Heterocysts are specialized cells found in blue-green algae, capable of fixing nitrogen from the air. These cells are formed in…
Psilotum is an epiphytic pteridophyte seen on the base of dead and decaying tree trunks as well as on rock…
The important edaphic factors that affect the growth of plants and vegetation in general are, Soil moisture Soil reactions Soil…
Nowadays there is a growing importance for the discovery of biodynamic agents from marine sources and drugs from marine sources.…
Resins are complex, amorphous, and somewhat semisolid substances that would melt on heating. These are secreted by schizogenous or schizolysigenous…
Tannins are non-nitrogenous organic compounds with astringent properties. They are a large group of compounds with a wider distribution in…
Adulteration is the intentional or unintentional substitution of original crude drugs, fully or partially with substances of inferior quality that…
The name ‘stele’ has been derived from a Greek word meaning ‘Pillar’. It refers to the different parts of the…
Telome theory by Zimmermann is an important part of the research on the evolution of sporophytes in pteridophytes. It was…
What are Epidermal Cells? Epidermal cells are derived from the dermatogen of the apical meristem. It is the outer layer…
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