Asci of Morchella sp. (×400) (Cheuk_KinHang)
Updated on 05/12/2022
Other Photos of Topic Ascomycetes
Description
Location
Microscope slide
Comments
Tag
Popular Tag
petal
,
sepal
,
pileus
,
suspensor
,
epidermis
,
stipe
,
Labellum
,
columella
,
sporangium
,
sporangiophore
Popular Tag
petal
, sepal
, pileus
, suspensor
, epidermis
, stipe
, Labellum
, columella
, sporangium
, sporangiophore
This photo can help illustrate the sexual reproduction of this Morchella sp. We can see that each ascus is having 8 ascospores. And the ascoscpores are actually haploid.
The nuclei from the dikaryotic ascus (n+n) will first have karyogamy (nuclear fusion) to form diploid nucleus (2n), then it will further undergo meiosis to form 4 haploid nuclei (n), the 4 haploid nuclei will further undergo mitosis, and each nucleus is carried by each of the ascospores formed eventually. At the end, 8 ascospore will be formed and they are all haploid (n)
It would be better for the students to put a box to encircle the structure for other students to have better observation.
Here leave a question for students : Plasmogamy of ascomycetes is resulted from the fusion of two different structure from mycelia with different mating type, can you name those two structure?