Biology Reference
In-Depth Information
c
2
b
c
4
a
Acervulus
c
1
c
3
Pycnidium
Sporodochium
Synnema
Tuberculariaceae; c
2
dard conidiophores and conidia of
Dematiaceae; c
3
hyaline conidia in chains, Moniliaceae;
c
4
conidiophores grouped into a synnema, Stilbaceae
Fig. 5
Spore formation in the Deuteromycetes. a
Sphaeropsidales, conidia in pycnidum. b Melanconiales,
conidia in acervulus. c Moniliales - c
1
sporodochium of
a
b
c
d
e
f
g
1
1
1
2
2
2
Fig. 6
Spore forms in the Deuteromycetes, commonly
designated by letters and figures. a Amerosporae, one-
celled; a
1
Hyalosporae, spores hyaline; a
2
Phaeosporae,
spores
c Phragmosporae, spores with two or more cross septa;
c
1
Hyalophragmiae, hyaline or light; c
2
Phaeophragmiae,
dark. d Dictyosporae, muriform spores. e Scolecosporae,
filiform spores. f Helicosporae, spirally coiled spores.
g Staurosporae, starlike spores
b
1
dark.
b Didymosporae,
two-celled;
b
2
Hyalodidymae,
hyaline;
Phaeodidymae,
dark.
exist. Most of them are in the Ascomycetes. The
groupings are based on conidia: hyaline or col-
ored; with one, two, or several cells; formed in
pycnidia, on acervuli (little cushions of hyphae
breaking through the host epidermis), or free on
the surface of the host (see
Figs. 5
and
6
).
Sphaerioidaceae (Sphaeropsidaceae
Phyllostictaceae) Pycnidia more or less globose,
ostiolate or closed; walls dark, tough, leathery or
carbona ceous.
Nectrioidaceae As above but walls or stroma
bright-colored, fleshy or waxy.
Leptostromataceae Pycnidia dimidate (having
the outer wall covering only the top half); usually
radiate, sometimes long and cleft.
Sphaeropsidales
Conidia borne in pycnidia or chambered cavities.
