Light and electron microscopy of chloroplasts in Equisteum gametophytes Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/kw52jc14j

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  • Spores of Equisetum were germinated and the resulting gametophytes grown to maturity in standard microcultures. Light and electron microscope observations were made of the chloroplasts within the gametophytes. These chloroplasts were found to be oval to dumb-bell shaped organelles possessing organized grana. By means of time-lapse movies they were shown to replicate by fission within the meristematic cells of the thalli. Plastid divisions were most often found in cells which had just divided. Plastid division required from eight to 30 hours. No proplastids were seen in the developing gametophytes. The plastids became degenerate in the rhizoids and in the developing sperm.
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