Fungal endophytes in germinated seeds of the common bean, Phaseolus vulgaris
2016
Parsa, Soroush | García-Lemos, Adriana M. | Castillo, Katherine | Ortiz, Viviana | López-Lavalle, Luis Augusto Becerra | Braun, Jerome | Vega, Fernando E.
We conducted a survey of fungal endophytes in 582 germinated seeds belonging to 11 Colombian cultivars of the common bean (Phaseolus vulgaris). The survey yielded 394 endophytic isolates belonging to 42 taxa, as identified by sequence analysis of the ribosomal DNA internal transcribed spacer (ITS) region. Aureobasidium pullulans was the dominant endophyte, isolated from 46.7 % of the samples. Also common were Fusarium oxysporum, Xylaria sp., and Cladosporium cladosporioides, but found in only 13.4 %, 11.7 %, and 7.6 % of seedlings, respectively. Endophytic colonization differed significantly among common bean cultivars and seedling parts, with the highest colonization occurring in the first true leaves of the seedlings.
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