Avicennia marina is a mangrove species showing some remarkable features. It is the mangrove species with the widest latitudinal range and a disjunct zonation pattern. The species occurs both at the landward as at the seaward side of the mangrove habitat. In addition, the species is a botanical curiosity since its wood is formed by successive cambia. On sanded stem disks this results in a pattern of alternating dark and light coloured bands, respectively the xylem and phloem tissue. This study aims to gain insight in the formation of wood via successive cambia. Both stem disks of a plantation of known age and cambial marked ones were analysed with respect to number and width of the growth layers. Furthermore, micro-sections were made from samples of the outermost wood, taken at 130 cm height and stored in FAA. They were double stained with safranin-fast green for microscopic analysis of the wood. The results show that secondary growth in A. marina is not climatically driven. Although more research is needed, growth layer formation is demonstrated to be primarily controlled by an endogenous factor(s) with an additional influence of local site conditions. Further research on the secondary growth on a cellular scale will provide information, essential to unveil the nature and activity of successive cambia and their temporal and spatial plasticity.
|Name||COST E-50 CEMARE Conference|
|Conference||Finds and Results from the Swedish Cyprus Expedition: A Gender Perspective at the Medelhavsmuseet|
|Period||21/09/09 → 25/09/09|
- wood formation
- avicennia marina
- successive cambia
- kenyan mangrove