Anatomical properties of compression wood

 

Light microscopy of compression wood in Sitka spruce

Photographs Forest Research

Severe compression wood

Normal latewood

Normal earlywood

Scanning Electron microscopy of compression wood in Sitka spruce

Photograph courtesy of Centre for Ecology and Hydrology

Measurement of microfibril angle

Photographs courtesy of University of Florence

Each single portion of the ring(EW and LW) are subjected to stress cycles (wetting and drying).

Microscopic section of 15-18 m in thick are cut and coloured using iodine solution, according to Senft & Bensted method.

25 angles measured for each portion of annual ring.

Microscopic examination of compression wood in larch

Photograph courtesy of University of Florence