In this article we will discuss about the process of reproduction in porella with the help of diagrams. Porella (Fig. 2.11 A, B) is dioecious and dimorphic. Male plants are smaller than female plants. The antheridia occur on small lateral branches (Fig. 2.11C) which are almost perpendicular to the main axis. Although the female plants […]
Reproduction in Porella (With Diagram) | Bryophytes | Botany
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Heterospory in Selaginella | Pteridophytes | Botany
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The production of two kinds of spores differing in structure and function, the smaller one producing the male gametophyte and larger one producing the female gametophyte, is termed heterospory. For the first time distinct heterospory (structural as well as functional) is evident in pteridophytes; but out of several hundred forms in the group, only 9 […]
Control of Root and Shoot in Selaginella | Pteridophytes | Botany
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The shoots in Selaginella are characterized by the possession of meristems (dorsal and ventral) at each branching. These angle-meristems produce roots. In contemporary literature these outgrowths are designated as ‘rhizophore’. However, studies of auxin transport in these structures have conclusively proved their nature as root. Employing labelled auxin (C IAA), it is shown that auxin […]