Abstract
The influence of gamma radiation on the rate of cell division and the amount of chlorophyll a per cell was studied for Dunaliella bioculata Butcher, 1959 cultures. A decrease in the cell-division rate and an increase of chlorophyll a per cell were observed.
Résumé
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1.
Des cultures de Dunaliella bioculata Butcher, 1959 ont été soumises à différentes doses d'irradiation γ (2, 4, 6, 8, 16, 32, 64, 128 milliers de rads).
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2.
Les doses égales ou supérieures à 10000 rads entraînent la destruction des cellules dans les 24 h qui suivent l'irradiation. Les doses inférieures provoquent l'arrêt ou le ralentissement des divisions cellulaires.
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3.
La teneur en chlorophylle a/l de suspension irradiée est toujours inférieure à celle des suspensions témoins non irradiées.
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4.
La quantité de chlorophylle a par cellule est par contre supérieure pour les algues irradiées et d'autant plus que la dose d'irradiation augmente (2000 à 800 rads).
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5.
L'augmentation du taux de chlorophylle a par cellule, étroitement liée à la dose de rayonnement, apparrît très clairement après les 24 h qui suivent l'irradiation.
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Communicated by J.M. Peres, Marseille
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Saraiva, M.C. Effet de l'irradiation gamma (cobalt 60) sur les cultures d'une chlorophycée, Dunaliella bioculata . Marine Biology 15, 74–80 (1972). https://doi.org/10.1007/BF00347438
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DOI: https://doi.org/10.1007/BF00347438