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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Morphology of Equisetum (With Diagram) | Pteridophytes | Botany
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In this article we will discuss about the morphology of equisetum with the help of a suitable diagram. Equisetum, with some 15 or more species, is distributed all over the world except in Australia and New Zealand. It is commonly known as ‘horse-tail’ or ‘scouring rushes’. The most conspicuous features of the plant are jointed […]
Reproduction in Equisetum (With Diagram) | Pteridophytes | Botany
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In this article we will discuss about the process of reproduction in equisetum with the help of diagrams. The cones (Fig. 9.3A) are terminal either on the main shoot as in E. arvense (Fig. 9.1 A, B), or on smaller lateral branches as in E. heymale. At the base of cone is a ring-like structure, […]