C-Fern Lab

C-Fern Lab - spore was shaped like a mitt and more resembles the sporophyte rather than the gameophyte stage it was in the previous week The

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Sarah Blackburn Observational Write-Up: Life Cycle of Certaopteris Ferns In the course of the past five weeks, a single, male spore of Ceratopteris Fern has grown into a young sporophyte. Weekly, photographs were taken and observations were made of the progress and growth of the spore. During week 1, the male spores were in close proximity and dark green or grayish in color. The spore seems to be divided into three parts and has a pattern with shapes that look like cilinders. They are difficult the see from the photographs and do not yet resemble a gametophyte. By week 2 the spores had become translucent and germinated, sprouting the beginning stages of roots, or rhizoids, which look like small hairs emerging from the old spore. The chloroplast, which is comprised of small circles connected to each other was visible and the spore wall had ruptured. During week 3, the male gametophyte could be identified. The spore had become larger and the rhizoids shorter and looked more like roots. The
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Unformatted text preview: spore was shaped like a mitt and more resembles the sporophyte rather than the gameophyte stage it was in the previous week. The pattern observed in the first week was still previlent, the cilindrical shapes being a darker green than the body of the spore. By the fourth week the fertilized archegonia are visible. The original spore can be seen and has grown to a larger size, as well as the developing sporophyte which still maintains the same original pattern and is significantly larger than the remnents of the original spore. The rhizoids have grown in length and number, appearing stronger and more like roots. During week 5, a young sporophyte had developed. The old gametophyte could still be indentified with the sporophyte around it. The shape of the sporophyte roughly resembled a clover. The rhizoids did not appear as long because the size of the spore had increased. The original pattern was less prominent, but the color was consitent. WEEK ONE WEEK TWO WEEK 3 WEEK 4 WEEK 5...
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This note was uploaded on 10/02/2008 for the course BIOL BIOL 9L taught by Professor Koepf during the Spring '08 term at Drew.

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C-Fern Lab - spore was shaped like a mitt and more resembles the sporophyte rather than the gameophyte stage it was in the previous week The

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