alb10672608

LM of conjugating filaments of Spirogyra

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 which meet to form conjugation tubes (seen here). 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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Titre: LM of conjugating filaments of Spirogyra

Légende: Voir la traduction automatique
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 which meet to form conjugation tubes (seen here). 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.

Crédit: Album / Science Source / M.I. WALKER

Autorisations: ? Autorisation de modèle: Non - ? Autorisation de propriété: Non
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Taille de l'image: 5117 × 3463 px | 50.7 MB

Taille d'impression: 43.3 × 29.3 cm | 2014.6 × 1363.4 in (300 dpi)

Mots clés: BOTANIQUE • REPRODUCTION