Glycogen and galactogen in the albumen gland of the freshwater snail Lymnaea stagnalis: Effects of egg laying,photoperiod and starvation |
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| Affiliation: | 1. Unité Biologie des ORganismes et Ecosystèmes Aquatiques (BOREA, UMR 7208), Sorbonne Universités, Muséum National d''Histoire Naturelle, CNRS, Université Pierre et Marie Curie, Université de Caen Normandie, IRD 207, Université des Antilles, CP 26, 43 rue Cuvier, 75005 Paris, France;2. UMR 7245 MNHN/CNRS Molécules de Communication et Adaptation des Micro-organismes, Sorbonne Universités, Muséum National d''Histoire Naturelle, CP 54, 43 rue Cuvier, 75005 Paris, France;3. UMR MONARIS, Sorbonne Universités, de la Molécule aux Nano-objets: Réactivité, Interactions et Spectroscopies, UMR 8233 CNRS-Université Pierre et Marie Curie, 75005 Paris, France;1. Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;3. School of Marine Sciences, Ningbo University, Ningbo 315211, China;1. Department of Chemistry, Payame Noor University, PO BOX 19395-3697, Tehran, Iran;2. Department of Pharmaceutical Chemistry, School of Pharmacy, Shahid Beheshti University of Medical Sciences, Tehran, Iran;3. Pharmaceutical Sciences Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran;4. Departamento de Química Orgánica, Campus de Rabanales, Universidad de Córdoba, Edificio Marie Curie (C-3), Ctra Nnal IV-A, Km 396, E14014 Cordoba, Spain;5. Peoples Friendship University of Russia (RUDN University, 6 Miklukho Maklaya str., 117198, Moscow, Russian Federation |
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| Abstract: | - 1.1. Glycogen and galactogen contents of the albumen gland of the freshwater snail Lymnaea stagnalis were determined under different conditions, known to influence these polysaccharides viz egg laying, photoperiod and starvation.
- 2.2. After oviposition, the galactogen content is restored within 32 hr, whereas glycogen remains constant during this period. Short-day photoperiods favour accumulation, long-day photoperiods induce depletion of glycogen. In contrast, the galactogen content is not affected by the photoperiod.
- 3.3. Since glycogen and galactogen are present in the same cells of the albumen gland, the independent variation of these polysaccharides would imply the presence of separate intracellular regulation mechanisms.
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