Histopathological changes induced by Meloidogyne incognita in some ornamental plants |
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| Institution: | 1. Laboratory for Food Crops, Institute of Tropical Agriculture, Universiti Putra Malaysia, Serdang 43400, Selangor Darul Ehsan, Malaysia;2. Centre of Excellence for Postharvest Biotechnology (CEPB), School of Biosciences, The University of Nottingham Malaysia Campus, Semenyih 43500, Selangor D. E., Malaysia;3. Biology Division, Malaysian Palm Oil Board, 6, Persiaran Institusi, Bandar Baru Bangi, Kajang 43000, Selangor D.E., Malaysia;1. State Key Laboratory for Biology of Plant Diseases and Insect Pests/Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, P.R.China;2. College of Plant Protection, Hunan Agricultural University, Changsha 410128, P.R.China;3. Agriculture Bureau of Hanshou County, Hunan Province, Changde 415900, P.R.China;1. Dept. of Ecology, Swedish University of Agricultural Sciences (SLU), PO Box 7044, 750 07 Uppsala, Sweden;2. Dept. of Forest Mycology and Plant Pathology, Swedish University of Agricultural Sciences (SLU), PO Box 7026, 750 07 Uppsala, Sweden;1. Agricultural Research Council - Tropical and Subtropical Crops, Private Bag X11208, Nelspruit 1200, South Africa;2. Unit for Environmental Sciences and Management, North-West University, Private Bag X 6001, Potchefstroom 2520, South Africa;1. Department of Plant Protection, Faculty of Agriculture, Zagazig University, 44511 Zagazig, Egypt;2. Department of Agricultural Microbiology, Faculty of Agriculture, Zagazig University, 44511 Zagazig, Egypt;3. Plant Production Department, Arid Lands Cultivation Research Institute, The City of Scientific Research and Technological Applications, SRTA-City. Borg El Arab, Alexandria, Egypt;4. Department of Biotechnology, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia;5. Biochemistry Department, Faculty of Agriculture, Zagazig University, Zagazig 44511, Egypt;1. Department of Plant Pathology, Pir Mehr Ali Shah Arid Agriculture University, Rawalpindi, Pakistan;2. Department of Entomology, Pir Mehr Ali Shah Arid Agriculture University, Rawalpindi, Pakistan |
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| Abstract: | Histopathological changes induced by the root-knot nematode (Meloidogyne incognita) in five ornamental plants, specifically, Calendula (Calendula officinalis), Centaurea (Centaurea montana), Papaver (Papaver somniferum), Chrysanthemum (Chrysanthemum morifolium) and Dianthus (Dianthus caryophyllus), were investigated. Based on the galling index (GI), Centaurea was classified as susceptible, Calendula as moderately susceptible, and Papaver as moderately resistant, while Chrysanthemum and Dianthus were highly resistant to M. incognita infection. The histopathology of the galled roots of Centaurea, Calendula, and Papaver during later stages of infection showed that nematodes were localized entirely within the cortex and generally oriented horizontally to the vascular cylinder. Most of the females were mature, and a few of them were associated with egg masses. Giant cells with a variation in cell sizes were observed in the galled roots of all three of the plant species and exhibited a granular cytoplasm and hypertrophied nuclei as a typical reaction to nematode feeding. |
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| Keywords: | Histopathology Gall index Giant cell Nematode |
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