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Titolo:
Embryonic ecdysteroids in a mole crab, Emerita asiatica (Milne-Edwards)
Autore:
Subramoniam, T; Tirumalai, R; Gunamalai, V; Hoffmann, KH;
Indirizzi:
IndianIndia Sci, Dept Mol Reprod Dev & Genet, Bangalore 560012, Karnataka,Indian Inst Sci Bangalore Karnataka India 560012 alore 560012, Karnataka, Univ Madras, Dept Zool, Madras 600025, Tamil Nadu, India Univ Madras Madras Tamil Nadu India 600025 dras 600025, Tamil Nadu, India Univ Bayreuth, D-95440 Bayreuth, Germany Univ Bayreuth Bayreuth Germany D-95440 yreuth, D-95440 Bayreuth, Germany
Titolo Testata:
JOURNAL OF BIOSCIENCES
fascicolo: 1, volume: 24, anno: 1999,
pagine: 91 - 96
SICI:
0250-5991(199903)24:1<91:EEIAMC>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
PALAEMON-SERRATUS CRUSTACEA; GRYLLUS-BIMACULATUS DEGEER; FRESH-WATER PRAWN; LOCUSTA-MIGRATORIA; MACROBRACHIUM-ROSENBERGII; OVARIAN DEVELOPMENT; HIRUDO-MEDICINALIS; YOLK PROTEINS; EMBRYOGENESIS; ECDYSONE;
Keywords:
ecdysteroids; embryogenesis; Emerita asiatica;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
40
Recensione:
Indirizzi per estratti:
Indirizzo: Subramoniam, T IndianIndia Sci, Dept Mol Reprod Dev & Genet, Bangalore 560012, Karnataka, Indian Inst Sci Bangalore Karnataka India 560012 arnataka,
Citazione:
T. Subramoniam et al., "Embryonic ecdysteroids in a mole crab, Emerita asiatica (Milne-Edwards)", J BIOSCI, 24(1), 1999, pp. 91-96

Abstract

Using radioimmunoassay (RIA) and high performance liquid chromatography (HPLC), the presence of a complex mixture of free and conjugated ecdysteroidsis reported in the embryonated eggs of a mole crab, Emerita asiatica. Froman initial low value of 6.5 ng/g egg wet weight in stage I, the total ecdysteroids increased in concentration to 15.2 ng/g egg wet weight in stage III. This was followed by a sharp fail in stage IV, but again increased to 15.0 ng/g egg wet weight in stage VI. After a further decline in stage VII, the total ecdysteroids registered the highest value of 36.2 ng/g egg wet weight in stage VIII. This value, however, declined to a low level in the prehatching stage (IX). The concentration of the free ecdysteroids always predominated over the conjugated ones. The HPLC analysis of free ecdysteroids demonstrated the presence of 20-hydroxyecdysone and ecdysone in the ratio of 2.5. Purified lipovitellin II also contained free and conjugated ecdysteroids. The functional significance of the embryonic ecdysteroids as well as their nature of synthesis and storage within the eggs is discussed in the light of the information available on insect embryogenesis.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 07/07/20 alle ore 12:54:52