Myxobiota of the Brazilian Atlantic Forest: species on oil palm tree (Elaeis guineensis, Arecaceae)

Abstract

Elaeis guineensis Jacq. (Arecaceae), the oil palm tree, serves as a phorophyte for many different groups of organisms, someof whichhelp decompose organic matter comingfromthe organs of the tree itself or fromremainsof other plants retained in leaf sheaths. To study the myxobiota of E. guineensis, we examined living and dead trunks, leaves, bracts and inflorescences in the Gurjaú Ecological Reserve, in the township of Cabo de Santo Agostinho, Pernambuco, Brazil. Incidence and species abundance were determined in three Atlantic forest fragments. The reported species are listed herein, followed the known distribution of each species in Brazil, and which of them occur on palm trees. All of the subclasses and five orders were recorded and 22 species were added to the list of myxomycetes associated with oil palm trees in Brazil. The highest incidence value was recorded on dead leaves. Ceratiomyxa fruticulosa (O. F. Müll.) T. Macbr., Arcyria cinerea (Bull.)Pers. and Physarum compressum Alb.& Schwein. werethe most commonspecies, while Hemitrichia serpula (Scop.) Rostaf. ex Lister showed the highest levels of abundance and incidence, thus confirming its preference for the substrates provided by palm trees.

Microhabitats occupied by Myxomycetes in the Brazilian Atlantic Forest: Heliconiaceae inflorescences

“…(Arecaceae), on fragments of Lowland Dense Ombrophilous Forests (Silva and Cavalcanti, 2010). The only representative of the Trichiaceae, A. cinerea was the second most abundant species in the present study, sporulating on the flower and bract of H. psittacorum, on material derived from lowland forests.…”

“…It was included by Schnittler and Stephenson (2002) among the 13 floricolous species with more than five records in the studies conducted in the forests of Ecuador, sporulating on inflorescences of plants belonging to different genera of Zingiberales, with an occurrence percentage in moist chambers of 3.6% in its typical form and 8.1% in its dwarf form, and was also observed in the field (13 specimens). In Brazil, Maimoni-Rodella and Cavalcanti (2006) also include A. cinerea among the species occurring on H. coronarium inflorescences and Silva and Cavalcanti (2010) refer to its presence on inflorescences of E. guineensis, in a fragment of Lowland Dense Ombrophilous Forests in the Gurjaú Ecological Reserve, in Pernambuco.…”

“…Found in Restinga Forests and Lowland Dense Ombrophilous Forests, over dead leaves, herbaceous stalks, thin branches, palm tree inflorescences, rare on wood (Hochgesand and Gottsberger, 1996;Silva and Cavalcanti, 2010). …”

“…In Brazil, information on the occurrence of Myxomycetes in inflorescences is scarce and dispersed in the literature (Cavalcanti and Mobin, 2004;Ferreira and Cavalcanti, 2010;Hochgesand and Gottsberger, 1996;Silva and Cavalcanti, 2010), and only Maimoni-Rodella and Cavalcanti (2006) deal specifically with the subject, recording the occurrence of five species in living plants of Hedychium coronarium J. König (Zingiberaceae), in the state of São Paulo.…”

Diversity of Brazilian Fungi

“…Among these publications, included or not in the database, we found some related to: Pucciniales (Carvalho Jr. & Hennen 2010, 2012Salazar-Yepes & Carvalho Jr. 2010a, b, 2012; conidial fungi, with new genera, species and records for Brasil Barbosa & Gusmão 2011;Izabel et al 2011;Cruz et al 2012;Almeida et al 2013;Barbosa et al 2013;Fiuza et al 2014;Monteiro & Gusmão 2013;Monteiro et al 2014a, b); Ingoldian fungi (Fiuza & Gusmão 2013aFiuza et al 2015), zoosporic fungi (Nascimento et al 2012;Jesus et al 2013), new species and records of Myxomycetes (Alves et al 2010;Bezerra et al , 2014Silva & Cavalcanti 2010;Costa et al 2011Costa et al , 2014Damasceno et al 2011;Silva & Cavalcanti 2012;Parente & Cavalcanti 2013;Cavalcanti et al 2014Cavalcanti et al , 2015, new species and records of Zygomycota (Santiago et al 2011a(Santiago et al , b, 2013Souza et al 2012Souza et al , 2014; new orders, families, genera, species, recombinations and review in Glomeromycota (Goto et al 2011(Goto et al , 2013Mello et al 2012Mello et al , 2013Oehl et al 2011a, b;Pontes et al 2013), including phylogenetic studies of Gigasporales . In Ascomycota: new genus and species of histeriaceous fungi , generic reviews of: Ascobolus and Saccobolus (Melo et ...…”