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Journal of Biometrics & Biostatistics

Journal of Biometrics & Biostatistics

ISSN: 2155-6180

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Fungal Biomass

Fungal biomass is easy to dry because its structure does not tend to collapse and lead to case hardening, as does bacterial biomass. Using a continuous band drier with single-pass warm-air downflow, an air temperature of 75 °C is optimal for drying a Penicillium mycelium ex-vacuum filter at 20% solids; a residence time of 20–30 min produces a product of 8–10% moisture. Heating at too high a temperature reduces the nutritional value of the product because of alteration in lysine availability. Other forms of simple driers such as rotary drum driers are also applicable. Balance sheets of the C allocation in AM and non-mycorrhizal plants, taking into account their P nutrition and growth, have given a reasonably consistent picture of the proportion of plant photosynthate used by the fungal symbiont both in growth and respiration. By feeding 14CO2 to AM and non-mycorrhizal plants matched for shoot P concentration or to a single plant with a split (AM and non-mycorrhizal) root system and determining the distribution of label in different fractions after a chase period, it has been calculated that AM roots of a range of herbaceous and woody plants receive about 4–20% more of the total photosynthate than non-mycorrhizal roots (Koch and Johnson, 1984; Harris and Paul, 1987; Douds et al., 1988, 2000; Jakobsen and Rosendahl, 1990; Eissenstat et al., 1993). C is deployed in growth of the intra- and extraradical mycelium and in respiration to support both growth and maintenance, representing a considerable increase in C flux to the soil. At this stage there is little indication of the reasons for the variations in the estimates, but they are likely to include species of plant and fungus, fungal biomass and rate of colonization, as well as the metabolic activity of the fungus.

 

 

Fungal biomass is easy to dry because its structure does not tend to collapse and cause hardening, just like bacterial biomass. Using a continuous belt dryer with a downward flow of hot single pass air, an air temperature of 75 ° C is optimal for drying a Penicillium mycelium vacuum filter at 20% solids; a residence time of 20 to 30 min produces a product of 8 to 10% humidity. Heating to too high a temperature reduces the nutritional value of the product due to the impaired availability of lysine. Other forms of simple dryers such as rotary tumble dryers are also applicable. The balance sheets for the allocation of C in AM and non-mycorrhizal plants, taking into account their nutrition and P growth, gave a reasonably consistent picture of the proportion of plant photosynthate used by the fungal symbiont both for growth and respiration. By supplying 14CO2 to AM and non-mycorrhizal plants adapted to the concentration of P shoots or to a single plant with a divided root system (AM and non-mycorrhizal) and by determining the distribution of the label in different fractions after a hunting period , it has been calculated that AM roots in a range of herbaceous and woody plants receive about 4-20% more total photosynthesis than non-mycorrhizal roots (Koch and Johnson, 1984; Harris and Paul, 1987; Douds et al ., 1988, 2000; Jakobsen and Rosendahl, 1990; Eissenstat et al., 1993). C is deployed in the growth of mycelium intra and extraradical and in respiration to support both growth and maintenance, which represents a considerable increase in the flow of C to the soil. At this stage, there is little indication of the reasons for the variations in the estimates, but they are likely to include plant and fungus species, fungal biomass and colonization rate, as well as metabolic activity of the fungus.

 

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