Characterization of resistance to pratylenchus thornei (Nematoda) in wheat (Triticum aestivum): Attraction, penetration, motility, and reproduction

35Citations
Citations of this article
39Readers
Mendeley users who have this article in their library.

Abstract

Lines from a cross between two wheat (Triticum aestivum) cultivars with contrasting resistance phenotypes to Pratylenchus thornei (Nematoda) were investigated to determine the stage at which resistance occurs. Host resistance was examined at nematode attraction to and penetration of roots and nematode motility, maturation, and reproduction within roots. There was no significant difference in the rate at which P. thornei was attracted toward or penetrated resistant or susceptible roots. However, suppression of migration, juvenile maturation, and reproduction in and near resistant roots was evident, suggesting that resistance acts post penetration. No preferential root penetration zone was observed in contrast to other studies. The inhibitory compounds from resistant wheat plants appeared to be constitutively expressed and water soluble because nematode migration was suppressed in roots and root exudates of unchallenged seedlings. The effects of these compounds were reversible and affected P. thornei but not P. neglectus. Apart from migration, nematode multiplication was greatly inhibited by resistance because only a few juveniles (10%) developed past stage three in roots of resistant compared with susceptible plants. Earlier in the life cycle, egg deposition and hatch of P. thornei were also significantly reduced in resistant roots and root exudates, suggesting the presence of hatching inhibitors. © 2014 The American Phytopathological Society.

Author supplied keywords

Cite

CITATION STYLE

APA

Linsell, K. J., Riley, I. T., Davies, K. A., & Oldach, K. H. (2014). Characterization of resistance to pratylenchus thornei (Nematoda) in wheat (Triticum aestivum): Attraction, penetration, motility, and reproduction. Phytopathology, 104(2), 174–187. https://doi.org/10.1094/PHYTO-12-12-0345-R

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free