01880naa a2200301 a 450000100080000000500110000800800410001910000180006024501760007826000090025452009640026365000170122765000140124465000190125865000270127765000220130465000230132665000220134965300160137165300170138765300110140465300140141565300190142965300280144870000180147670000200149477300640151412786662024-05-22       1989    bl uuuu     u00u1 u    #d1 aWARRAG, E. I.  aComparative greenhouse study of Eucalyptus grandis in vitro plantlets and half-sib seedlings, II. Dry matter accumulation and relative distribution.h[electronic resource]  c1989  aIn vitro directly micropropagated plantlets from three selected five-year-old E. grandis hybrids were compared to their related half-sib seedlings for growth and growth pattern parameters under greenhouse conditions used for operational seedling production. The oven dry weights were determined from stem, leaf, and root samples collected 4 times at 40 day intervals. Relative growth rate, net assimilation rates and shoot : root ratio were calculated. Survival was 98% and 95% for plantlets and seedlings respectively. Significant differences were observed between parents in terms of shoot and root dry weights and their ratios with similar ranking among plantlets and seedlings, suggesting genetic control over these traits. Plantlets started with significantly higher root : shoot ratios and stem, root and total dry weight. Although seedlings had higher relative growth and net assimilation rates, all the initial differences decreased sharply over time.  aforest trees  aseedlings  atissue culture  avegetative propagation  aCultura de Tecido  aEucalyptus Grandis  aMicropropagação  aBroadleaves  aDistribuicao  aGrowth  aPeso seco  aPlanting stock  aPlantula micropropagada1 aLESNEY, M. S.1 aROCKWOOD, D. L.  tPlant Cell Reports, New Yorkgv. 8, n. 8, p. 500-503, 1989.