Influence of Formononetin and NaCl on Mycorrhizal Colonization and Fusarium Crown and Root Rot of Asparagus

Plant Disease
Wade H Elmer

Abstract

Replanted asparagus fields commonly fail to produce a profitable stand due to alleopathic residues left behind from the previous asparagus crop, elevated densities of pathogenic Fusarium spp., and low densities of vesicular arbuscular mycorrhizae (VAM). Formononetin, a plant isoflavone that stimulates VAM spores to germinate, and sodium chloride (NaCl), a disease-suppressing amendment, were evaluated alone and in combination for their effect on reestablishing asparagus at two locations in abandoned asparagus fields. Greenhouse studies also were conducted with naturally and artificially infested soils. Formononetin was applied as a crown soak or soil drench, and NaCl was applied as a granular treatment. Feeder roots from soil cores sampled from field plots and from greenhouse transplants were assayed for colonization by VAM and for lesions caused by Fusarium oxysporum and F. proliferatum. Formononetin increased the number of VAM vesicles in roots from the field and greenhouse studies and reduced the percent root lesions caused by Fusarium spp. when compared with the nontreated controls. NaCl was more effective than formononetin in reducing the percentage of root lesions in both field and greenhouse experiment when compared with ...Continue Reading

Citations

Apr 17, 2004·Mycorrhiza·Roger T Koide, Barbara Mosse
Nov 11, 2009·Phytopathology·Anatoliy V LyginVera V Lozovaya
May 25, 2005·Journal of Experimental Botany·José-Miguel BareaConcepción Azcón-Aguilar
Dec 1, 2020·Biomedicine & Pharmacotherapy = Biomédecine & Pharmacothérapie·Debolina ChakrabortySagarika Biswas

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