Summary
Seedlings of Sinapis alba were grown under standard conditions. In the hypocotyls and cotyledons DNA synthesis still takes place 36 h after sowing. This synthesis decreases in the following 24 h, but an incorporation of 3H-thymidine was found 108 h after sowing.
Autoradiographic studies demonstrate the incorporation of 3H-thymidine into cell nuclei. While some nuclei are homogeneously labelled, in other nuclei the radioactivity appears preferentially or exclusively in the chromocenters.
A transfer into the dark of plants previously grown in light (for 24 h or 48 h) does not result in an increase of DNA-synthesis again.
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Literatur
Bopp, M.: Hemmung des Streckungswachstums etiolierter Sproßachsen durch FUDR. Z. Pflanzenphysiol. 57, 173–187 (1967a).
—: Internodienstreckung bei dikotylen Pflanzen und DNS-Synthese. Exp. Cell Res. 48, 218–221 (1967b).
—: Über den Einbau von 3H-Thymidin in etiolierenden Sproßachsen. Z. Pflanzenphysiol. 63, 10–14 (1970).
Bopp, M. Capesius, I.: Streckungshemmung durch FUDR bei den Hypokotylen von Sinapis alba. Planta (Berl.) (1970) (im Druck).
Lang, A., Nitsan, I.: Relations among cell growth, DNA-synthesis and gibberellin action. Ann. N.Y. Acad. Sci. 14, 180–190 (1967).
Lima de Faria, A.: DNA-Replication and gene amplification in heterochromatin. Handbook of molecular cytology, ed. Lima de Faria, p. 276–325. Amsterdam, London: North-Holland Publish. Company 1969.
Mohr, H.: Untersuchungen zur Phytochrom-induzierten Photomorphogenese des Senfkeimlings (Sinapis alba L.). Z. Pflanzenphysiol. 54, 63–83 (1966).
Nagl, W.: The mitotic and endomitotic nuclear cycle in Allium carinatum. II. Relations between DNA replication and chromatin structure. Caryologia 23, 71–78 (1970).
Nitsan, I., Lang, A.: DNA-synthesis in the elongating non-dividing cells of the lentil epicotyl and its promotion by gibberellin. Plant Physiol. 41, 965–970 (1966).
Purohit, A. N., Nanda, K. K., Prabha, A.: Effects of some growth substances and antimetabolites on elongation of the first internode in epiphyllous buds of Bryophyllum tubiflorium (Harv.) Bot. Gaz. 130, 102–106 (1969).
Richter, G., Senger, H.: Extraktion und chromatographische Auftrennung der Nucleinsäuren aus Photosynthese-Organismen. Biochim. biophys. Acta (Amst.) 87, 502–505 (1964).
Weidner, M.: Der DNS-Gehalt von Kotyledonen und Hypokotyl des Senfkeimlings (Sinapis alba L.) bei der phytochromgesteuerten Photomorphogenese. Planta (Berl.) 75, 94–98 (1967).
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Capesius, I., Bopp, M. Über die Synthese von DNS in den Keimpflanzen von Sinapis alba L.. Planta 94, 220–228 (1970). https://doi.org/10.1007/BF00386132
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DOI: https://doi.org/10.1007/BF00386132