Fig. 22-1, p.35
Feb 11, 2016
Fig. 22-1, p.350
Fig. 22-1, p.351
Fig. 22-2, p.352
microsporidians
FUNGI
amoeboid ancestors
zygote fungi sac fungi club fungi
chytrids
Fig. 22-4, p.353
Fig. 22-5, p.354
Fig. 22-3, p.352
Fig. 22-7, p.355
stalk
The end club-shaped cellbecomes a diploid (2n) zygotewhen its two nuclei fuse.
Club-shaped cells,each dikaryotic (n + n),form at the margins ofmushroom gills.
nuclear fusion meiosis
cytoplasmicfusion
hyphae ofmycelium
Spores are released.
Diploid StageHaploid Stage
spore (n)
gill
After nuclear fusion, the 2n cellundergoes meiosis and bears fourhaploid spores at its tips.
sexual spore (n)at gill margin
After cytoplasmic fusion,new cells of the myceliumhave two nuclei (n + n).Spore-bearing mushroomsform from this mycelium.
Each germinating sporegives rise to a hyphathat grows and becomesa branching mycelium.
cap
Fig. 22-8, p.356
Fig. 22-9, p.357
Fig. 22-10, p.357
Table 22-1, p.359
Fig. 22-12, p.359
Fig. 22-12, p.359