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/lp/brill/differential-responses-of-resistant-and-susceptible-groundnut-xFjkaQ0Iph
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- Publisher
- Brill
- Copyright
- Copyright © Koninklijke Brill NV, Leiden, The Netherlands
- ISSN
- 1388-5545
- eISSN
- 1568-5411
- DOI
- 10.1163/138855410X508723
- Publisher site
- See Article on Publisher Site
Abstract
AbstractDitylenchus africanus causes cellular breakdown in pod tissue of susceptiblegroundnut cultivars. The histopathology of this nematode on a resistantgenotype was studied using light microscopy and compared with thehistopathology of D. africanus on a susceptible genotype. Plants of breedingline PC254K1 and cv. Sellie were propagated in a glasshouse, inoculated withD. africanus at inoculum levels of 2000, 5000 and 7000 nematodes per plantand the pods were collected at 90, 120 and 150 days after planting. Incontrast to the susceptible genotype, only a small number of nematodes wereobserved in restricted areas of the pod tissue of the resistant genotype.Furthermore, the resistant genotype showed neither external symptoms norcellular breakdown in reaction to D. africanus. According to results of thisstudy, the mechanism of resistance involved may be the inhibition of properdevelopment, migration and reproduction of this nematode, thus preventing itbuilding up to damaging population levels.
Journal
Nematology – Brill
Published: Jan 1, 2011
Keywords: RESISTANCE; HOST RESPONSE; HISTOPATHOLOGY; MECHANISM OF RESISTANCE; ARACHIS HYPOGAEA; NEMATODE DAMAGE