01628naa a2200361 a 450000100080000000500110000800800410001910000120006024501260007226000090019852006520020765000180085965000180087765000180089565000130091365000150092665000150094165000220095665000180097865000190099665000210101565000220103665300160105865300140107465300220108865300080111065300100111865300280112870000180115670000130117470000150118777300640120212786452024-05-21       1989    bl uuuu     u00u1 u    #d1 aSEN, S.  aAbscisic acidba role in shoot enhancement from loblolly pine (Pinus taeda L.) cotyledon explants.h[electronic resource]  c1989  aCotyledon explants were cultured for up to 8 wk on Gresshoff-Doy shoot induction medium supplemented with benzylaminopurine [benzyladenine] and NAA, to which was added ABA at concn. of 10-8, 10-7 or 10-6 M. Best results were obtained with 10-7 M ABA for 4 wk. This treatment doubled the morphogenic area of cotyledons and increased the fresh wt. of cotyledon explants by 40-45%. Comparison of 2 Texas, USA, seed sources showed that response to ABA was related to explant seed source and was not increased by prolonged exposure. Compared to controls, shoot number was increased by 31% and 56% with 2 and 4 wk respectively of exposure to 10-7 M ABA.  aabscisic acid  abenzyladenine  abiotechnology  aconifers  acotyledons  acytokinins  agrowth regulators  aorgan culture  atissue culture  aÁcido Abscisico  aCultura de Tecido  aCotiledones  aExplantes  aGrowth inhibitors  aNAA  aPines  aPlant growth regulators1 aNEWTON, R. J.1 aFONG, F.1 aNEUMAN, P.  tPlant Cell Reports, New Yorkgv. 8, n. 4, p. 191-194, 1989.