jan 1, 1831 - Discovery of Nucleus

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Robert Brown used a microscope to observe the presence of nuclei in plant cells in 1831 while studying milkweed and orchid fertilisation. In a paper presented to the Linnean Society and published in the Transactions in 1833, Brown is credited with being the first to use the word "nucleus." Since he made the majority of his observations in different plant specimens, he initially believed the structure was exclusive to plant cells.

According to him, the nucleus had the appearance of a single circular areola that was conspicuously granular and convex. Brown stated that the nucleus resides in or near the centre of the cell and is more opaque than the cell membrane. He also mentioned that some plants, including Tradescantia Virginiana, had very different nuclei. One of the numerous supporting theories that contribute to understanding cell structure and the basis of cell theory is Brown's initial description of the nucleus. According to cell theory, cells serve as the fundamental structural and organisational building blocks for all living

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