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The Influence of Morphactin On the Root-Knot Nematode, Meloidogyne Javanica, and Its Galls 1)

The Influence of Morphactin On the Root-Knot Nematode, Meloidogyne Javanica, and Its Galls 1) THE INFLUENCE OF MORPHACTIN ON THE ROOT-KNOT NEMATODE, MELOIDOGYNE JAVANICA, AND ITS GALLS 1) BY D. ORION and G. MINZ Division of Nematology, The Volcani Institute of Agricultural Research, Bet Dagan, Israel The effect of methyl-2-chloro-9-hydroxyfluorene-(9)-carboxylate (morphactin), a plant antimitotic agent, was studied on tomato seedlings infected with Meloidogyne javazzica. Morphactin suppressed giant cell formation and consequently reduced the rate of nematode development. Sex reversal occurred, and the percentage of males in the population increased up to 60%. The activity of morphactin was most conspicuous during the early stages of gall formation. Gall parenchymal tissue differentiated to vascular cells, resulting in abnormal distorted female adults, and the host plant exhibited distorted apices, retarded growth and strong epinasty. The substance did not signi- ficantly suppress the population of the saprozoic nematode, Panagrellus redivivus. The association of giant cell formation with the normal development and repro- duction of the root-knot nematode, Meloidogyne spp., has been described by many workers. Crittenden (1958) showed that in susceptible varieties of soybean infested by M, incognita acrita, numerous large giant cells with many enlarged nuclei were formed, while in resistant varieties there were only few, relatively small, giant cells and each contained only few http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Nematologica Brill

The Influence of Morphactin On the Root-Knot Nematode, Meloidogyne Javanica, and Its Galls 1)

Orion, D.; Minz, G.
Nematologica , Volume 17 (1): 6 – Jan 1, 1971
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Publisher
Brill
Copyright
Copyright © Koninklijke Brill NV, Leiden, The Netherlands
ISSN
0028-2596
eISSN
1875-2926
DOI
10.1163/187529271X00468
Publisher site
See Article on Publisher Site

Abstract

THE INFLUENCE OF MORPHACTIN ON THE ROOT-KNOT NEMATODE, MELOIDOGYNE JAVANICA, AND ITS GALLS 1) BY D. ORION and G. MINZ Division of Nematology, The Volcani Institute of Agricultural Research, Bet Dagan, Israel The effect of methyl-2-chloro-9-hydroxyfluorene-(9)-carboxylate (morphactin), a plant antimitotic agent, was studied on tomato seedlings infected with Meloidogyne javazzica. Morphactin suppressed giant cell formation and consequently reduced the rate of nematode development. Sex reversal occurred, and the percentage of males in the population increased up to 60%. The activity of morphactin was most conspicuous during the early stages of gall formation. Gall parenchymal tissue differentiated to vascular cells, resulting in abnormal distorted female adults, and the host plant exhibited distorted apices, retarded growth and strong epinasty. The substance did not signi- ficantly suppress the population of the saprozoic nematode, Panagrellus redivivus. The association of giant cell formation with the normal development and repro- duction of the root-knot nematode, Meloidogyne spp., has been described by many workers. Crittenden (1958) showed that in susceptible varieties of soybean infested by M, incognita acrita, numerous large giant cells with many enlarged nuclei were formed, while in resistant varieties there were only few, relatively small, giant cells and each contained only few

Journal

Nematologica – Brill

Published: Jan 1, 1971

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