phycomycetes
藻菌植物
藻菌植物
Phycomycetes n 1 :
a large and probably unnatural group of fungi and funguslike organisms comprising the Mastigomycota (
including the Oomycetes )
and Zygomycota subdivisions of the division Eumycota ;
a category not used in all systems [
synonym : {
Phycomycetes }, {
Phycomycetes group }]
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 .]
Phycomycetes \
Phy `
co *
my *
ce "
tes \,
n .
pl . [
NL .;
Gr .
fy ^
kos seaweed mycetes .] (
Bot .)
A large ,
important class of parasitic or saprophytic fungi ,
the algal or algalike fungi .
The plant body ranges from an undifferentiated mass of protoplasm to a well -
developed and much -
branched mycelium .
Reproduction is mainly sexual ,
by the formation of conidia or sporangia ;
but the group shows every form of transition from this method through simple conjugation to perfect sexual reproduction by egg and sperm in the higher forms . -- {
Phy `
co *
my *
ce "
tous },
a .
[
Webster 1913 Suppl .]
安装中文字典英文字典查询工具! 中文字典英文字典工具:
复制到剪贴板
英文字典中文字典相关资料:
Mountain View Manor | Prescott, AZ | Skilled Nursing Care Mountain View Manor, Prescott, AZ Mountain View Manor, Prescott, AZ Mountain View Manor, Prescott, AZ