The upcoming discussion will update you about the differences between pollen and spore. Difference # Pollen: 1. It is a container that houses male gametophyte of phanerogams. 2. The target of a pollen grain after transportation is stigma. 3. A pollen grain can perform its function when it reaches on a compatible stigma. 4. Aperturate pollen grains are colpate/porate etc. [...]
In this article we will discuss about the composition and importance of exince in pollen and spore walls. Composition of Exine: Exine is mainly composed of sporopollenin. Apart from sporopollenin glycoproteins are present in the chambers formed by bacula in tectate pollen. It is important in pollen-stigma interaction. The presence of glycocalyces (sing, glycocalyx) is reported from exine. Glycocalyx forms [...]
In this article we will discuss about the size of pollen and spore walls. Size: There exist much variations in sizes of pollen and spores. The size may be 5 µ × 2.4 µ as observed in pollen of forget-me-not (Myosotis) or as high as 200 µ or more as is noted in certain genera of Cucurbitaceae and Nyctaginaceae etc. [...]