Identities, Characteristics, and Assemblages of
Dematiaceous-Endophytic Fungi Isolated
from Tissues of Barnyard Grass Weed
Dindo King M. Donayre1 and Teresita U. Dalisay2
1Crop Protection Division, Philippine Rice Research Institute
Central Experiment Station, Maligaya, Science City of Muñoz, 3119 Nueva Ecija
2Crop Protection Cluster, College of Agriculture,
University of the Philippines Los Baños, College, 4301 Laguna
corresponding author: no email
Barnyard grass weed (E. glabrescens) in ricefields of Nueva Ecija, Philippines had been reported to harbor different isolates of endophytic fungi. Despite the discovery that its tissues were hosts of diverse endophytic fungi, the identities, characteristics, and assemblages particularly of the dematiaceous-endophytic fungi are still unknown. This paper, thus, aimed to identify, and describe the characteristics and assemblages of the different dematiaceous-endophytic fungi that were isolated from tissues of barnyard grass weed of Nueva Ecija, Philippines. Microscopic examination revealed that there were eight common genera of dematiaceous-endophytic fungi residing in tissues of barnyard grass weed namely Alternaria, Arthrinium, Bipolaris, Curvularia, Nigrospora, and Stemphyllium along with the two unidentified coded genera. Further examination of the taxonomic characteristics and assemblages showed that there were two species in the genus of Alternaria (A. alternate and A. tenuissima) while four for Bipolaris (B. australienses, Bipolaris sp. EF-ds102, B. avenacea, and Bipolaris rostrata), four for Curvularia (C. lunata, C. prasidii, C. pallescens, and Curvularia sp. EF-ds427), and two for Nigrospora (N. oryzae and Nigrospora sp. EF-ds180).
Endophytic fungi are organisms that are capable of living inside plant tissues without causing harm to their hosts (Caroll 1988, Petrini 1991, Stone et al. 2004). Although they may form other interrelationships such as commensalism, and latent/quiescent parasitism, their interrelationships with their hosts are generally mutualistic, that is, the host gains while the endophytic fungi are also gaining (Clay, 1991; Backman and Sikora, 2008). Endophytic fungi have been reported to have many uses. Hence, explorations about their ecological role; beneficial uses for human and animal health; and growth promotions, drought tolerance, and protection of crops against pests are widely increasing around the world (Arnold et al. 2003, Evans 2003, Tian et al. 2004, Kuldau & Bacon 2008, Ting et al. 2008, Ahmad et al. 2010, Hipol 2012, Bungihan 2013 et al., Tan et al., Eskandarighadikolaii et al., 2015). . . . read more
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