Climate trends in the wood anatomy of Acacia sensu stricto (Leguminosae: Mimosoideae).

摘要: Background and aims This study investigates the structural diversity of secondary xylem 54 species Acacia from four taxonomic sections collected across five climate regions along a 1200 km E-W transect sub-tropical [approx. 1400 mm mean annual precipitation (MAP)] to arid (approx. 240 MAP) in New South Wales, Australia. sensu stricto ( s.s. ) is critical group for understanding effect phylogeny on functional anatomy wood. Methods Wood samples were sectioned transverse, tangential radial planes light microscopy analysis. Key results The wood usually has thick-walled vessels fibres, paratracheal parenchyma uniseriate biseriate rays, occasionally up cells wide. greater abundance gelatinous fibres semi-arid may have ecological significance. Prismatic crystals chambered axial increased species. Whereas vessel diameter showed only small decrease region, there was significant 2-fold increase frequency consequent 3-fold vulnerability index. Conclusions Although underlying determines qualitative structure, influence , which an ideal genus these factors.