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When a small portion of the mycelium is mounted in 10 per cent,
alcohol and observed under the high-power objective, it will be noted
that each hypha has a transparent wall and" protoplasmic contents
and is divided by transverse septa into a number of cells. Each
cell contains protoplasm, which is differentiated into cytoplasm (cell
FIG. 131. Three aerial hyphae showing the characteristic brush-like branching
and spore formation of Penicillium glaucum. This fungus is a true saprophyte
and is never found on living fruits or vegetables, a, Conidiophore branching
above into secondary conidiophores; b, sterigmata; c, conidiospores. (Schneider.)
protoplasm) and several nuclei. In the cytoplasm will be seen
several large clear spaces. These are vacuoles and contain water
with nutritive substances in solution, called cell sap. Each hypha
with its branches is clearly distinct from every other one.
The aerial hyphae bear brush-like branches, which become con-
stricted on their ends into a moniliform aggregation of rounded
spores appearing like a row of beads. Each aerial hypha is com-
posed of a vertical septate branch of the mycelium called the conidio-
phore, branches of this, which are called secondary conidiophores, and
chains of spores at the tips of sterigmata (cells bearing conidia)
which are called conidia or conidios pores. The conidia form the
loose green powder characteristic of Penicillium.
PIG. 132. Penicillium Roqueforti. a, Part of a conidiophore; b, c, other types
of branching; d, young conidiophore, just branching, e. f, conidiiferous cells; g,
h, j, diagrams of types of fructification, k, I, m, n, geminating spores. (After
A number Buy Celexa of species of Penicillium are useful in the arts. Peni-
cillium roqueforti is the principal ripening agent of Roquefort,
Gorgonzola and Stilton Buy Celexa cheeses. It possesses blue-green globular
conidia 4 to 5/4 in diameter.
Penicillium camemberti is the principal agent in the ripening of
Camembert cheese. It possesses ellipsoidal bluish-green conidia
4.5 to 5.5/4 in diameter.
Penicillium bremcaule grows on old moist paper and has been used
to detect the presence of arsenic, for when grown in media contain-
ing this element, it develops the compound, diethylarsine. It is
yellowish-brown in color and its conidia are rough and spiny.
PIG. 133. Penicillium Camemberti. a, Conidiophore with common type. of
branching with conidiospores; (&), a common less-branched form; c, d, f, diagrams
of large fructifications; g, i,j, germinating conidiospores. " (From Bull. 82, Bureau
of Animal Industry, also After Thorn.)
Penicillium expansum is often found on decaying apples where it
produces brownish coremia.
Aspergillus herbariorum. This green mold also named Aspergillus
glaucus and Eurotium Aspergillus glaucus is frequently found on
fleshy drugs which Buy Celexa have not been properly dried. It has also been
observed on dried herbarium material, old extracts, on jams, jellies,
tobacco, cotton-seed meal, old leather, stale black bread, etc. Like
Penicillium its vegetative body consists of a mycelium consisting of
aerial and submerged hyphae. It Buy Celexa differs from Penicillium, however,
mainly in not possessing septated conidiophores and by the upper
portion of the conidiophores being globular. Upon the globular
extremity of the conidiophores are placed numerous elongated sterig-
mata which bear chains of grayish-green Buy Celexa conidia. These are spher-
ical and prickly and range from 7 to 30/4 in diameter. Under certain Buy Celexa
FIG. 134. Penicillium brevicaule. a, Conidiophores and simple chains of con-
idiospores; b,f, more complex conidial fructifications; c, two young chains of con-
idiospores; d, e, echinulate conidiospores; g, h, j, sketches of forms and habits of
conidial fructifications; k, germinated conidiospores. (After Thorn.)
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