It is the phenomena of the spore formation by the vegetative cells. The life cycle of spores involves the following three events: Central core consists of structural components mainly DNA, RNA (small amount), 40% dipiclonic acid (DPA) etc.Germ wall protects the central core of spores from the potentially damaging chemicals.Its primary function is to protect against dehydration and high temperature. Cortex is the region that lies between the inner and outer coat and is made up of peptidoglycan.The outer and inner coating is made up of proteins, and its main function is to provide resistance against the chemical and enzymatic actions to the spores.It consists of the following structural components, which you can see in the diagram that is given below. Endospores are the spores that form within or inside the vegetative cell, while exospores are the spores that form outside the vegetative cell. Spores are broadly classified into two types, namely endospore and exospore based on their position. Spores form new individuals through mitotic cell division once they germinate. In its dormant state, the spores are highly resistant to adverse conditions.
Thus, the spores are generally haploid cells that are produced by meiosis. It provides the asexual means of reproduction, in which the spores do not need to fuse, unlike gametes. Spores can be defined as the reproductive structures, which are usually single-celled. In this context, we will discuss the different cytological events or life cycle of a spore along with its definition, types and structural components. Spores disperse through the wind or air current. These are the reproductive structures that form in the life cycle of many plants, fungi, bacteria etc.
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