In this article we will discuss about the process of transition in flowers, explained with the help of suitable diagrams. Reproductive apex exhibits plastochron size fluctuations during the development of floral parts/primordia. The apex may widen and become slightly flattened. In Liriodendron the apex becomes conical and elongated. Smith (1966) reported the horizontal and vertical enlargement of the apex in [...]
In this article we will discuss about the process of androgenesis, explained with the help of suitable diagrams. A. In Vitro Pathways of Androgenesis: The anther or pollen normally starts undergoing in the pathway of androgenesis withÂin 2 weeks and it takes about 5-8 weeks to obtain complete plantlets. Haploid plants are formed in two ways: (i) Direct Androgenesis: Embryos [...]
The following points highlight the two main stages involved in the process of spermatogenesis. The stages are: 1. Formation of Spermatids 2. Spermiogenesis. Spermatogenesis: Stage # 1. Formation of Spermatids: The male germinal cells which produce the sperms are known as the primary germinal cells or primordial cells. The primordial cells pass through following three phases for the formation of [...]