Growth rings in cerrado woody species: occurrence and anatomical markers

Marcati, Carmen Regina; Sonsin‐Oliveira, Júlia; Machado, Sílvia Rodrigues

doi:10.1590/s1676-06032006000300001

Cited by 37 publications

(26 citation statements)

References 14 publications

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“…Marcati et al (2006) reported distended rays delimiting growth rings in addition to other markers to some species from cerrado (Piptocarpha rotundifolia (Asteraceae), Annona coriacea and A. crassiflora (Annonaceae)). The distended rays delimiting growth rings might be advantageous in addition to the other growth markers helping the dendrochronologists in the correct distinction of the growth rings limits.…”

Section: Discussionmentioning

confidence: 99%

Comparative wood anatomy of root and stem of Citharexylum myrianthum (Verbenaceae)

Marcati

Longo

Wiedenhoeft³

et al. 2014

Rodriguésia

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Root and stem wood anatomy of C. myrianthum (Verbenaceae) from a semideciduous seasonal forest in Botucatu municipality (22º52'20"S and 48º26'37"W), São Paulo state, Brazil, were studied. Growth increments demarcated by semi-ring porosity and marginal bands of axial parenchyma were observed in the wood of both root and stem. Many qualitative features were the same in both root and stem: fine helical thickenings, and simple and multiple perforation plates in vessel elements; large quantities of axial parenchyma in the growth rings, grading from marginal bands and confluent forming irregular bands in earlywood to lozenge aliform in latewood; axial parenchyma cells forked, and varied wall projections and undulations; septate fibres; forked and diverse fibre endings. Quantitative features differing between root and stem wood were evaluated using student's t-test, and vessel frequency, vessel element length, vessel diameter, ray height, and vulnerability and mesomorphy indices differed significantly. Root wood had lower frequency of vessels, narrower and longer vessel elements, and taller rays than wood of the stem. The calculated vulnerability and mesomorphy indices indicated that C. myrianthum plants are mesomorphic. Roots seem to be more susceptible to water stress than the stem. ResumoA anatomia da madeira da raiz e do caule de Citharexylum myrianthum (Verbenaceae) que ocorre em uma área de floresta estacional semidecídua próximo à cidade de Botucatu (22º52'20"S e 48º26'37"W), estado de São Paulo, Brasil, foi estudada. Camadas de crescimento distintas, demarcadas por anel semi-poroso e faixas marginais de parênquima axial foram observadas em ambos os órgãos. As características qualitativas observadas tanto em raiz quanto em caule foram: espessamentos helicoidais finos e placas de perfuração simples e múltiplas em elementos de vaso; grandes quantidades de parênquima axial nos anéis de crescimento, em faixas marginais a confluente formando faixas irregulares no lenho inicial a aliforme losangular no lenho tardio; células do parênquima axial bifurcadas, com projeções e ondulações na parede; fibras septadas; fibras bifurcadas e com diversas terminações. Na análise quantitativa comparativa entre raiz e caule foi aplicado teste t-student que mostrou diferenças significativas na frequência e diâmetro de vasos; comprimento dos elementos de vaso; altura dos raios; índices de vulnerabilidade e mesomorfia. A madeira da raiz teve menor frequência de vasos, vasos com menor diâmetro e elementos mais longos, e raios mais altos. Os índices de vulnerabilidade e mesomorfia indicaram que as plantas de C. myrianthum são mesomórficas. As raízes parecem estar mais susceptíveis ao estresse hídrico do que os caules. Palavras-chave: anatomia da madeira, floresta estacional semidecídua, xilema secundário. Comparative wood anatomy of root and stem of Citharexylum myrianthum (Verbenaceae)Anatomia comparada da madeira de raiz e caule em Citharexylum myrianthum (Verbenaceae)

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Section: Discussionmentioning

confidence: 99%

Comparative wood anatomy of root and stem of Citharexylum myrianthum (Verbenaceae)

Marcati

Longo

Wiedenhoeft³

et al. 2014

Rodriguésia

Self Cite

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“…For example, the reduction of cell expansion and growth in W. trihostephia during periods of low water availability, combined with the stable volume of radial parenchyma cells and the consequent cambium inactivity, forms seasonal growth rings. Marcati et al (2006) discussed the occurrence of seasonal growth rings in a variety of different Cerrado species, and concluded that it may be related to a distinct annual dry season; however, this feature is poorly understood for species of the Chaco and deserves further investigation into its adaptive value.…”

Section: Underground System Anatomymentioning

confidence: 99%

Structural features of species of Asteraceae that arouse discussions about adaptation to seasonally dry environments of the Neotropics

Ferraro

Scremin-Dias

2017

Acta Bot. Bras.

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Seasonally-dry environments of the Neotropics, such as the South American Chaco, exert selective pressures on vegetation through a pronounced water defi cit. We describe the underground system and leaf anatomy of three species of Asteraceae from the Brazilian portion of the Chaco (Pterocaulon purpurascens Malme, Wedelia trichostephia DC., and Pectis gardneri Baker), aiming to describe their structural and adaptive features using standard plant anatomy techniques. Pterocaulon purpurascens and W. trichostephia exhibited slightly thickened xylopodia, with gemmiferous character and self-grafted stem shoots; Pectis gardneri displayed a slightly-thickened tuberous root with storage substances. Longitudinal sequences of cells with highly thickened walls forming globular protrusions were found throughout the extension of the periderm of Pectis gardneri, while senescent trichomes were found in the periderm of W. trichostephia. Schyzogenous aerenchyma was found in P. purpurascens. Aquifer cells, composing vascular rays of secondary phloem and xylem, are reported for this species. Leaves of the three species are perennial and amphistomatic, with aquifer cells in a variety of tissues. Pectis gardneri exhibits a "Kranz-type" anatomy with lignifi ed bristles with stomata. Th e features described for the species play important role in water uptake and/or storage, which prevent excessive water loss during environmental or physiological stress periods.

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“…Na região de estudo, a estação seca estende-se de maio a setembro, com média da precipitação no período de 40,6 a 72,5 mm, o que pode estar provocando a formação de camadas de crescimento no lenho de S. adstringens. Marcati et al (2006), ao analisarem o lenho de 48 espécies lenhosas de cerrado, verificaram que 61% delas possuíam camadas de crescimento bem definidas e 33% apresentaram camadas de crescimento pouco definidas.…”

Section: Figura 2 Figureunclassified

ANATOMIA DO LENHO DE RAIZ, TRONCO E GALHO DE BARBATIMÃO (Stryphnodendron adstringens (Mart) Coville)

Goulart

Ribeiro

Mori

et al. 2015

CERNE

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ANATOMIA DO LENHO DE RAIZ, TRONCO E GALHO DE BARBATIMÃO (Stryphnodendron adstringens (Mart) Coville)RESUMO: Objetivou-se analisar o lenho de raiz, tronco e galho de barbatimão, Stryphnodendron adstringens em área de cerrado, no município de Lavras, MG. Amostras de lenho do tronco e do galho foram retiradas a 0, 25, 50, 75 e 100% da altura total do tronco e comprimento total do galho. Amostras de lenho das raízes foram retiradas a 40 cm de profundidade do solo. Qualitativamente o lenho do barbatimão possui camadas de crescimento distintas para o tronco e galho; na raiz, encontram-se pouco definidas. Porosidade difusa. Placas de perfuração simples. Pontoações intervasculares e raiovasculares, areoladas, alternas e com guarnições. Parênquima paratraqueal vasicêntrico. Raios predominantemente unisseriados, apresentando raios multisseriados. Os raios são heterocelulares, onde o corpo do raio é formado por células procumbentes e margens com células quadradas e eretas. Observaram-se, raios homogêneos formados apenas por células procumbentes. Presença de cristais nas células dos parênquimas axiais, radiais e nas fibras. Quantitativamente, as características relevantes para o lenho foram: maior frequência de vasos para o galho; paredes das fibras mais espessas no lenho de raiz e raio mais largo no tronco. WOOD ANATOMY OF ROOT, TRUNK AND BRANCH FROM BARBATIMÃO (Stryphnodendron adstringens (Mart) Coville) ABSTRACT:This study aimed to analyze the wood of root, trunk and branch from barbatimão (Stryphnodendron adstringens) in the cerrado area, in Lavras (Minas Gerais State, Southeastern Brazil). Trunk and branch wood samples were removed at 0, 25, 50, 75 and 100% of the trunk and branch total height. Root wood samples were removed at 40 cm depth soil. Qualitatively the barbatimão wood has distinct growth layers for the trunk and branch; at the root they are poorly defined. Diffuse porosity. Simple perforation plates. Inter-vascular and vessel-ray. Bordered, alternate and with garnishes. Vasicentric paratracheal parenchyma. Uniseriate rays predominant, presenting multiseriate rays. The rays are heterocellular, where the ray body is formed by procumbent cells and margins with square and upright cells. It was observed that homogeneous rays are formed only by procumbent cells. Crystals are present at the axial and radial parenchyma cells, and in the fibers. Quantitatively the relevant features to the wood were: higher vessel frequency in branch wood; thicker wall fibers in the root wood and larger rays in the trunk.

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Growth rings in cerrado woody species: occurrence and anatomical markers

Cited by 37 publications

References 14 publications

Comparative wood anatomy of root and stem of Citharexylum myrianthum (Verbenaceae)

Comparative wood anatomy of root and stem of Citharexylum myrianthum (Verbenaceae)

Structural features of species of Asteraceae that arouse discussions about adaptation to seasonally dry environments of the Neotropics

ANATOMIA DO LENHO DE RAIZ, TRONCO E GALHO DE BARBATIMÃO (Stryphnodendron adstringens (Mart) Coville)

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