scholarly journals Wood Anatomy of Calyceraceae with Reference to Ecology, Habit, and Systematic Relationships

Aliso ◽  
1998 ◽  
Vol 17 (1) ◽  
pp. 63-76 ◽  
Author(s):  
Sherwin Carlquist ◽  
Melanie DeVore
Keyword(s):  
Wood Anatomy ◽  
Systematic Relationships

scholarly journals A SURVEY OF THE SYSTEMATIC WOOD ANATOMY OF THE RUBIACEAE

IAWA Journal ◽  
2002 ◽  
Vol 23 (1) ◽  
pp. 1-67 ◽  
Author(s):  
Steven Jansen ◽  
Elmar Robbrecht ◽  
Hans Beeckman ◽  
Erik Smets
Keyword(s):  
Wood Anatomy ◽  
Secondary Xylem ◽  
Type I ◽  
Type Ii ◽  
Axial Parenchyma ◽  
Mineral Inclusions ◽  
The Family ◽  
Anatomical Characters ◽  
Systematic Relationships ◽  
Recent Insight

Recent insight in the phylogeny of the Rubiaceae, mainly based on macromolecular data, agrees better with wood anatomical diversity patterns than previous subdivisions of the family. The two main types of secondary xylem that occur in Rubiaceae show general consistency in their distribution within clades. Wood anatomical characters, especially the fibre type and axial parenchyma distribution, have indeed good taxonomic value in the family. Nevertheless, the application of wood anatomical data in Rubiaceae is more useful in confirming or negating already proposed relationships rather than postulating new affinities for problematic taxa. The wood characterised by fibre-tracheids (type I) is most common, while type II with septate libriform fibres is restricted to some tribes in all three subfamilies. Mineral inclusions in wood also provide valuable information with respect to systematic relationships.

Wood Anatomy of Jacaranda (Bignoniaceae): Systematic Relationships in Sections Monolobos and Dilobos as Suggested by Twig and Stem Wood Rays

IAWA Journal ◽  
1997 ◽  
Vol 18 (4) ◽  
pp. 369-383 ◽  
Author(s):  
Gracielza Dos Santos ◽  
Regis B. Miller
Keyword(s):  
Wood Anatomy ◽  
Morphological Evidence ◽  
Stem Wood ◽  
Vessel Elements ◽  
Systematic Relationships ◽  
Square Cells ◽  
Generic Description ◽  
Number Of Cells

This report provides a generic description of the stern wood anatomy of 15 species of Jacaranda from seetions Monolobos and Dilobos. In Monolobos (excluding J. copaia), the rays are homocellular and exclusively uniseriate, occasionally with a small biseriate portion. In Dilobos, the rays are heterocellular and 2-3(-4) cells wide. To verify the differences in ray structure, 27 species of twig specimens were examined and compared with stern specimens of the same seetion. The wood anatomy corroborates morphological evidence that suggests partitioning of Jacaranda into two distinct seetions and supports the hypothesis that section Dilobos is primitive. The wood anatomy of Jacaranda copaia is distinct from that of other species in the genus. The vessels are larger in diameter and fewer per square millimetre, the vessel elements and fibres are longer, and the number of cells per parenchyma strand is higher. In addition, the rays are fewer per millimetre, taller, and homocellular to slightly heterocellular, with one irregular row of square cells, 2-3(-4) cells wide. Jacaranda copaia seems to be intermediate between seetions Monolobos and Dilobos.

Wood anatomy of two South Indian species ofAvicennia With 3 plates

1987 ◽  
Vol 98 (9-10) ◽  
pp. 537-542
Author(s):  
K. V. Krishnamurthy ◽  
K. Sigamani
Keyword(s):  
Wood Anatomy ◽  
Indian Species ◽  
South Indian

FEEDBACK OF WATER STRESS ON WOOD PROPERTIES OF TREES: EXPERIMENTS WITH MISTLETOES ON RHODODENDRON ARBOREUM SM.

1970 ◽  
Vol 11 (1) ◽  
Author(s):  
Mohan P. Devkota ◽  
Gerhard Glatzel
Keyword(s):  
Water Stress ◽  
Wood Anatomy ◽  
Wood Properties ◽  
Vessel Diameter ◽  
Conservation Area ◽  
Rhododendron Arboreum ◽  
Central Nepal ◽  
Inhibition Of Growth ◽  
Infected Area ◽  
Anatomical Parameters

Effects of infection by the mistletoe Scurrula elata (Edgew.) Danser, on wood properties of its common host Rhododendron arboreum Sm., were studied in the Annapurna Conservation Area of Central Nepal Himalaya. Heavy infection by mistletoes invariably causes decline of the host. Infested branches show inhibition of growth, defoliation and eventual death of branch parts distal to the site of infection. Anatomical properties of wood were compared in samples of branches proximal to the infection and in uninfected branches. The hypothesis that infection induces changes in basic wood anatomy could not be proven. Vessel density, vessel area, percentage lumen area and mean vessel diameter of the wood of infested and uninfected branches did not show any significant differences. The studied anatomical parameters were not correlated to the diameter of the host branch. These results show that infection by S. elata did not cause any changes in basic wood anatomy of its host R. arboreum. It appears that the studied anatomical parameters of Rhododendron wood are fairly stable and are not changed by stress due to infection by mistletoes. The damage to the host distal to the infected area most likely results from an insufficiency of total conductive area to supply both mistletoe and host. Unfortunately we could not determine annual conductive area increment, because R arboreum does not develop usable annual tree rings in the climate of the study area. Key words: Himalayas, mistletoe. Rhododendron arboreum, Scurrula elata, water stress, wood anatomy. Ecoprint Vol.11(1) 2004.

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