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International Journal of Medicinal Mushrooms

Published 12 issues per year

ISSN Print: 1521-9437

ISSN Online: 1940-4344

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 1.2 To calculate the five year Impact Factor, citations are counted in 2017 to the previous five years and divided by the source items published in the previous five years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) 5-Year IF: 1.4 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 0.3 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00066 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.34 SJR: 0.274 SNIP: 0.41 CiteScore™:: 2.8 H-Index: 37

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Mineral Uptake by First Flush Mushrooms (Pleurotus spp.) Cultivated on Various Agro-Processing Waste

Volume 7, Issue 3, 2005, 484 pages
DOI: 10.1615/IntJMedMushrooms.v7.i3.1120
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ABSTRACT

The use of agro-processing waste as raw materials for mushroom production was investigated to define a strategy for bioconverting these wastes into edible basidiomata and, hence, retrieve some of the lost nutrients. Sampled wastes (corn cobs and maize bran, cocoa husk and shells, oil palm fiber, empty bunch and kernel cake, spent malt, pito mash, yam, cassava, cocoyam, potato and plantain peelings, rice husk and bran) from both industrial and traditional agro-processors were characterized chemically and formulated into media. In all, 10 formulations were derived. Two species of PleurotusP. ostreatus (strain EM1) and P. eous (strain OT3)—were used for substrate evaluation. During this cultivation process the ability or lack of these species to take up minerals (Ca, Cu, Fe, Mg, Mn, P, K, and Na) from the formulated media was investigated.
Mineral absorption by the first flush mushrooms during growth on the various media was determined and compared to the amount present in the original and spent media. Ca, Cu, Fe, Mg, Mn, and P were determined using a Perkin Elmer 3110 Atomic Absorption Spectrometer. K and Na were determined using a Jenway PFP7 Flame Photometer. Analysis of variance between the various determinations was done. The correlation between concentration of elements and total yield was also investigated. There was uptake of all the minerals determined, as present in the media, by the first flush mushrooms. Intake, however, of elements by mushrooms differed considerably among the various minerals to the extent that, although mushrooms might be observed to behave almost as a filter for some elements, they accumulate others. The data suggested that K and P had the highest concentrations in the mushrooms, while Mn and Ca had the lowest. Mg, Ca, Mn, and K concentrations were lower in the mushrooms compared to the initial and exhausted media, indicating that there was no appreciable accumulation after their infiltration into the mushrooms. There was appreciable accumulation of Cu, as the concentration in the mushrooms was higher than in the initial media. The concentration of P in mushrooms was comparable to that of the initial media. There was accumulation of Na in the mushrooms and the concentration was comparable to that in the exhausted media. The concentration of K was generally high compared to the other minerals. Calcium was not significantly present in the mushrooms analyzed despite its high concentration in the formulated media.
The highest colonization rates and sporophore yields were achieved from corn cob and cocoa husk-based substrates, whereas lesser yields were produced from rice husk-based media. Yield from tuber-based (cassava, yam, and cocoyam peelings) media could not be relied upon due to contamination that resulted in incomplete spawn run. There was generally no correlation between mineral uptake and yield.
The study generally demonstrated the ability of Pleurotus to absorb these elements during cultivation, albeit to varying extents. Hence, through controlled addition of specific minerals to substrates on which mushrooms are cultivated, the elements can be absorbed by the growing mycelium, and translocated to the sporophores. The mushrooms then could become good or even excellent sources of these minerals.

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