogenates of tobacco populations. The peroxidase isozymes detected in females reared on tomato or bean appear similar to the peroxidase isozymes present in root-knot galls, adjacent ungalled roots and roots from uninoculated plants of the corresponding hosts. The probability is discussed that most of the peroxidase activity associated with Meloidogyne spp. females is of host origin.