• Contact Us
    • Send Feedback
    • Login
    View Item 
    •   Home
    • Journal and Journal Articles
    • Journal and Journal Articles
    • View Item
    •   Home
    • Journal and Journal Articles
    • Journal and Journal Articles
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    Whole Repository
    CollectionsIssue DateRegionCountryHubAffiliationAuthorsTitlesSubject
    This Sub-collection
    Issue DateRegionCountryHubAffiliationAuthorsTitlesSubject

    My Account

    Login

    Welcome to the International Institute of Tropical Agriculture Research Repository

    What would you like to view today?

    Symbiotic nitrogen fixation of two soybean genotypes as affected by rootknot nematodes and microsymbionts

    Thumbnail
    View/Open
    coyne-symbiotic-2007.pdf (407.3Kb)
    Date
    2007
    Author
    Coyne, D.L.
    Oyekanmi, E.
    Type
    Journal Article
    Metadata
    Show full item record
    Abstract/Description
    The ability of soybean to symbiotically fix Nitrogen (N) was found to be substantially reduced (p≤0.05), after inoculation with root-knot nematode (Meloidogyne incognita). Galling, which is a commonly used indicator of root-knot crop damage, may provide less accurate information about reductions in the symbiotic N fixation of soybean. The experiments were undertaken in Nigeria in pots, using two soybean genotypes (TGx 1448-2E and TGx 1485-1D) with differential susceptibility to nematode. The microsymbionts Glomus mosseae (200 spores), Bradyrhizobium japonicum (106 cells mL1) and Trichoderma pseudokoningii (6.8x107 spores) were applied plant1. Treatments involving nematode inoculation had 1000 second-stage juveniles plant1. Ureide N (fixed N) in stems and petioles, nodulation score and activity, nematode infection and arbuscular mycorrhizal colonization were assessed at harvest using standard methods. Regression and correlation analyses demonstrated that root nematode densities assessed at harvest were highly correlated negatively (p≤0.001) with Symbiotic N Fixation (SNF) as measured from the ureide N. Results confirmed that inoculation of M. incognita reduced SNF, nodulation score, nodule activity and plant growth parameters. However, fixed N was not necessarily related to galling damage. Results indicated that nodulation score and galling may not be the most suitable parameters, by which levels of productivity or damage could be determined in the presence of Meloidogyne sp., but rather ureide N is a more accurate assessment of the effect of M. incognita on soybean.
    http://dx.doi.org/10.3923/jbs.2007.1221.1226
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/3128
    Digital Object Identifier (DOI)
    http://dx.doi.org/10.3923/jbs.2007.1221.1226
    IITA Subjects
    Plant Diseases; Pests Of Plants; Genetic Improvement; Soybean
    Agrovoc Terms
    Arbuscular Mycorrhiza; N Fixation; N Dependence; Plant-Parasitic Nematodes; Rhizobial Nodulation; Ureide N
    Regions
    Africa; West Africa
    Countries
    Nigeria
    Collections
    • Journal and Journal Articles4835
    copyright © 2019  IITASpace. All rights reserved.
    IITA | Open Access Repository