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 [...]
In this article we will discuss about the role of proteins in pollen grains. T. Singer and Petrovskya - Baranova (1961) were the first to show the existence of proteins with enzymatic properties in certain layers of the pollen walls of Paeonia and Amaryllis. Subsequently, Makinen and McDonald (1968) demonstrated the pollen enzymes and isoenzymes in flowering plants. The details [...]