LM of conjugating filaments of Spirogyra

LM of conjugating filaments of Spirogyra

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Caption: Light micrograph showing conjugating filaments of Spirogyra sp., a green alga which forms slimy threads in stagnant or slow moving water. Conjugation, a form of sexual reproduction, occurs in spring when the threads come together in pairs. Both filaments put out papillae (seen here), which meet to form conjugation tubes. Cytoplasmic mass from the cells of one of the threads (termed male) migrates through the tubes to fuse with the cytoplasm in the (female) cells of the second thread. This produces a zygospore which either germinates at once or lies dormant until the following spring. Magnification: x150 at 35mm size.

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Keywords: alga, algae, algal, botany, conjugation, filamentous algae, green, light micrograph, nature, of algae, plant, sexual reproduction, spirogyra sp.

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