First half of the 19th century (1 jan 1800 ano – 1 jan 1850 ano)

Descrição:

There was a substantial strengthening of concepts regarding the cellular structure of plants in the first quarter of the nineteenth century, which is connected with significant improvements in the construction of the microscope (in particular, the creation of achromatic lenses). Plant cells have independent barriers, according to Link and Moldnhower. The cell, it turns out, is a morphologically isolated structure. G. Mohl demonstrates in 1831 that even ostensibly non-cellular plant structures, such as aquifers, originate from cells. F. Meyen characterizes plant cells in "Phytotomy" (1830) as "either single, so that each cell is a special individual, as is found in algae and fungus, or, forming more highly organized plants, they merge into more and less significant masses." Meijen highlights the independence of each cell's metabolism. Robert Brown explains the nucleus in 1831, claiming that it is a permanent component of the plant cell.

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