Publication Type

Journal Article

Journal Name

Sydowia

Publication Date

3-31-2022

Abstract

Ecological traits that filter the occurrence of species and functional groups responding to environmental and other variables are keys to the assembly processes of communities, but little is currently known about these processes for endophytic fungi. A trophic-based joint species distribution model was applied to endophyte occurrence by 110 crucifer-inhabiting fungal species isolated from Brassica rapa, Raphanus sativus and Brassica oleracea, from 21 sites with different landscape compositions and pesticide use over four seasons. We investigated the responses of taxonomie diversity, function diversity and functional composition. Season, plant identity and plant part were significant factors in shaping all indices. Elevation and grassland shaped taxonomie diversity and fimctional composition but not functional diversity. RLQ and fourth comer analysis showed that pathotroph, symbiotroph, dung saprotroph, endophyte, epiphyte and plant pathogen were positively correlated with autumn and summer seasons, white cabbage, leaf tissues and elevation; while saprotroph, animal pathogen, fungal parasite, undefined saprotroph, wood saprotroph and yeast-like were positively correlated with spring and winter seasons, root tissues, grassland and water in the landscape. Our results show that taxonomie diversity, functional diversity and functional composition are partially coupled, indicating that variable filters could influence cruciferous fungal endophytes at species and trait levels.

Keywords

Brassicaceae, environmental filter, functional dispersion, fungal community, landscape

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