In this article we will discuss about the tests that have proven to determine the viability and vigour of pollen after storage in plants. I. Test for Pollen Viability: An assessment of pollen viability is imperative factor in the study of reproductive biology, pollen storage and hybridization. Thus there must be a quick and dependable method to determine the viability [...]
The pollen grains are covered with two concentric wall layers, the outer exine and the inner intine. The stratification of pollen wall is primarily based upon optical microscopy of whole as well as sectioned grains and upon staining reactions of the strata. Recently such stratification is complemented by the biochemical analysis of the various pollen wall layers. The intine is [...]
The following basic properties are known to be essential to make a antigens: 1. Foreign Nature 2. Molecular Size 3. Antigenic Determinants and Cross-Reactivity 4. Molecular Rigidity and Complexity 5. Genetic Factors in the Individual. Property # 1. Foreign Nature: The prerequisite for immunogenicity is that the substance should be foreign to the body of recipient. As a result the [...]