02048naa a2200289 a 450000100080000000500110000800800410001910000180006024500590007826000090013750000980014652011480024465000190139265000130141165300260142465300230145065300310147365300250150465300150152965300200154465300190156465300240158365300270160770000190163470000130165377300920166618762032018-05-09       2010    bl uuuu     u00u1 u    #d1 aSTRECK, N. A.  aMaize leaf development under climate change scenarios.  c2010  aTítulo em português: Desenvolvimento foliar de milho em cenários de mudanças climáticas.  aThe objective of this work was to simulate maize leaf development in climate change scenarios at Santa Maria, RS, Brazil, considering symmetric and asymmetric increases in air temperature. The model of Wang & Engel for leaf appearance rate (LAR), with genotype-specific coefficients for the maize variety BRS Missões, was used to simulate tip and expanded leaf accumulated number from emergence to flag leaf appearance and expansion, for nine emergence dates from August 15 to April 15. LAR model was run for each emergence date in 100-year climate scenarios: current climate, and +1, +2, +3, +4 and +5°C increase in mean air temperature, with symmetric and asymmetric increase in daily minimum and maximum air temperature. Maize crop failure due to frost decreased in elevated temperature scenarios, in the very early and very late emergence dates, indicating a lengthening in the maize growing season in warmer climates. The leaf development period in maize was shorter in elevated temperature scenarios, with greater shortening in asymmetric temperature increases, indicating that warmer nights accelerate vegetative development in maize.  aglobal warming  aZea Mays  aAparecimento de folha  aAquecimento global  aDesenvolvimento vegetativo  aElevated temperature  aFrost risk  aLeaf appearance  aRisco de geada  aTemperatura elevada  aVegetative development1 aLANGNER, J. A.1 aLAGO, I.  tPesquisa Agropecuária Brasileira, Brasília, DFgv. 45, n. 11, p. 1227-1236, nov. 2010