A number of factors are found to favour apogamous response in ferns. Some of the factors are: 1. Carbohydrate Nutrition 2. Mineral Nutrition 3. Gene Dosage 4. Light Quality 5. Hormones. Factor # 1. Carbohydrate Nutrition: Dark grown cultures of P. aquilinum do not form apogamous sporophytes even in the presence of sucrose. The increased […]
Factors Regulating Apogamy in Pteridophytes | Botany
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Anatomy of Gnetum (With Diagram) | Gymnosperms | Botany
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In this article we will discuss about the anatomy of gnetum with the help of a suitable diagram. The root of Gnetum has diarch xylem, the endodermis bounds the multi-layered pericycle. The cortex of parenchymatous cells is filled with starch; the thick-walled fibres are also common in cortex. Tracheids have uni-seriate, bordered pits with conspicuous […]
Reproduction and Development in Ephedra (With Diagram) | Botany
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In this article we will discuss about the process of reproduction and development in ephedra with the help of diagrams. Reproduction in Ephedra: In dioecious Ephedra, male and female cones are borne in the axils of determinate shoots. These may be solitary but most are arranged as dichasial cymes. Male cone of E.foliata consists of […]