caa a22 4500 397520468 CHVBK 20180308164631.0 cr unu---uuuuu 161202e199506 xx s 000 0 eng 10.1093/jxb/46.6.663 doi (NATIONALLICENCE)oxford-10.1093/jxb/46.6.663 Abscisic acid antagonizes the effect of cytokinin on DNA-replication origins [Elektronische Daten] [Annie Jacqmard, Claude Houssa, Georges Bernier] In previous studies (Houssa et al., 1990, 1994) we observed that cytokinins stimulate the cell division process in vegetative and reproductive shoot meristems of monocotyledonous and dicotyledonous species by activating latent DNA-replication origins. Here we report that abscisic acid antagonizes this effect in the shoot meristem of Sinapis alba L. Abscisic acid reduces DNA synthesis by inactivating some DNA-replication origins resulting in a lengthening of the replicon size. It is hypothesized that the balance between abscisic acid and cytokinin levels is one of the major factors controlling the rate of DNA replication, and ultimately the rate of cell division, in shoot meristems. © Oxford University Press Research Papers nationallicence Abscisic acid nationallicence cell division nationallicence cytokinin nationallicence DNA replication nationallicence replicon nationallicence shoot meristem nationallicence Sinapis alba nationallicence Jacqmard Annie Laboratoire de Physiologie Végétale, Département de Botanique, B22, Université de LiÈge, Sart Tilman, B-4000 Liége, Belgium aut Houssa Claude Laboratoire de Physiologie Végétale, Département de Botanique, B22, Université de LiÈge, Sart Tilman, B-4000 Liége, Belgium aut Bernier Georges Laboratoire de Physiologie Végétale, Département de Botanique, B22, Université de LiÈge, Sart Tilman, B-4000 Liége, Belgium aut Journal of Experimental Botany Oxford University Press 46/6(1995-06), 663-666 0022-0957 46:6<663 1995 46 exbotj https://doi.org/10.1093/jxb/46.6.663 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1093/jxb/46.6.663 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Jacqmard Annie Laboratoire de Physiologie Végétale, Département de Botanique, B22, Université de LiÈge, Sart Tilman, B-4000 Liége, Belgium aut NATIONALLICENCE 700 1- Houssa Claude Laboratoire de Physiologie Végétale, Département de Botanique, B22, Université de LiÈge, Sart Tilman, B-4000 Liége, Belgium aut NATIONALLICENCE 700 1- Bernier Georges Laboratoire de Physiologie Végétale, Département de Botanique, B22, Université de LiÈge, Sart Tilman, B-4000 Liége, Belgium aut NATIONALLICENCE 773 0- Journal of Experimental Botany Oxford University Press 46/6(1995-06), 663-666 0022-0957 46:6<663 1995 46 exbotj Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford