Life Cycle of Plasmodial Slime molds Simple Step Wise Explanation

What are Slime molds?

Slime moulds are ‘fungus like protists’. This group is further classified into “cellular” and “acellular” slime molds. Slime molds exhibit characteristics of both fungus and protozoans. Both grow in moist soil or decaying plant matter often white, yellow, or red in color.

What are plasmodial Slime molds?

In plasmodial slime molds, vegetative state is multi nucleate, diploid, amoeboid coenocytic mass called plasmodium.

Lets divide the life cycle into simple steps for better understanding

Steps in Life cycle of plasmodial Slime mould

Life Cycle of Plasmodial Slime molds Simple Step Wise Explanation

Step 1: large multinucelate diploid cell that glides along engulfing food particles including microorganisms such as bacteria

Step 2: On maturity, plasmodium has a net like appearance

Step 3: Formation of sporangia

Sporangia arise from the basal net like plasmodial mass. Sporangia consist of a stalk and head region. Many diploid nucleus moves to the head region.

Step 4: Diploid (2n) nucleus undergoes meiosis forming haploid (1n) spores. Spores are thick walled and highly resistant to extreme environment.  It can act like a resting spore.

Step 5: Spore Germination on return of favorable condition

Depending on the environment; spore can geminate in two ways

Step 5 a: forming swarm cells when there is enough moisture. These are biflagellated motile cells.

Step 5 b: or amoeboid cell formation in dry condition

Step 6: fusion of pair of Amoeboid cell /or swarm cell (withdraws flagella at the time of fusion)

Step 7: The resulting diploid zygote undergoes mitosis to form multinucleate plasmodium. It later forms a large super cell with many diploid nuclei.

Post a Comment

Previous Post Next Post