Abstract
Abstract Marasmius palmivorus is a marasmioid fungal species that exhibits parasitic behaviour, although most marasmioids are rarely parasitic. The fungus has been reported to cause fruit bunch rot disease of oil palm and coconut, but only a few studies on its pathogenic behaviour are available, particularly on oil palm. Hence, there is a need to assess the ability of the fungus to act as a pathogen and to study its molecular evolution and taxonomy. Nine isolates of M. palmivorus were successfully isolated from basidiocarps and diseased fruitlets of oil palm collected from oil palm plantations and were morphologically characterized on potato dextrose agar (PDA) followed by molecular identification based on nucleotide sequence alignments of internal transcribed spacer (ITS) regions of ribosomal RNA (rRNA) gene clusters with sequences from GenBank. Koch's Postulates confirmed that M. palmivorus could infect oil palm fruitlets with symptoms similar to those observed for bunch rot disease. Molecular phylogenetic studies using nucleotide sequences of ITS and the nuclear ribosomal large subunit (nLSU) showed that isolates sharing the same phenotypic characteristics of Marasmius palmivorus and Marasmiellus palmivorus are monophyletic and share a common ancestor. The fungus has also been shown to be more closely related to the genus Marasmius than Marasmiellus ; therefore, we support retention of the taxon name of the pathogen causing bunch rot disease of oil palm as Marasmius palmivorus .
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Claims 4
Claim · model-written summary
Koch's postulates confirmed that Marasmius palmivorus can infect oil palm fruitlets with symptoms similar to those of bunch rot disease.
- Taxon
- oil palme0
- Organ / stage
- fruitletse0
- Interactor
- M. palmivorusParamarasmius palmivoruse0pathogen
- Outcome
- infect oil palm fruitlets with symptoms similar to those observed for bunch rot diseasee0
Not reportedDirection
Verbatim
e0“Koch's Postulates confirmed that M. palmivorus could infect oil palm fruitlets with symptoms similar to those observed for bunch rot disease”
Claim · model-written summary
Isolates with the phenotypic characteristics of Marasmius palmivorus and Marasmiellus palmivorus are monophyletic and share a common ancestor in ITS and nLSU phylogenies.
- Taxon
- Marasmius palmivorusParamarasmius palmivoruse0
- Outcome
- monophyletic and share a common ancestore0
Verbatim
e0“isolates sharing the same phenotypic characteristics of Marasmius palmivorus and Marasmiellus palmivorus are monophyletic and share a common ancestor”
Claim · model-written summary
The fungus is more closely related to the genus Marasmius than to Marasmiellus.
Verbatim
e0“The fungus has also been shown to be more closely related to the genus Marasmius than Marasmiellus”
Claim · model-written summary
The authors support retaining the name Marasmius palmivorus for the pathogen causing bunch rot disease of oil palm.
Verbatim
e0“we support retention of the taxon name of the pathogen causing bunch rot disease of oil palm as Marasmius palmivorus”