Molecular phylogeny of Rigidoporus microporus isolates associated with white rot disease of rubber trees (Hevea brasiliensis)

Oghenekaro, Abbot O.; Miettinen, Otto; Omorusi, V. I.; Evueh, G. A.; Farid, Mohd. A.; Gazis, Romina; Asiegbu, Fred O.

doi:10.1016/j.funbio.2014.04.001

Cited by 31 publications

(30 citation statements)

References 35 publications

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“…It is difficult to speculate on whether the higher saprotrophic ability of this isolate also suggests a potential to be pathogenic on H. brasiliensis plantations especially if it undergoes a host-shift. Possibility for a host-shift of R. microporus from other trees to H. brasiliensis or vice-versa has been proven through molecular studies (Oghenekaro et al 2014). The fungus has recently been reported for the first time as pathogenic on Artocarpus nobilis Thw.…”

Section: Discussionmentioning

confidence: 99%

“…The source of the type specimen of R. microporus (Sw.) Overeem 1788 was from West Indies, but the source of the type specimen of the synonym R. lignosus (Klotzsch) Imazeki is not given in the literature and probably does not exist anymore (Ryvarden, 1976). In an earlier multigene phylogenetic study, we were able to separate R. microporus isolates causing WRD in Africa and Asia into two different groups (Oghenekaro et al 2014). Non-pathogenic isolates from Peru and a herbarium specimen of a sample from Cuba identified as R. microporus were also separated into different groups (Oghenekaro et al 2014).…”

Section: Introductionmentioning

confidence: 88%

“…In an earlier multigene phylogenetic study, we were able to separate R. microporus isolates causing WRD in Africa and Asia into two different groups (Oghenekaro et al 2014). Non-pathogenic isolates from Peru and a herbarium specimen of a sample from Cuba identified as R. microporus were also separated into different groups (Oghenekaro et al 2014). White rot disease attack of rubber wood plantations is well known throughout Southeast Asia, central, east and West Africa.…”

Section: Introductionmentioning

confidence: 92%

“…The isolates were previously grouped together as R. microporus. The African and Asian isolates were more closely related and were isolated from WRD diseased H. brasiliensis trees (Oghenekaro et al 2014). The fungi were routinely maintained on 2% w/v malt extract agar plates (MEA).…”

Section: Fungal Isolatesmentioning

confidence: 99%

“…Epidemiological studies of H. brasiliensis natural forest and plantations showed high fungal density in soil (Nandris et al 1988) suggesting a capacity for high biodegradative ability of plant residues by R. microporus. Majority of previous studies on R. microporus has been directed at population biology and molecular phylogeny Oghenekaro et al 2014), pathogenicity (Farid et al 2009;Kaewchai et al 2009;Madushani et al 2013), host-parasite interactions (Nicole et al, 1985;Nicole et al 1986a;1986b), peroxidases (Geiger et al 1989) and laccases, with the latter being isolated, purified and studied in detail (Nicole et al 1992;Bonomo et al 1998;2001;Cambria et al, 2000;2011;2012). In vitro studies have focused on biological control of the pathogen Ogbebor et al 2015).…”

Section: Introductionmentioning

confidence: 99%

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The saprotrophic wood-degrading abilities of <i>Rigidoporus microporus</i>

Oghenekaro¹,

Daniel²,

Asiegbu³

2015

Silva Fenn.

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• Rigidoporus microporus isolates displayed varying saprotrophic capabilities on wood blocks of Rubber tree (Hevea brasiliensis).• Percentage mass loss of (Hevea brasiliensis) wood blocks caused by the pathogenic Rigidoporus microporus was significantly higher than that observed with the endophytic isolate.• The endophytic isolate has very poor saprotrophic ability on Hevea brasiliensis wood blocks. AbstractSaprotrophic wood-decaying abilities of Rigidoporus microporus (Polyporales, Basidiomycota) syn. Rigidoporus lignosus and the structural alterations induced in wood blocks of Hevea brasiliensis Muell. Arg were studied. Mass loss of wood blocks was analyzed after 3 and 6 months respectively and the patterns of decay by pathogenic and endophytic isolates of this fungus were investigated using light microscopy. Effects of temperature on growth of the isolates on malt extract agar were also investigated. The R. microporus isolated from a non-H. brasiliensis host caused the highest percentage mass loss (27.2% after 6 months), followed by isolates ED310 (21.1%) and M13 (15.7%), both collected from diseased H. brasiliensis plantations. The isolate initially identified as an endophyte showed very low saprotrophic wood decay capability (4.3% after 6 months). The optimal temperature for growth of the isolates was 30 °C; except for the endophytic isolate which showed highest growth at 25 °C. Wood samples degraded by the R. microporus isolates showed simultaneous attack of wood cell walls, typical of white rot fungi. Results of the study indicate variability in the wood degrading abilities of the isolates and the potential differences in their physiology are discussed. Our findings further support the need for a taxonomical revision of the Rigidoporus genus.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 92%

Section: Fungal Isolatesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The saprotrophic wood-degrading abilities of <i>Rigidoporus microporus</i>

Oghenekaro¹,

Daniel²,

Asiegbu³

2015

Silva Fenn.

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Viability of non‐edible oilseed plants and agricultural wastes as feedstock for biofuels production: a techno‐economic review from an African perspective

Kichonge

Kivevele

2023

Biofuels Bioprod Bioref

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Given the benefits of biofuels over conventional fuels, there is concern that widespread production of biofuels from edible feedstocks to meet demand will lead to food insecurity and other socioeconomic challenges. Thus, the goal of this research is to look into the techno‐economic potential of non‐edible oilseed plants and agricultural wastes as primary feedstocks for biofuel production in Africa. The inability of biofuel to cope in the fuel market has been demonstrated to be due to the high production costs, which limit profitability because the end price is heavily influenced by that of conventional fuel. However, the high production costs are entirely due not only to components such as feedstock, conversion processes, and infrastructure but also to a lack of techno‐economic assessment (TEA). African biofuel production can be competitively industrialized through the adoption of strong supportive policies and programs. Adoption of these policies and programs is critical for capitalizing on the benefits of non‐edible feedstocks in biofuel production while also boosting rural development through job creation. Techno‐economic assessment of conversion processes and infrastructure is recommended to provide a clear picture of the techno‐economic aspects, serving as a blueprint for the design of biofuel production facilities. Further, TEA has been shown to be a useful tool in the development process of new technologies aimed at lowering overall production costs and making biofuel more affordable. The combination of TEA and enabling policies and programs will increase the price competitiveness of biofuels, allowing them to capture a sizable share of the fuel market.

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