EcoFoG

 

Tension Wood Diversity

Data

TaxonAnatomic platesG layerFRD TWFRD RWFTD TWFTD RWFMD TWFMD RWFLRD TWFLRD RWFLTD TWFLTD RWFLMD TWFLMD RWRRWT TWRRWT RWTRWT TWTRWT RWRWT TWRWT RWVF TWVF RWVFBT 1VFBT 2VGI TWVGI RWSI TWSI RWVRD TWVRD RWVTD TWVTD RWVS TWVS RW
Oxandra asbeckii (Annonaceae) Undetermined11.5610.8113.9912.8612.7711.842.172.413.093.842.633.130.810.780.780.720.80.7518.3920.08000.580.57-0.82-2.6682.8185.6482.6187.1354345904

Contents

Anatomic criteria can be divided into two classes:

Qualitative criteria

  • Presence of a G layer (or a similar layer) and its aspect.
  • Details on sections made in the G (or similar) layers.

Quantitative criteria

In regular and tension wood (a value for regular wood RW and another for tension wood TW):

  • Vessels radial diameter (VRD), tangential diameter (VTD) and area (VS) of isolated lumens.
  • Vessel frequency (VF), in mm-².
  • Shape index (SI) of isolated vessels, computed by.
    Shape index:
  • Vessels grouping index (VGI): total number of vessels / number of groups.
  • Fibers external radial diameter (FRD) tangential diameter (FTD) and mean diameter (FMD).
  • Fiber lumen external radial diameter (FLRD), tangential diameter (FLTD) and mean diameter (FLMD).
  • Linear ratio of walls in all fibers (RWT), computed by: (FMD - FLMD) / FMD.
  • Linear ratio of walls in radial fibers (RRWT), computed by: (FRD - FLRD) / FRD.
  • Linear ratio of walls in tangential fibers (TRWT), computed by: (FTD - FLTD) / FTD.
  • VFBTi: vessel frequency in each sample (i = 1 or 2) of tension wood in Ruelle (2003).

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Last update on 2/28/2011