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CO/FT Regulatory Module Controls Timing of Flowering and Seasonal Growth Cessation in Trees
Henrik Böhlenius,1Tao Huang,1Laurence Charbonnel-Campaa,1Amy M. Brunner,2,4Stefan Jansson,3Steven H. Strauss,4Ove Nilsson1*
Forest trees display a perennial growth behavior characterizedby a multiple-year delay in flowering and, in temperate regions,an annual cycling between growth and dormancy. We show herethat the CO/FT regulatory module, which controls flowering timein response to variations in daylength in annual plants, controlsflowering in aspen trees. Unexpectedly, however, it also controlsthe short-dayinduced growth cessation and bud set occurringin the fall. This regulatory mechanism can explain the ecogeneticvariation in a highly adaptive trait: the critical daylengthfor growth cessation displayed by aspen trees sampled acrossa latitudinal gradient spanning northern Europe.
1 Umeå Plant Science Centre, Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences, S-90183 Umeå, Sweden. 2 Virginia Tech Department of Forestry, Virginia Polytechnic Institute and State University, Blacksburg, VA 240610324, USA. 3 Umeå Plant Science Centre, Department of Plant Physiology, Umeå University, S-90187 Umeå, Sweden. 4 Department of Forest Science, Oregon State University, Corvallis, OR 973315752, USA.
* To whom correspondence should be addressed. Email: Ove.Nilsson{at}genfys.slu.se
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PLANT CELL
19, 2988-3000
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Pea LATE BLOOMER1 Is a GIGANTEA Ortholog with Roles in Photoperiodic Flowering, Deetiolation, and Transcriptional Regulation of Circadian Clock Gene Homologs.
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144, 648-661
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19, 1488-1506
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Plant Physiology
144, 248-257
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From the Cover: The wheat and barley vernalization gene VRN3 is an orthologue of FT.
L. Yan, D. Fu, C. Li, A. Blechl, G. Tranquilli, M. Bonafede, A. Sanchez, M. Valarik, S. Yasuda, and J. Dubcovsky (2006)
PNAS
103, 19581-19586
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J. Song, S. Lu, Z.-Z. Chen, R. Lourenco, and V. L. Chiang (2006)
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47, 1582-1589
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J. A.D. Zeevaart (2006)
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C.-Y. Hsu, Y. Liu, D. S. Luthe, and C. Yuceer (2006)
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18, 1846-1861
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