What do you mean by Exospore?
What do you mean by Exospore?
: an asexual spore cut off from a parent sporophore by the formation of septa.
What is Endospore and Exospore?
Endospore is the common type of spores produced mainly by bacteria. Exospores are produced in the eukaryotic cells of fungi, algae and cyanobacteria. Endospores are formed inside the mother cell, whereas, exospores are formed towards the end of the mother cell and released as bud.
What does the word Endospore mean?
Endospore – A differentiated cell formed within cells of certain Gram-positive bacteria that are extremely resistant to heat and other harmful conditions and agents. Endopsore are the resting stage during the life cycle of some bacteria, formed in response to adverse conditions.
How are Basidiospores produced?
Basidiospores are produced in the environment by the sexual form of the C. neoformans, Filobasidiella neoformans, or from monokaryotic hyphae that develop under appropriate conditions, in the absence of mating.
How are endospore formed?
Endospore formation is usually triggered by a lack of nutrients, and usually occurs in gram-positive bacteria. In endospore formation, the bacterium divides within its cell wall, and one side then engulfs the other. Endospores enable bacteria to lie dormant for extended periods, even centuries.
What makes endospores unique?
The resilience of an endospore can be explained in part by its unique cellular structure. The outer proteinaceous coat surrounding the spore provides much of the chemical and enzymatic resistance. Beneath the coat resides a very thick layer of specialized peptidoglycan called the cortex.
What is vegetative cell?
Any of the cells of a plant or animal except the reproductive cells; a cell that does not participate in the production of gametes; somatic cells are produced from preexisting cells;.
What do basidiospores infect?
The basidiospores are wind-borne to the alternate host, species of susceptible Berberis and Mahonia, but seldom cause infection more than 180 to 270 m from the source. Most of the infections occur on the upper leaf surface, although infections on the berries, stems, and other plant surfaces do occur.
How are endospores killed?
While resistant to extreme heat and radiation, endospores can be destroyed by burning or by autoclaving. Endospores are able to survive boiling at 100°C for hours, although the longer the number of hours the fewer that will survive. This may be triggered by heating the endospore.
Can spores be killed?
A process called sterilization destroys spores and bacteria. It is done at high temperature and under high pressure. In health care settings, sterilization of instruments is usually done using a device called an autoclave.