Wood Tracheid Morphology and Wood Density in Seven Clones of Pinus elliottii
Seven clones of Pinus elliotii were chosen as the research objects to measure the wood growth ring width,the earlywood and latewood width by micrometer under stereomicroscope.The tracheid length and width were observed and determined by using microscope after wood was macerated.Then the total latewood percentage and tracheid length-width ratio were calculated.Wood basic density and air density were measured by drainage method.There were high significant differences in growth ring width at 0.05 level between these clones.The total latewood percentage and wood basic density showed no significant difference among 7 clones at 0.05 level.However,the air density in all clones had significant differences at 0.05 level.Wood of clone 0-1302 had the biggest basic density.The tracheid length and width in early wood showed larger differences among 7 clones,in latewood,however,the differences were not significant.The tracheid length-width ratios in early-and late-wood were 62.7-85.9 and 92.4-116.9,respectively.The tracheid length distribution frequency in early wood and late-wood was mainly from 2 500 μm to 4 500 μm,suggesting that wood tracheid is medium length in all the 7 clones.As a result,the wood air density,growth ring width and tracheid morphology showed obvious differences in P.elliottiiinter family.The results would provide scientific information for high quality wood plantation breeding in P.elliottii.
国家科技期刊平台
NSTL
万方数据
维普
