02207naa a2200349 a 450000100080000000500110000800800410001910000230006024500660008326000090014950001070015852011280026565000090139365000230140265000250142565000100145065000120146065300180147265300230149065300290151365300220154265300100156465300310157465300370160570000200164270000260166270000190168870000170170770000170172470000210174177300950176220831662017-12-21       2017    bl uuuu     u00u1 u    #d1 aZANUNCIO, A. J. V.  aCharacterization of eucalyptus clones subject to wind damage.  c2017  aTítulo em português: Caracterização de clones de eucalipto sujeitos a danos provocados pelo vento.  aThe objective of this work was to test a new methodology to assess the resistance of trees to wind damage and determine the characteristics that increase clone resistance to winds. Tree resistance to breakage, basic density, ultrastructure, anatomy, mechanical properties, and wood growth stress have been evaluated in seven Eucalyptus grandis × Eucalyptus urophylla clones, collected from a region with a high incidence of wind damage. The Pearson correlation coefficient between the tree resistance to breakage and the ratio between the area damaged by the winds and the total planted area was -0.839, showing the efficiency of the methodology adopted and that high breaking strength results in a smaller area affected by wind damage. Trees with a high basic density, cell wall fraction, modulus of elasticity of the middle lamella and fibers, fiber hardness, modulus of rupture, growth stress and low microfibril angle and height and width of the rays showed greater resistance to wind damage. Therefore, the selection of clones with these features may reduce the incidence of damage by winds in Eucalyptus plantations.  aWood  aEucalyptus Grandis  aEucalyptus Urophylla  aFibra  aMadeira  aBasic density  aCell wall fraction  aCell wall ultrastructure  aDensidade básica  aFiber  aFração de parede celular  aUltraestrutura da parede celular1 aCARVALHO, A. G.1 aCARNEIRO, A. de C. O.1 aVALENZUELA, P.1 aGACITÚA, W.1 aLEITE, F. P.1 aCOLODETTE, J. L.  tPesquisa Agropecuária Brasileira, Brasília, DFgv. 52, n, 11, p. 968-976, novembro 2017.