Observations on the subterranean system of Smilax goyazana (Smilacaceae)
2011
Palhares, D., Botanical Institute of São Paulo, São Paulo, SP (Brazil). Laboratory of Plant Physiology and Biochemistry | Zaidan, L.B.P., Botanical Institute of São Paulo, São Paulo, SP (Brazil). Laboratory of Plant Physiology and Biochemistry
Cuttings from rhizome and root parts were obtained from adult plants of Smilax goyazana A. DC. (Smilacaceae) growing in the cerrado and cultivated in moist sand for three months. Seeds were left to germinate in a germination chamber under constant temperature of 25 deg C and the subterranean system that formed was observed after 10 months of growth. All the cuttings had died by the end of the experiment. The subterranean system was composed of a hard tuberosity derived from the primordial node, which emitted few roots and one or more rhizomes. The rhizomes were sometimes branched; however, they did not emit adventitious roots. The roots were not branched. Thus, according to fractal geometry, the cuttings of this species were difficult to root because they were not sub-units of the adult plant.
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