Defense responses and symbiotic functional initiation in trifoliate orange‒arbuscular mycorrhizal fungi interaction
Chemical and Biological Technologies in Agriculture(2024)
Abstract
Arbuscular mycorrhizal fungi (AMF) trigger beneficial effects on their hosts, but it is unknown how plants modulate their defense responses during root colonization of AMF and the symbiotic benefits are initiated. The purpose of this study was to analyze the root mycorrhizal colonization process of trifoliate orange and the responsive patterns of plant growth, root peroxide hydrogen (H2O2), antioxidant enzymes and their encoding gene expression, and sugar, lipid and phosphate transporter protein gene expression at 7‒56 days of inoculation (doi) with Funneliformis mosseae (Fm). Fm developed appressoriums on the root surface at 7 doi, followed by abundant arbuscules in root cortical cells at 28 doi, intracellular vesicles at 42 doi, and root mycorrhizal colonization rate of 41.54
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Key words
Antioxidant defense system,Trifoliate orange,Hydrogen peroxide,Lipids,Mycorrhiza,SWEET sucrose transporter,Symbiosis
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