Introduction :
▪ August Wilhelm Eichler (1839 – 2 March 1887) was a German botanist.
▪ In 1865, Eichler start his work at the Royal Herbarium in Berlin, on Plant morphology and classification.
▪ "Blüthendiagramme" (1875) which proposed a standardized system for representing the structure of flowers, and "Blüthensekunde" (1878 and 1883) which focused on the organs and structures of flowers in detail.
▪ "Sympetale Blüthendiagramme" (1883) This work focused on the sympetalous flowering plants, which are plants in which the petals are fused together into a single structure.
▪ He contributes to plant anatomy, embryology, and paleobotany. He also develop the "Eichlerian system" of classification.
Phylogenetic trend in Plant classification :
▪ Phylogenetic trend refers to the evolutionary connection between different groups of Organisms - how they are related in terms of their origin and development.
▪ It can be studied in a number of ways, including observation of the fossil record or by analyzing the structural, genetic, and molecular characteristics of organisms. By examining the similarities and differences between organisms at a molecular level.
▪ Phylogenetic system was based on dividing the plant kingdom into plants with concealed reproductive organs such as Cryptogamae (hidden reproduction) and Phanerogamae
Phylogenetic Trend in Plant classification :
▪ Phylogenetic trend refers to the evolutionary connection between different groups of organisms - how they are related in terms of their origin and development.
▪ It can be studied in a number of ways, including observation of the fossil record or by analyzing the structural, genetic, and molecular characteristics of organisms. By examining the similarities and differences between organisms at a molecular level.
▪ Phylogenetic system was based on dividing the plant kingdom into plants with concealed reproductive organs such as Cryptogamae (hidden reproduction) and Phanerogamae (visible reproduction).
▪ By understanding the evolutionary relationships between different groups of organisms, we can create more accurate and meaningful systematics.visible reproduction).
▪ By understanding the evolutionary relationships between different groups of organisms, we can create more accurate and meaningful systematics.
Contribution :
▪ Floral Morphology: Most influential contributions was his work on the structure and classification of flowers. He developed a system for showing the structure of flowers that is still used today, known as the "Eichlerian diagram.“
▪ Classification of plants: He proposed “Eichlerian system of classification” which grouped plants based on their morphological characteristics.He also played an important role in the field of paleobotany, which involves the study of fossil plants.
▪ Plant anatomy: Eichler made significant contributions to the understanding of plant anatomy, publishing research on embryology, fruit development.
▪ Paleobotany: Eichler also studythrancient plants, and helped to build one of the world's most comprehensive collections of fossil plant specimens while working at the Museum of Berlin
Disadvantages Of Phylogenetic Trend :
▪ In phylogenetic classification, closely related species do not always appear to be overly
uniform.
▪ While the groups that are not closely related but evolved under similar conditions may look more similar to each other.
▪ Knowing the evolutionary history of all the species is not possible.
