caa a22 4500 445840943 CHVBK 20180317145344.0 cr unu---uuuuu 170323e20110501xx s 000 0 eng 10.1007/s10725-010-9535-0 doi (NATIONALLICENCE)springer-10.1007/s10725-010-9535-0 Effect of environment and shoot architecture on floral transition and gene expression in Eucalyptus occidentalis and Metrosideros excelsa [Elektronische Daten] [Elizabeth Jaya, Jiancheng Song, John Clemens, Paula Jameson] Metrosiderosexcelsa and Eucalyptus occidentalis exhibit different strategies prior to flowering—the former passes through a long juvenile phase and must acquire a degree of architectural complexity to flower, whereas the latter flowers precociously even on stems still exhibiting juvenile foliage. As expediting flowering is of interest to breeders and horticulturalists alike we compared these species by growing plants with two branch architecture treatments in factorial combination with two growth environments. Plants were either allowed to branch freely or constrained to a single stem before subsequently being allowed to branch; one environment was inductive for flowering and the other not. Three meristem identity genes (the equivalents of LEAFY, APETALA1 and TERMINAL FLOWER1) were used as indicators of flowering. Constraining E. occidentalis plants to a single stem delayed the onset of the main flush of flowering in contrast to M. excelsa, although in both species a complex interaction between branching and environment occurred. We show that the complexity of the architecture can impact on production of flowers and can be used to expedite or enhance flowering for breeding purposes, but this is dependent on the species. AP1 appears to be a useful marker not just for floral organ differentiation but also as an indicator of floral induction having occurred. Springer Science+Business Media B.V., 2010 APETALA1 nationallicence LEAFY nationallicence Meristem identity genes nationallicence Myrtaceae nationallicence Photoperiod nationallicence qRT-PCR nationallicence TERMINAL FLOWER1 nationallicence Jaya Elizabeth Institute of Molecular BioSciences, Massey University, Private Bag, 11222, Palmerston North, New Zealand aut Song Jiancheng School of Biological Sciences, University of Canterbury, Private Bag, 4800, Christchurch, New Zealand aut Clemens John Institute of Molecular BioSciences, Massey University, Private Bag, 11222, Palmerston North, New Zealand aut Jameson Paula School of Biological Sciences, University of Canterbury, Private Bag, 4800, Christchurch, New Zealand aut Plant Growth Regulation Springer Netherlands 64/1(2011-05-01), 53-61 0167-6903 64:1<53 2011 64 10725 https://doi.org/10.1007/s10725-010-9535-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10725-010-9535-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Jaya Elizabeth Institute of Molecular BioSciences, Massey University, Private Bag, 11222, Palmerston North, New Zealand aut NATIONALLICENCE 700 1- Song Jiancheng School of Biological Sciences, University of Canterbury, Private Bag, 4800, Christchurch, New Zealand aut NATIONALLICENCE 700 1- Clemens John Institute of Molecular BioSciences, Massey University, Private Bag, 11222, Palmerston North, New Zealand aut NATIONALLICENCE 700 1- Jameson Paula School of Biological Sciences, University of Canterbury, Private Bag, 4800, Christchurch, New Zealand aut NATIONALLICENCE 773 0- Plant Growth Regulation Springer Netherlands 64/1(2011-05-01), 53-61 0167-6903 64:1<53 2011 64 10725 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer