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Title: Specific association of plant pathogens with submersed aquatic plants
Authors: University of Massachusetts at Amherst.
Aquatic Plant Control Research Program (U.S.)
Theriot, Edwin A.
Kees, Stewart Lamar, 1958-1997.
Gunner, Haim B., 1924-
Keywords: Plant lectins
Plant pathogens
Submersed aquatic plants
Eurasian watermilfoil
Issue Date: Sep-1996
Publisher: Environmental Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Description: Technical Report
Abstract: The submersed aquatic plants Myriophyllum spicatum L. (Eurasian watermilfoil) and Hydrilla verticillata (L. fil.) Royle (hydrilla) are a nuisance in waterways of the United States. Biological control with plant pathogens is a proven method for the management of aquatic plants. This study describes the identification, isolation, and characterization of lectins of Eurasian watermilfoil and hydrilla as a potential mechanism for specific attachment of fungal plant pathogens to the target plants. Lectins specific for α-L-fucose were isolated from both Eurasian watermilfoil and hydrilla. The watermilfoil lectin is a Type I lectin having a monomeric subunit molecular weight of 48 kilodaltons (kda) and exists in both dimeric and tetrameric form. The hydrilla lectin is a Type II lectin composed of two monomeric subunits having molecular weights of 67 and 50 kda, which persist as a dimer and a tetramer, respectively. Two fungal pathogens of Eurasian watermilfoil and two fungal pathogens of hydrilla were evaluated for their ability to attach and infect the target species and for their capacity to be agglutinated by physiological concentrations of purified lectin from each plant species. Findings of this study support the theory that microbial recognition by plant lectins is a mediator of host defense. This study also reports 16 new potential pathogens against hydrilla and 15 against Eurasian watermilfoil.
Appears in Collections:Technical Report

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