Seed germination and removal of michelia champaca L. (Magnoliaceae) in eucalypt stands: the influence of the aril
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Universidade Federal de Viçosa
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We tested the influence of the aril on seed germination in controlled conditions and on theremoval of M. champaca seeds in natural environment. Germination assays were kept at 25 ± 2 °C undercontinuous white light. Removal experiments were carried out in three old (39 to 62-years old) and three new (15-years old) eucalypt stands in Horto Florestal Navarro de Andrade, Rio Claro, SP. The results showthat the aril inhibits the germination and the seeds exhibit a positively photoblastic reaction. We found higherseed removal in old eucalypt stands than the new ones, probably due to the higher density of rodents in theold stands. In the new stands, we found higher seed removal of arillated seeds by ants. Ants are importantto remove the aril of seeds dropped by birds, not only enhancing seed germination but also preventing seedpredation by rodents
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