Wood anatomy of Myrcia glomerata (Cambess.) G.P.Burton & E.Lucas (Myrtaceae)
DOI:
https://doi.org/10.5902/2179460X92497Keywords:
Plasticity, Atlantic Forest, MicroscopyAbstract
Myrcia glomerata (Cambess.) G.P. Burton & E. Lucas is a shrub or tree that can reach up to five meters in height, with a generally tortuous trunk and grayish bark. The wood of M. glomerata is moderately heavy and hard. The trunks are mainly used as firewood, charcoal, and for making small items, tool handles, boxes, and crates. A sample of M. glomerata wood was collected on the banks of the Rio do Peixe, in Tangará (SC), and a voucher was deposited into FLOR Herbarium. The anatomical procedures followed the usual techniques in wood anatomy. The main anatomical characteristics observed include growth rings, solitary pores of diffuse arrangement, tangential diameter between 50 and 100 µm and frequency of 5 to 20 vessels/mm²; simple perforation plates and small areolar pits, both ray-vascular and intervascular. It presents vasicentric tracheids with areolar pits. The fibers vary from thin to thick. The axial parenchyma occurs in tangential lines and thick bands, with diffuse arrangement and in aggregates. The rays are numerous (more than 12/mm), predominantly with two cells in width, heterocellular, with procumbent cells and square or erect marginal cells. The anatomy presents typical characteristics described for the family. The unprecedented presence of prismatic crystals and resins in the axial parenchyma is noteworthy, indicating possible environmental adaptations.
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