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Histological study of giant cells formed by the root-knot nematodeMeloidogyne artiellia as compared withM. hapla andM. javanica in cabbage, turnip and barley

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Abstract

Feeding sites induced by the root-knot nematodeMeloidogyne artiellia in turnip (Brassica rapa), cabbage (Brassica oleracea) and barley (Hordeum vulgare) were examined by light and electron transmission microscopy, and compared with those formed byM. javanica andM. hapla. The feeding cells ofM. artiellia in turnip and cabbage showed hypertrophy, hyperplasia and vacuolization, and became multinucleate giant cells. In contrast to the typical simple-shaped giant cells ofM. javanica andM. hapla, those ofM. artiellia had an amoeboid structure containing ‘protuberances’, which are distinct from previously reported ‘projects’ of giant cells induced byM. incognita in other plants. Protuberances expanding between vascular cells were observed in young and developed giant cells. Since no cell-wall fragments were found at the bases of the protuberances, either by light or electron microscopy, it is strongly indicated that these structures were caused by local expansion of the giant cells rather than by fusion with adjacent cells. The giant cells ofM. artiellia in barley had regular shapes of giant cells without protuberances, and resembled those induced byM. javanica orM. hapla in turnip and cabbage.

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Correspondence to Yuji Oka.

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http://www.phytoparasitica.org posting Sept. 17, 2006.

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Mor (Mordechai), M., Oka, Y. Histological study of giant cells formed by the root-knot nematodeMeloidogyne artiellia as compared withM. hapla andM. javanica in cabbage, turnip and barley. Phytoparasitica 34, 502–509 (2006). https://doi.org/10.1007/BF02981206

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  • DOI: https://doi.org/10.1007/BF02981206

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