Ascomycetes
子囊菌纲
子囊菌纲
Ascomycetes n 1 :
large class of higher fungi coextensive with division Ascomycota :
sac fungi [
synonym : {
Ascomycetes }, {
class Ascomycetes }]
Fungi \
Fun "
gi \ (
f [
u ^]
n "
j [
imac ]),
n .
pl .;
sing . {
fungus }. (
Biol .)
A group of thallophytic plant -
like organisms of low organization ,
destitute of chlorophyll ,
in which reproduction is mainly accomplished by means of asexual spores ,
which are produced in a great variety of ways ,
though sexual reproduction is known to occur in certain {
Phycomycetes },
or so -
called algal fungi .
They include the molds ,
mildews ,
rusts ,
smuts ,
mushrooms ,
toadstools ,
puff balls ,
and the allies of each .
In the two -
kingdom classification system they were classed with the plants ,
but in the modern five -
kingdom classification ,
they are not classed as plants ,
but are classed in their own separate kingdom fungi ,
which includes the phyla Zygomycota (
including simple fungi such as bread molds ),
Ascomycota (
including the yeasts ),
Basidiomycota (
including the mushrooms ,
smuts ,
and rusts ),
and Deuteromycota (
the {
fungi imperfecti }).
Some of the forms ,
such as the yeasts ,
appear as single -
celled microorganisms ,
but all of the fungi are are eukaryotic ,
thus distinguishing them from the prokaryotic microorganisms of the kingdon Monera .
[
Webster 1913 Suppl .
PJC ]
Note :
The Fungi appear to have originated by degeneration from various alg [
ae ],
losing their chlorophyll on assuming a parasitic or saprophytic life .
In an earlier classification they were divided into the subclasses {
Phycomycetes },
the lower or algal fungi ;
the {
Mesomycetes },
or intermediate fungi ;
and the {
Mycomycetes },
or the higher fungi ;
by others into the {
Phycomycetes };
the {
Ascomycetes },
or sac -
spore fungi ;
and the {
Basidiomycetes },
or basidial -
spore fungi .
[
Webster 1913 Suppl .]
Ascomycetes \
Ascomycetes \
n .
1 .
1 large class of higher fungi .
Syn :
class Ascomycetes .
[
WordNet 1 .
5 ]
Ascomycetes \
As `
co *
my *
ce "
tes \,
n .
pl . [
NL .;
ascus Gr . ?, ?,
fungus .] (
Bot .)
A large class of higher fungi distinguished by septate hyph [
ae ],
and by having their spores formed in asci ,
or spore sacs ;
the sac fungi .
It comprises many orders ,
among which are the yeasts ,
molds ,
mildews ,
truffles ,
morels ,
etc .
The class is coextensive with the phylum Ascomycota . --
{
As `
co *
my *
ce "
tous },
a .
[
Webster 1913 Suppl .
WordNet 1 .
5 ]
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