LO-analysis is a means to elucidate the details of sexine pattern on the basis of light microscopic observations of a pollen grain and spore at different adjustments of the microscope. The ultra thin section (0.1-0.5 micron thick) and optical section of a pollen grain provide details of sexine. The term optical section refers to the view of a pollen grain [...]
In this article we will discuss about the aperture found in the pollen and spore wall of plants. It is a weak, preformed locus on the exine of spore and pollen through which the intra-exinous substance exits and pollen tube emerges during pollen germination. Apertures may be absent from a pollen grain or spore when they are termed as inaperturate/atreme/non-aperturate [...]
In this article we will discuss about:- 1. Distribution and Arrangement of Fibre 2. Shape, Structure and Content of Fibre 3. Types 4. Functions 5. Sources and Uses. Fibre is narrow, elongated cell with thick lignified wall and narrow lumen tapering to a wedge-shape at both ends. Distribution and Arrangement of Fibre: Fibre occurs in the ground and vascular tissues [...]