Find in Library

This study aims to investigate the relationship between the cambial activity of Rhizophora mucronata, Avicenniaalba, and Avicennia marina and climatic factors (e.g., rainfall, temperature, salinity, and sea water level) in Samut SakhonProvince, Thailand. Cambial samples were collected once a month from January to December 2009, resulting in total of 18samples from 9 trees in every month. The samples were prepared by the epoxy technique. The cambial activity was investigatedby counting undifferentiated cells in the cambial zone. The relationship between cambial activity and climatic factorswere investigated by Pearson’s correlation. Correlations among the cambial activity of the three species with rainfall, temperature,and salinity were weak and statistically insignificant. The strongest and most statistically significant relationshipswere observed with sea water level of R. mucronata (r = -0.67, p<0.01) and A. alba (r = -0.52, p<0.05). Therefore, cambialactivity of the three species is not driven by seasonal climatic factors. For A. alba and A. marina, more than one cambiumwas found to be simultaneously active.