Benomyl inhibits phosphorus transport but not fungal alkaline phosphatase activity in a Glomus–cucumber symbiosis

John Larsen, Ida Thingstrup, Iver Jakobsen, Søren Rosendahl

    49 Citations (Scopus)

    Abstract

    Short-term effects of benomyl on the arbuscular mycorrhizal fungus Glomus caledonium (Nicol. & Gerd.) Trappe and Gerdeman associated with Cucumis sativus L. were studied by measuring effects on fungal P transport and on fungal alkaline phosphatase activity. Mycorrhizal plants were grown in three compartment systems where nylon mesh was used to separate n root-free hyphal compartment (HC) and a root + hyphal compartment(RHC) from The main root compartment (RC). Non-mycorrhizal control plants were grown in similar growth units. After 6 wk benomyl was applied to the plants in three ways: as soil drenches to RHC or HC, or as u spray to the leaves. Benomyl was added in three concentrations. Equal amounts of 32P and 33P were added to the HC and to the RHC respectively, immediately after the application of benomyl. Plants were harvested 4–6 d later. Hyphal transport of 32P from the HC was inhibited when benomyl was applied to the HC at 10 µg g-1 soil, whereas the uptake of 32P from RHC I roots + hyphae) was reduced only at the highest dose of application to the RHC (100 µ g g-1 soil). In contrast to the marked reduction of benomyl on fungal P transport, the activity of fungal alkaline phosphatase inside the roots was unaffected by benomyl.
    Original languageEnglish
    JournalNew Phytologist
    Volume132
    Issue number1
    Pages (from-to)127-133
    ISSN0028-646X
    DOIs
    Publication statusPublished - 1996

    Fingerprint

    Dive into the research topics of 'Benomyl inhibits phosphorus transport but not fungal alkaline phosphatase activity in a Glomus–cucumber symbiosis'. Together they form a unique fingerprint.

    Cite this