Sentence:  Detailed view of a typical fine endophyte <WSD>arbuscle</WSD> in the inner cortex. Note the well preserved structural integrity of the endophyte and the characteristic bifurcate hyphae .... Infection was with the fine endophyte "w:Glomus (fungus) 
Meaning of the word marked with <WSD> tags:  The site at which a symbiotic fungus attaches to the roots of a plant and exchanges nutrients, etc., with it.