01686naa a2200229 a 450000100080000000500110000800800410001902400390006010000180009924501290011726000090024652010010025565000150125665000110127165000290128265000190131165000120133070000180134270000210136070000180138177300570139919397742015-02-20       2012    bl uuuu     u00u1 u    #d7 aDOI 10.1007/s10310-011-0314-12DOI1 aBRAINE, J. W.  aAllelopathic effects of Araucaria angustifolia needle extracts in the growth of Lactuca sativa seeds.h[electronic resource]  c2012  aAraucaria forest, named due to the high abundance of Araucaria angustifolia, occurs mainly in the southern Brazilian highlands, and the abundance of A. angustifolia in the forest is a current forest issue. The present study aimed at evaluating a potential allelopathic effect of A. angustifolia needle extracts that could mediate plant successional dynamics in the Araucaria forests. Senescent araucaria needles from A. angustifolia were evaluated for their allelopathic potential on Lactuca sativa through an in vitro study. The effect was evaluated by determining the germination of seeds, length of seedling and germination rate. The allelopathic potential of the A. angustifolia was confirmed for the highest doses tested (187.5 and 250 mg of the extracts). The potential allelochemical compounds identified were ent-kaurene and phyllocladene. In conclusion, A. angustifolia showed a potential allelophatic effect that may play an important role in successional dynamics of Araucaria forests.  aAlelopatia  aAlface  aAraucária Angustifólia  aLactuca Sativa  aSemente1 aCURCIO, G. R.1 aWACHOWICZ, C. M.1 aHANSEL, F. A.  tJournal of Forest Researchgv. 17, p. 440-445, 2012.