By sharing this link, I acknowledge that I have read and understand the Terms and Conditions.
54.2 MB (10.9 MB compressed)
5343 x 3543 pixels
45.2 x 30.0 cm ⏐ 17.8 x 11.8 in (300dpi)
ASTRID & HANNS-FRIEDER MICHLER / SCIENCE PHOTO LIBRARY ASTRID & HANNS-FRIEDER MICHLER / SCIENCE PHOTO LIBRARY
Light micrograph showing conjugating filaments of Spirogyra sp. , a green alga which forms slimy threads in stagnant or slow moving water. Spiro- gyra is so called because of spiral chloroplasts (green) found within each cell. Conjugation, a form of sexual reproduction, occurs in spring when threads come together in pairs. Both filaments put out papillae which meet to form conjugation tubes. Cytoplasm from the cells of one of the threads (termed male) migrates through the tubes to fuse with the cytoplasm in (female) cells of the other thread. Zygospores produced lie dormant until the next spring. Magnification: x30 at 35mm size.
Model release not required. Property release not required.