cutting
break
Each one of the fragments continue to grow
Conidiocyst
substratum
Conidium
Germination
Filament
a
Specialized cuttings
Germination
Filament
b
Fig. 7.3 Conidia and cuttings in prokaryotes. (a) Top right: Formation of conidia in a cyanobacterium of the genus Dermocarpa. The
conidiocyst is the cell whose content turned into conidia. Top left:
formation of a non-specialized cutting in a cyanobacterium of the
genus Oscillatoria. (b) Formation and germination of specialized
cuttings in a cyanobacterium of the genus Westiella
Conidiocyst
Conidium
Fig. 7.4 Formation of conidia in
eukaryotes. Formation of haploid
(n) conidia by a haploid
individual (left). Formation of
diploid (2n) conidia by a diploid
individual (right). Open circles:
haploid nuclei (n). Black circles:
diploid nuclei (2n). Conidia give
rise to clones, i.e. individuals
strictly identical (genome,
morphology, ploidy) to the
parents
200
C.-F. Boudouresque