In this article we will discuss about the events in pollen-pistil interaction with its significance. Pollen-Pistil Interaction: Pollen grains are deposited on the stigma either due to closeness of the anthers to the stigma or by pollinating agents (biotic or abiotic). This unique feature brings about pollen-pistil interaction between the male gametophyte, the pollen grains, with the massive sporophytic tissue. [...]
In this article we will discuss about:- 1. Morphology of Orbicules 2. Development of Orbicules 3. Functions. Ubisch bodies were first discovered by Rosanoff (1865) in close association with the tapetum. Kosmath (1927) suggested that these bodies should be called "Ubisch granules" while Erdtman (1961) proposed the term "orbicules". Morphology of Orbicules: Orbicules are small and generally spherical structures (2-5 [...]
Morphological characteristics of pollen grains have been categorised into different groups: 1. Pollen Units 2. Polarity 3. Symmetry 4. Shape 5. Size 6. Apertures 7. Sub-Divisions of the Pollen Surface 8. Sporoderm Stratification 9. Exine Ornamentation 10. 'LO' Analysis. Characteristic # 1. Pollen Units: The pollen grains are produced within the anther of the flower. Pollen mother cells originate from [...]