EFFECTS OF LOCALIZED UV IRRADIATION ON INCORPORATION OF ADENINE-8-C$sup 14$, URIDINE-H$sup 3$, AND DL-METHIONINE-S$sup 35$ INTO PROTEINS OF ACETA-BULARIA MEDITERRANEA (in French)
The effects of localized uv radiation (tip or rhizoid) on cap formation and incorporation of labeled precursors (adenine-8-C/sup 14/, uridine-H/sup 3/, and DL-methionine-S/sup 35/) into RNA and proteins were followed in Acetabularia. It was found that the three precursors studied are incorporated first in the nucleus and that they are then distributed according to a decreasing apico-basal gradient in normal algae. After uv irradiation of the tip, cap production and incorporation of the precursors in the apical region are markedly decreased. Irradiation of the rhizoid has less effect on cap formation and markedly reduces the incor poration, but without modifying the apico-basal gradient. It is concluded that the nucleus controls the synthesis of RNA and suifur-containing proteins, which accumulate in the apical part of the alga where they play an important role in morphogenesis. (auth)
- Research Organization:
- Universite libre, Brussels
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-15-029020
- OSTI ID:
- 4837856
- Journal Information:
- Exptl. Cell Research, Vol. Vol: 24; Other Information: Orig. Receipt Date: 31-DEC-61
- Country of Publication:
- Country unknown/Code not available
- Language:
- French
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