Madeiras do Município de Aripuanã e suas utilidades (Mato Grosso)

Loureiro, Arthur A.; Lisbôa, Pedro Luiz Braga

doi:10.1590/1809-43921979091s005

Cited by 11 publications

(5 citation statements)

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“…In addition, eight primary forest grown Swietenia and Cedrela trees were collected from the "Reserva Rio Branco" 50 km west of the city (comp. Loureiro & Lisboa 1979). The experimental area is located approximately 190 m above sea-level with an annual precipitation of approximately 3,000 mm (wettest months February and March, driest months September and October) and a mean temperature of 24.9 °C.…”

Section: Study Sites and Tree Selectionmentioning

confidence: 99%

Formation of Increment Zones and Intraannual Growth Dynamics in the Xylem of Swietenia Macrophylla, Carapa Guianensis, and Cedrela Odorata (Meliaceae)

Dünisch¹,

Bauch²,

Gasparotto³

2002

IAWA J

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The pattern of growth increment zones, the cambial growth dynamics and the structural variation in wood formation of Swietenia macrophylla King, Carapa guianensis Aubl., and Cedrela odorata L. (Meliaceae) were investigated in order to understand the relationship of site conditions and sustainable growth in Central Amazonian plantations. Trees were available from 8-, 17-, 23-, and 57-year-old plantations, and from primary forests in Manaus (Amazônia), Santarem (Pará), and Aripuanã (Mato Grosso). The wood anatomical structure and the annual increments of 61 Swietenia, 94 Carapa, and 89 Cedrela trees were studied for different tree heights. The curves of annual increments were cross-dated and tested for synchronisation. The cambial growth dynamics of up to 52 trees per species were dated by means of dendrometer measurements, monthly labelling by pinmarkers, and extracted cambium samples investigated using a microscope. The intraannual course of the growth and structural variation was compared with the water supply of the soil and insect attacks (Hypsipyla grandella (Zeller) Lep.).In Swietenia and Carapa parenchyma and vessel bands as well as bands of resin canals were observed. Within the xylem of Cedrela, alternating bands of fibres and vessels surrounded by paratracheal parenchyma were found; bands of resin canals were only occasional. In the juvenile wood of Swietenia and Carapa no synchronization of the increment curves was possible, whereas the increment curves obtained in the juvenile wood of Cedrela showed parallel run in growth. The increment curves obtained in adult wood of Swietenia and Cedrela indicate an annual formation of increment zones, whereas the number of increment zones in the xylem of Carapa was approximately 50% higher than the tree age (years) indicating that the growth increments of Carapa also were not annual during the adult phase of growth.The study of the intraannual growth dynamics of the trees showed that the formation of parenchyma bands in Swietenia is induced by dry periods before a cambial dormancy. The formation of parenchyma bands of Carapa was induced by extremely dry and extremely wet periods before a cambial dormancy, whereas fibre bands in Cedrela were induced by dry periods before a cambial dormancy and the formation of vessel bands embedded in paratracheal parenchyma was induced by wet periods after a cambial dormancy. In addition, insect attack (Hypsipyla grandella) induced locally restricted formation of parenchyma bands and bands of resin canals in Swietenia, Carapa and Cedrela.

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Section: Study Sites and Tree Selectionmentioning

confidence: 99%

Formation of Increment Zones and Intraannual Growth Dynamics in the Xylem of Swietenia Macrophylla, Carapa Guianensis, and Cedrela Odorata (Meliaceae)

Dünisch¹,

Bauch²,

Gasparotto³

2002

IAWA J

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“…The wood from trees of Zanthoxylum genus is employed in the Amazon region for agricultural instruments manufactoring, also oars, bodyworks and civil construction (Le Cointe, 1947;Cowan & Smith, 1973;Lorenzi, 1992;Loureiro & Lisboa, 1992).…”

Section: Introductionmentioning

confidence: 99%

Cytotoxic evaluation of essential oil from Zanthoxylum rhoifolium Lam. leaves

2007

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Zanthoxylum rhoifolium Lam is a plant popularly used as antimicrobial, for malaria and inflammatory treatment. The essential oil of Z. rhoifolium was extracted and its cytotoxic effects against HeLa (human cervical carcinoma), A-549 (human lung carcinoma), HT-29 (human colon adenocarcinoma), Vero (monkey kidney) cell lines and mice macrophages were evaluated. Some of the terpenes of its essential oil (β-caryophyllene, α-humulene, α-pinene, myrcene and linalool) were also tested to verify their possible influence in the oil cytotoxic activity. The results obtained permitted to confirm that the essential oil is cytotoxic against tumoral cells (CD 50 = 82.3, 90.7 and 113.6 µg/ml for A-549, HeLa e HT-29 cell lines, respectively), while it did not show cytotoxicity against non-tumoral cells (Vero and mice macrophages). Thus, the essential oil from Z. rhoifolium leaves seems to present a possible therapeuthic role due to its selective cytotoxic activity against tumoral cell lines. KEYWORDSZanthoxylum, Essential oil, cytotoxicity, β-caryophyllene, α-humulene Avaliação citotóxica do óleo volátil extraído das folhas do

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“…A madeira de M. acaciifolium é utilizada na produção de compensados, móveis, carpintaria, marcenaria, embalagens, celulose para papel e tábuas de boa qualidade, é bem flexível tomando formas variadas (Loureiro & Lisboa 1979). É conhecida popularmente como arapari, araparizeiro, arapari-de-piranheiro, piratanha, arapari-da-várzea, raparigueira, fava.…”

Section: Resultsunclassified