IAWA List of Microscopic Bark Features

Angyalossy, Verônica; Pace, Marcelo R.; Evert, Ray F.; Marcati, Carmen Regina; Oskolski, Alexei A.; Terrazas, Teresa; Kotina, Ekaterina L.; Lens, Frédéric; Mazzoni-Viveiros, Solange Cristina; Angeles, Guillermo; Machado, Sílvia Rodrigues; Crivellaro, Alan; Rao, K. S.; Junikka, Leo; Николаева, Н.Н.; Baas, Pieter

doi:10.1163/22941932-20160151

Cited by 178 publications

(107 citation statements)

References 17 publications

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“…The pore diameter was measured including the callose collar, which is the result of experimental procedures and is not expected to be present in the cells' functional state (Mullendore et al, 2010). The secondary phloem can be divided into conducting and nonconducting phloem (Angyalossy et al, 2016). All comparisons and measurements were carried out exclusively in the conducting phloem, except for qualitative descriptions of sclerenchyma, which involved the nonconducting phloem.…”

Section: Sampling and Microscopic Analysismentioning

confidence: 99%

“…New Phytologist typically appear in clusters (Esau, 1969;Angyalossy et al, 2016). In addition, fiber-sclereids are, like sclereids, derived from parenchymatous cells, but resemble the shape and growth pattern of fibers (Parameswaran, 1980).…”

Section: Researchmentioning

confidence: 99%

“…Another type refers to compound end walls, which typically have inclined orientation and contain multiple sieve areas, which can be scalariform or reticulate. Often, an additional type is defined for species that show both simple and compound end walls (Esau & Cheadle, 1959;Angyalossy et al, 2016). Gymnosperms have end walls that reunite numerous sieve areas but without forming sieve plates, as pores at the end wall are equal in width to those of the lateral walls.…”

Section: Introductionmentioning

confidence: 99%

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Height‐related scaling of phloem anatomy and the evolution of sieve element end wall types in woody plants

Liesche

Pace

et al. 2016

New Phytologist

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Summary In the sieve elements (SEs) of the phloem, carbohydrates are transported throughout the whole plant from their site of production to sites of consumption or storage. SE structure, especially of the pore‐rich end walls, has a direct effect on translocation efficiency. Differences in pore size and other features were interpreted as an evolutionary trend towards reduced hydraulic resistance. However, this has never been confirmed.Anatomical data of 447 species of woody angiosperms and gymnosperms were used for a phylogenetic analysis of end wall types, calculation of hydraulic resistance and correlation analysis with morphological and physiological variables. end wall types were defined according to pore arrangement: either grouped into a single area (simple) or into multiple areas along the end wall (compound).Convergent evolution of end wall types was demonstrated in woody angiosperms. In addition, an optimization of end wall resistance with plant height was discovered, but found to be independent of end wall type. While physiological factors also showed no correlation with end wall types, the number of sieve areas per end wall was found to scale with SE length.The results exclude the minimization of hydraulic resistance as evolutionary driver of different end wall types, contradicting this long‐standing assumption. Instead, end wall type might depend on SE length.

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Section: Sampling and Microscopic Analysismentioning

confidence: 99%

Section: Researchmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Height‐related scaling of phloem anatomy and the evolution of sieve element end wall types in woody plants

Liesche

Pace

et al. 2016

New Phytologist

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“…from Java. The author suggested that successive cambia in the genus were likely derived from parenchyma of the phloem, differentiated interior to the sclerenchyma strands of the primary body (here named pericyclic fibers, following the IAWA Bark Committee, Angyalossy et al, ). This origin was later corroborated by Kalberlah (), from studies on the same species, also from Java.…”

Section: Introductionmentioning

confidence: 99%

Structure and ontogeny of successive cambia in Tetrastigma (Vitaceae), the host plants of Rafflesiaceae

Pace

Angyalossy

Acevedo‐Rodríguez

et al. 2018

J of Sytematics Evolution

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Successive cambia in Vitaceae have been reported solely for Tetrastigma, a diverse genus of lianas found primarily in tropical Asia, extending into Australia. However, the structure and origin of these successive cambia have never been fully studied. Here we report the presence of this cambial variant in Tetrastigma retinervum and T. voinierianum, and describe its ontogeny in detail in the latter. New cambia appear successively in stems of Tetrastigma differentiating from the innermost parenchyma cells of the primary phloem, which are located interior to the pericyclic fiber strands. This study constitutes the first report of successive cambia being derived from primary phloem parenchyma in woody plants as a whole. Both species are members of Tetrastigma clade VI, the most species‐rich lineage within the genus. The examination of mature stems of additional species of Tetrastigma should determine the distribution of this unique type of cambial variant in the genus and enhance our understanding of the adaptive significance of this unusual character.

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“…The observation and description of anatomical features allowed the identification of the taxon of the wood and bark samples through comparison with the description available in wood anatomy textbooks, atlases and database [5][6][7][8].…”

Section: Identification Of Wood and Barkmentioning

confidence: 99%

Preliminary investigation of the materials and techniques used in a decorated wooden stick of king Tutankhamun

et al. 2018

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The focus of this work is to shed more light on materials and decorating techniques used on a decorated wooden stick of king Tutankhamun. Moreover, the authors were interested in using a developed methodology to unfold the cylindrical decorations of the stick. The botanical species of the wood and bark samples were identified by observing thin sections under an optical transmission light microscope; the decorating materials layered on the wood surface were analyzed by scientific and analytical techniques including optical microscopy (OM), environmental scanning electron microscopy (ESEM), X-ray fluorescence spectroscopy (XRF), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). The analyses provided new information concerning the materials and decorating techniques that varied from top to bottom of the same stick. The characterization of this stick represents a first step in determining the materials and decorating techniques used to produce this particular kind of sticks during king’s Tutankhamun period.

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IAWA List of Microscopic Bark Features

Cited by 178 publications

References 17 publications

Height‐related scaling of phloem anatomy and the evolution of sieve element end wall types in woody plants

Height‐related scaling of phloem anatomy and the evolution of sieve element end wall types in woody plants

Structure and ontogeny of successive cambia in Tetrastigma (Vitaceae), the host plants of Rafflesiaceae

Preliminary investigation of the materials and techniques used in a decorated wooden stick of king Tutankhamun

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