caa a22 4500 475806573 CHVBK 20180406123748.0 cr unu---uuuuu 170329e20000901xx s 000 0 eng 10.1007/BF00986345 doi (NATIONALLICENCE)springer-10.1007/BF00986345 Manen J. Conservatoire et Jardin Botaniques, Université de Genève, Impératrice 1, CH-1292, Chambésy/Genève, Switzerland aut Relaxation of evolutionary constraints in promoters of the plastid gene atp B in a particular Rubiaceae lineage [Elektronische Daten] [J. Manen] In tobacco and spinach, the plastidatpB/E operon, encoding subunits of the chloroplast ATP synthase, is known to have multiple transcription initiation sites. Three different transcripts are initiated from three prokaryotic consensus promoters binding the plastid encoded RNA-poly-merase (PEP). These promoter regions are conserved in a large phylogenetic range, suggesting a functional significance for all of them. One major Rubiaceae lineage in the Rubioideae subfamily, is found to have deleted or altered PEP promoters. An RNA protection essay confirms that this lineage has only one transcript, instead of three, corresponding to the most distal promoter which overlaps with therbcL promoter. The significance of an evolutionary reduction of the complexity of the transcription ofatpB/E is discussed in relation with ecological peculiarities of this Rubiaceae lineage. Springer-Verlag, 2000 ATP nationallicence atp B/E operon nationallicence multiple promoters nationallicence Rubiaceae nationallicence RNA protection nationallicence Plant Systematics and Evolution Springer-Verlag 224/3-4(2000-09-01), 235-241 0378-2697 224:3-4<235 2000 224 606 https://doi.org/10.1007/BF00986345 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00986345 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Manen J. Conservatoire et Jardin Botaniques, Université de Genève, Impératrice 1, CH-1292, Chambésy/Genève, Switzerland aut NATIONALLICENCE 773 0- Plant Systematics and Evolution Springer-Verlag 224/3-4(2000-09-01), 235-241 0378-2697 224:3-4<235 2000 224 606 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer