Journal of Nematology (2005) 37, 370-371

X. Gao, J.L. Starr and M. Kolomiets (2005)
Role of a maize lipoxygenase in the interaction of maize and Meloidogyne incognita
Journal of Nematology 37 (3), 370-371
44th Annual Meeting, Society of Nematologists, Fort Lauderdale, Florida, 9-13 July, 2005
Abstract: LOX genes encode for lipoxygenases that oxidize polyunsaturated fatty acids to produce an array of structurally and functionally diverse oxylipins. There are two general classes of LOX isoforms, 13- or 9-LOXs, based on the particular carbon atom that is oxidized by a particular isoform. Products of some 13-LOXs (i.e., jasmonates and C6 volatiles) function in plant defenses against pests and pathogens. The function of 9-LOX is not well understood. Here we report for the first time on the involvement of a 9-LOX gene in resistance to root-knot nematode. Northern blots and semi-quantitative RT-PCR analysis of the 9-LOX gene, ZmLOX3, from maize revealed that its transcripts increased steadily in roots inoculated with Meloidogyne incognita, with a peak in concentration at 7 to 10 days after inoculation. To further investigate the potential role of oxylipins and ZmLOX3 in the interaction of maize and M. incognita, a knockout mutant has been generated and its response to nematodes characterized.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)

Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Meloidogyne incognita	Maize/corn (Zea mays)