Discussion
Studies of fungal endophytes in many environments are
an active area for research; however, the endophytes in
soybean and corn have never been systematically characterized.
This work expands our understanding of endophytic
fungi in soybean and corn plants. We have focused on roots,
stems and leaves because many soybean and corn pathogens
commonly colonize these organs. The fungal endophytes
identified in this study are not known to be soybean and corn
pathogens, and the functional associations between these
fungi and soybean and corn plants are unknown. Furthermore,
it is important to mention that none of the plants used
in this study had symptoms of disease. The most prevalent
endophytic fungal species isolated in the organs (root, stem
and leaf) in all soybean cultivars was F. graminearum and
in the two corn cultivars was A. terreus. Pimentel et al.25;
Impullitti and Malvick13 found that Cladosporium was the
endophytic fungal genus most frequently identified from
leaves and stems of soybeans grown in Brazil and Minnesota,
USA whereas Pan et al.23 found this genus in leaves and stems
from corn in Minnesota, USA. In this study only one species of
Zygomycota was isolated in maize plants; species from this
Phylum were isolated as endophytes in Dactylis glomerata
L. and other plants18.
DiscussionStudies of fungal endophytes in many environments arean active area for research; however, the endophytes insoybean and corn have never been systematically characterized.This work expands our understanding of endophyticfungi in soybean and corn plants. We have focused on roots,stems and leaves because many soybean and corn pathogenscommonly colonize these organs. The fungal endophytesidentified in this study are not known to be soybean and cornpathogens, and the functional associations between thesefungi and soybean and corn plants are unknown. Furthermore,it is important to mention that none of the plants usedin this study had symptoms of disease. The most prevalentendophytic fungal species isolated in the organs (root, stemand leaf) in all soybean cultivars was F. graminearum andin the two corn cultivars was A. terreus. Pimentel et al.25;Impullitti and Malvick13 found that Cladosporium was theendophytic fungal genus most frequently identified fromleaves and stems of soybeans grown in Brazil and Minnesota,USA whereas Pan et al.23 found this genus in leaves and stemsfrom corn in Minnesota, USA. In this study only one species ofZygomycota was isolated in maize plants; species from thisPhylum were isolated as endophytes in Dactylis glomerataL. and other plants18.
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