Chemical and structural characterization of the bark of Albizia niopoides trees from the Amazon

Bark characterization of Tachigali guianensis and Tachigali glauca from the Amazon under a valorization perspective

“…2B and 2C). This result also aligns with barks of other tropical species, such as Albizia niopoides (14.5% total extractives and 12.2% polar extractives) (Carmo et al 2016a), Copaifera langsdorffii (21.3% and 19.2%) (Carmo et al 2016b), Goupia glabra (22.5% and 21.8%) (Carmo et al 2016c), Tectona grandis (10.7% and 9.0%) (Baptista et al 2013), E. urophylla × E. grandis and E. urophylla × E. camaldulensis (14.3% to 17.6%, and 12.0% to 16%) (Sartori et al 2016), Quercus laurina (19.3% with 12.7% ethanol solubles) and Quercus crassifolia (outer bark) (12.7% with 4.3% ethanol extract) (Ruiz-Aquino et al 2015), and Anadenanthera peregrina and Anadenanthera colubrina (28.8% and 28.9% with 25.7% and 26.6% polar extractives) (Mota et al 2017). Waxes and other non-polar compounds that are soluble in dichloromethane composed the remaining bark extractives, representing only approximately 8.1% of the total extractives in T. guianensis bark and 7.0% in T. glauca bark.…”

“…1B and 3A). Rings of sclerified cells occur in different species of Caesalpinioideae and Mimosaceae (Roth 1981;Carmo et al 2016a;Mota et al 2017). The phloem thicknesses were 2.32 mm ± 0.98 mm and 1.59 mm ± 0.38 in T. guianensis and T. glauca, respectively, with a more or less gradual transition from conducting phloem to nonconducting phloem.…”

“…rubiginosum, S. paniculatum var. subvelutinum, Acacia polyphylla, Copaifera langsdorffii, Mimosa laticifera (Costa et al 1997), Schizolobium parahyba (Marcati et al 2008), Albizia niopoides (Carmo et al 2016a), Anadenanthera peregrina, and A. colubrina (Mota et al 2017).…”

“…Therefore, only barks with a substantial proportion of cork have a high content of suberin, e.g., Quercus cerris (28.5%) (Şen et al 2010), Betula pendula (5.9%) (Miranda et al 2013), Q. laurina (26.6%) and Q. crassifolia (20.1%) (Ruiz-Aquino et al 2015), and Pseudotsuga menziesii (26.8%) (Ferreira et al 2015). In barks with little development of cork, the suberin content is therefore low, as in Tectona grandis (1.9%) (Baptista et al 2013), A. niopoides (0.8%) (Carmo et al 2016a), G. glabra (1.1%) (Carmo et al 2016c), A. peregrina and A. colubrina (2.4% and 2.6%) (Mota et al 2017), and Eucalyptus species (Miranda et al 2013) The T. guianensis and T. glauca barks showed similar degrees of lignification (27% and 28%, respectively). They had lower lignin contents in comparison to other barks from tropical species such as A. niopoides (37.1%) (Carmo et al 2016a), G. glabra (43.8%) (Carmo et al 2016c), Q. laurina andQ.…”

“…In barks with little development of cork, the suberin content is therefore low, as in Tectona grandis (1.9%) (Baptista et al 2013), A. niopoides (0.8%) (Carmo et al 2016a), G. glabra (1.1%) (Carmo et al 2016c), A. peregrina and A. colubrina (2.4% and 2.6%) (Mota et al 2017), and Eucalyptus species (Miranda et al 2013) The T. guianensis and T. glauca barks showed similar degrees of lignification (27% and 28%, respectively). They had lower lignin contents in comparison to other barks from tropical species such as A. niopoides (37.1%) (Carmo et al 2016a), G. glabra (43.8%) (Carmo et al 2016c), Q. laurina andQ. crassifolia (36.9% and39.6%) (Ruiz-Aquino et al 2015), but were similar to barks of A. peregrina and A. colubrina (18.8% and 18.9%) (Mota et al 2017) and of six Eucalyptus urophylla hybrids (18.1% to 21.2%) (Sartori et al 2016) The contents and compositions of polysaccharides of the barks of both species were similar (38.4% and 38.6% of the bark, respectively, for T. guianensis and T. glauca) (Table 2).…”