Seasonal Behaviour of Vascular Cambium in Teak (Tectona Grandis) Growing in Moist Deciduous and Dry Deciduous Forests

Rao, K. S.; Rajput, Kishore S.

doi:10.1163/22941932-90001553

Cited by 45 publications

(52 citation statements)

References 12 publications

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“…The radial sequence of cells corresponds to the temporal sequence of appearance in the trees, allowing wood formation to be assessed over different intra-annual time scales depending on the resolution required by the analysis, from a few hours (Ford et al 1978) to one week Rossi et al 2006b), to several weeks (Bäucker et al 1998;Rao & Rajput 1999). A precise description of the period of wood formation allows the days spent in differentiation by each cell to be estimated (Wodzicki 1971;Horacek et al 1999;Rossi et al 2003).…”

Section: Associate Editor: Nigel Chaffeymentioning

confidence: 99%

Assessment of Cambial Activity and Xylogenesis by Microsampling Tree Species: An Example at the Alpine Timberline

Rossi¹,

Deslauriers²,

Anfodillo³

2006

IAWA J

223

212

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Mechanisms of cell production and maturation and dynamics of xylem formation have been widely studied in trees in order to better characterize stem radial growth. Histological analyses have been used in this study to describe cambial activity and xylem cell differentiation in Larix decidua, Pinus cembra and Picea abies at the Alpine timberline. Wood microcores were collected weekly from April to October 2003 and cross sections prepared to distinguish xylem cells of the growing tree ring and to determine the number of cells in the cambial zone, radial cell enlargement, secondary wall thickening and lignification and the number of mature tracheids. The anatomical changes characterizing the phases of xylem cell production and differentiation during the year are described and discussed. All species showed the same trend of xylem formation. Three delayed bell-shaped curves and an S-shaped curve were observed for cambium, enlarging and wall thickening cells and mature cells, respectively. Cells divided in the cambial zones from April-May to August, depending on the species. From 100 to 130 days were required to complete cell differentiation. Tree-ring formation ended during September. The average periods spent on radial enlargement, and secondary cell wall thickening and lignification were estimated at 7–10 and 20–25 days, respectively.

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Section: Associate Editor: Nigel Chaffeymentioning

confidence: 99%

Assessment of Cambial Activity and Xylogenesis by Microsampling Tree Species: An Example at the Alpine Timberline

Rossi¹,

Deslauriers²,

Anfodillo³

2006

IAWA J

223

212

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“…Apesar da maior pluviosidade, a temperatura mais elevada leva a uma maior evapotranspiração. Considerando-se que a atividade cambial está relacionada com os fatores climáticos (Rao & Rajput 1999;Salvador et al 1997), pode-se observar que os espécimes estudados em Serra Talhada apresentam uma maior taxa de esclerificação representada pela maior percentagem de fibras no lenho, corroborando Webber (1936) e Baas (1982. Estes autores observaram que os diferentes componentes anatômicos da madeira resultantes da atividade do câmbio vascular podem apresentar diferenças quantitativas em função das adaptações ao ambiente e situação fisiológica do fluxo da água.…”

Section: Comparação Em Relação Ao Ambienteunclassified

Estudo comparativo da madeira de Mimosa ophthalmocentra Mart. ex Benth e Mimosa tenuiflora (Willd.) Poir. (Fabaceae-Mimosoideae) na caatinga nordestina

Silva

Santos

Gasson³

et al. 2011

Acta Bot. Bras.

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Estudo comparativo da madeira de Mimosa ophthalmocentraMart. ex Benth e Mimosa tenuifl ora (Willd.) Poir. (Fabaceae-Mimosoideae) na caatinga nordestina 1 RESUMO (Estudo comparativo da madeira de Mimosa ophthalmocentra Mart. ex Benth e Mimosa tenuifl ora (Willd.) Poir. (FabaceaeMimosoideae) na caatinga nordestina). Pela importância econômica da madeira de algumas espécies do gênero Mimosa L. ocorrentes na caatinga nordestina e pelo fato de Mimosa ophthalmocentra Mart. ex Benth. (jurema-de-imbira), às vezes, ser confundida com Mimosa tenuifl ora (Willd.) Poir. (jurema-preta) ou vice-versa, este trabalho objetivou apresentar novos dados referentes à anatomia e densidade básica da madeira das duas espécies, visando oferecer subsídio para identifi cação das duas espécies, identifi car caracteres anatômicos da madeira relacionando-os com o ambiente caatinga e apresentar o potencial energético que sua madeira possui. O estudo anatômico e a determinação da densidade da madeira foram realizados com amostras ao nível do peito (1,30 m acima do solo) e em dois galhos com diferentes diâmetros, de espécimes ocorrentes nos municípios de Serra Talhada e Sertânia, Pernambuco, Brasil. As espécies apresentam distinção expressa através do tipo de casca, coloração do cerne e do alburno, além das características peculiares da madeira. Mimosa ophthalmocentra apresenta camadas de crescimento distintas, constituídas por linhas de parênquima axial contendo cristais, parênquima axial escasso e menor quantidade de raios por mm 2 . Já Mimosa tenuifl ora apresenta camadas de crescimento distintas, porém sem cristais, parênquima axial vasicêntrico, em faixas ou aliforme confl uente, e maior percentagem de raios. Ambas apresentam algumas estruturas da madeira com as características anatômicas comuns às diversas espécies do gênero Mimosa, contribuindo assim para uma melhor caracterização do gênero. Pelos parâmetros anatômicos da madeira e pela elevada densidade básica (>0,84 g/cm 3 ), concluiu-se que as duas espécies apresentam perspectivas seguras para a produção de álcool combustível e carvão vegetal desde a fase de lenho juvenil. Mimosa ophthalmocentra apresenta maior potencial energético, pela maior percentagem de fi bras e por possuir parênquima escasso e menor percentagem de raios. ("jurema-preta") and vice versa, this research aimed to present new data related to the anatomy and basic density of the wood of both species; to contribute to the taxonomic study for diff erentiating them; to identify anatomical characters of the wood relating them to the caatinga environment; and to present the energetic potential that they possess. Th e anatomical study and wood density determination were carried out with samples at dbh level and with two branches of individuals within the municipalities of Serra Talhada and Sertânia (Pernambuco). Th e species both diff ered in bark type, color of heartwood and sapwood, besides the diff erent anatomical characteristics found in the wood. Mimosa ophtalmocentra has distinct growth layers consisting of parenchy...

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“…Teak (Tectona grandis L.f.) is one of the most well known tropical tree species for its high-quality and prized timber (Rao & Rajput 1999, Bhat & Priya 2004). Teak wood is suitable for multiple uses due to its various favorable characteristics and properties, including fine grain, beautiful golden color, and durability with respect to weather, insects and fungi (Kaosa-ard 1986).…”

Section: Introductionmentioning

confidence: 99%

“…Wood formation started after the budding and continued until the end of the rainy season (Nobushi et al 1996), while drought during active growing season caused false ring formation in teak (Priya & Bhat 1998, Palakit et al 2012. Rao & Rajput (1999) found the maximum radial-growth of teak during the monsoon period, while Kokutse et al (2010) reported that annual ring width is strongly depended on mean monthly temperature and is associated with bud break during the rainy season.…”

Section: Introductionmentioning

confidence: 99%

Climatic fluctuations trigger false ring occurrence and radial-growth variation in teak (Tectona grandis L.f.)

Palakit¹,

Duangsathaporn²,

Siripatanadilok³

2016

iForest

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The objective of this study was to examine the interaction of extreme growth years in teak (Tectona grandis) with climatic conditions of current, antecedent and subsequent years, in order to explain the nature and the effects of climatic variability on teak growth in northeastern Thailand. A 33-year treering index was constructed and extreme growth years during the period 1976-2008 were identified. A superposed epoch analysis (SEA) was used to study the interaction of climatic data and extreme growth years. Extreme growth years were derived from eight wider and seven narrower annual rings identified using the Cropper's method. Seventeen false rings were detected using the threshold value ≥ 80% of false ring occurrence for all samples in each growth year. False ring occurrence was associated with narrow ring width formation and triggered by increasing maximum and mean temperatures at the beginning of the rainy season (May to August). In the third year after false ring formation, we observed a pattern of wet year occurrence when annual rainfall and relative humidity in September to December were higher than in adjacent years. Moreover, in the sixth year before false ring formation, a wet year was observed when relative humidity in September to December was higher than in adjacent years. Wider ring width index occurring in a particular year was found to be triggered by a decrease in maximum and mean temperatures in May to August of the current year, suggesting that wet years promote teak growth. The third year after the formation of wider rings was characterized by a low annual rainfall. Our results showed that drought years trigger false ring and narrow ring formation, while wet years trigger wide ring formation in teak. A cycle of wet years between the sixth year prior to, and the third year after, the formation of false rings was also observed, as well as the occurrence of drought in the third year since the formation of wide rings. False ring, narrow ring and wide ring occurrences appear to be good indicators of a 3-6 year climate fluctuation pattern, similar to that of the El Niño-Southern Oscillation (ENSO) cycle in this region.

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Seasonal Behaviour of Vascular Cambium in Teak (Tectona Grandis) Growing in Moist Deciduous and Dry Deciduous Forests

Cited by 45 publications

References 12 publications

Assessment of Cambial Activity and Xylogenesis by Microsampling Tree Species: An Example at the Alpine Timberline

Assessment of Cambial Activity and Xylogenesis by Microsampling Tree Species: An Example at the Alpine Timberline

Estudo comparativo da madeira de Mimosa ophthalmocentra Mart. ex Benth e Mimosa tenuiflora (Willd.) Poir. (Fabaceae-Mimosoideae) na caatinga nordestina

Climatic fluctuations trigger false ring occurrence and radial-growth variation in teak (Tectona grandis L.f.)

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