The Myxomycetes II

Alexopoulos, Constantine J.

doi:10.1007/bf02860818

Cited by 82 publications

(16 citation statements)

References 144 publications

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“…Pure cultures of these organisms fused with themselves but not with each other. This extends the reports on crude cultures of plasmodia of different species which did not fuse (Alexopoulos, 1963) and different geographical isolates of the same species which did not fuse (Gray, 1945) to pure cultures as well. Carlile dz Dee (1967) have recently reported similar results on fusion with pure cultures of P. polycephalum.…”

Section: Resultssupporting

confidence: 87%

Nutritional Requirements for the Growth in Pure Culture of the Myxomycete Physarum rigidum and Related Species

Henney¹,

Henney

1968

Journal of General Microbiology

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S U M M A R YPhysarum rigidum grew and sporulated in pure culture at pH 4-2 on a partially defined medium containing : mineral salts, glucose, yeast extract, haematin, casein hydrolysate. The inoculum equiv. 0.22 mg. protein/z5 ml. grew to equiv. 21 '5 mg. protein/25 ml. in about I 2 days. Physarumflavicomum varieties I and 2 also grew and sporulated on this medium. The yeast extract and haematin were essential for growth; the casein hydrolysate was not. Omission of glucose resulted in a 50% decrease in growth yield. Ethanol, galactose, glycerol, lactose, mannitol, mannose, potato starch, raffinose or sorbitol could replace glucose, but the growth yield was decreased. Fructose, inulin, sucrose and the pentoses and carboxylic acids tested did not support growth.

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Section: Resultssupporting

confidence: 87%

Nutritional Requirements for the Growth in Pure Culture of the Myxomycete Physarum rigidum and Related Species

Henney¹,

Henney

1968

Journal of General Microbiology

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“…Alexopoulos (1960Alexopoulos ( , 1963Alexopoulos ( , 1966 has recently focused attention on this aspect and has described three general types of plasmodia corresponding to the major groups in the myxomycetes. However, little significance has been placed on the differences in plasmodia within the different groups, mainly because of the variability of the plasmodium under different environmental conditions.…”

Section: Discussionmentioning

confidence: 99%

“…The life cycle of the myxomycetes (Alexopoulos, 1963) is initiated by the liberation of myxamoebae from the haploid spores. The myxamoebae divide mitotically and when a large population has formed two myxamoebae fuse to form a diploid zygote.…”

Section: Introductionmentioning

confidence: 99%

The Mating-type Systems of the Myxomycetes Physarum rigidum and P. flavicomum

Henney¹,

Henney

1968

Journal of General Microbiology

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SUMMARYThree geographical collections (isolates) of myxomycetes originally identified as PhysarumJlavicomum were found to be heterothallic and the clones established from each isolate were divided into two mating types. Previous studies of six isolates of P.Javicomum showed that they could be divided into three groups. Mating occurred within groups but not between groups, and within each group there were two or more mating types. When the new isolates were crossed to the original isolates, they conformed to two of these three groups. This study established the existence of multiple alleles at the incompatibility locus in group 3. Mating-type alleles of the Fl generation of group 3 segregated in a I : I ratio at meiosis. Isolates belonging to group I were also separated from the other two groups on morphological and physiological bases. The morphological description fits that of P. rigidum more nearly than P. Jlavicomum and group I isolates were placed in the species P. rigidurn. Groups z and 3 were separated genetically and physiologically but morphologically the separation was not distinct. These groups were referred to as P.Jlavicomum varieties I and 2.

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“…Generally, myxomycetes have small fruiting bodies, ranging in size from a few centimeters to less than 1 mm. The fruiting bodies are frequently overlooked in the field because they occur sporadically and are ephemeral and fugacious, being preyed on by microbes (Madelin 1984) or disintegrated by rainfall (Alexopoulos 1963;Eliasson 1981). Therefore, studies of the flora and ecology of myxomycetes are difficult, resulting in a paucity of data and little ecological research.…”

Section: Introductionmentioning

confidence: 99%

Geographical distribution of myxomycetes on coniferous deadwood in relation to air temperature in Japan

Takahashi

Hada

2010

Mycoscience

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This study obtained information on the biogeographical distribution of lignicolous myxomycetes in temperate regions in Japan. It examined how climatic variables are related to patterns of occurrence in myxomycete communities. Sixty-four taxa were recorded on coniferous wood in 15 forest sites in summer. Common species that were abundant and widely distributed in Japan included Stemonitis axifera, Lycogala epidendrum, and Cribraria cancellata. In addition, Lindbladia cribrarioides was characteristic on dead Pinus densiflora wood in southwestern Japan. The species diversity index (H 0 ) of the myxomycete communities was positively correlated with the annual mean temperature. The distribution of myxomycete communities was analyzed using nonmultidimensional scaling (NMDS). The ecological nature of the gradients expressed by the first two NMDS axes was that the first axis was found to correspond strongly to changes in the average minimum temperature and the latitude, and the second axis was related to a complex of factors, including altitude. The relative abundance of certain species in a myxomycete community on Japanese red pine changed in relation to the annual mean temperature, e.g., Lycogala epidendrum correlated negatively while Stemonitopsis hyperopta did so positively. We conclude that air temperatures can be used to predict the geographical distribution of lignicolous myxomycetes in this temperate region of Japan.

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The Myxomycetes II

Cited by 82 publications

References 144 publications

Nutritional Requirements for the Growth in Pure Culture of the Myxomycete Physarum rigidum and Related Species

Nutritional Requirements for the Growth in Pure Culture of the Myxomycete Physarum rigidum and Related Species

The Mating-type Systems of the Myxomycetes Physarum rigidum and P. flavicomum

Geographical distribution of myxomycetes on coniferous deadwood in relation to air temperature in Japan

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