| Seasonal cambial activity Tetrameles nudiflora R. Br. in Trat Province, Thailand |
| Paper ID : 1024-ADA2013 |
| Authors: |
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Sritam Danpradit * Faculty of Environment and Resource Studies, Mahidol University, Nakhon Pathom 73170, Thailand |
| Abstract: |
| Tropical forests are very important natural resources as they provide many valuable products including fruits and nuts, medicinal herbs, lumber etc. Besides, they influence the climate. Through transpiration, the enormous numbers of plant found in tropical forest return huge amount of water to the atmosphere, increasing humidity and rainfall. In addition, tropical rainforest replenish the air by utilizing CO2 and giving off CO2. By fixing CO2 they also help to maintain the low atmosphere CO2 level. Koh Chang is the National’s second largest Island after Phuket, covering an area of 429 sq.km. It is rich of tropical rainforest. Since it is attractive by tourist and certainly climate change impact, forest degradation can see time to time. These cause seem direct and indirect impact to tropical rainforest degradation. Various tropical tree species exist at Koh Chang; some the dominant species are Lithocarpus ceriferus, Barringtonia macrocarpa Hassk, Mesua ferrea Linn, Calophyllum thorelii Pierre, Hopea avellanea Heim and Tetrameles nudiflora R.Br. Particular Tetrameles nudiflora R.Br is a species of plant in the Tetramelaceae family. It was listed in IUCN red list of threatened species. At Koh Chang this species appear large emergent plants along the canal, stream or foot hill slope. This study aims to investigate the relationship between the cambial activity of Tetrameles nudiflora R. Br. and climatic factors (e.g., rainfall, temperature and soil moisture) in Trat Province, Thailand. Cambial samples were collected once a month from December 2011 to June 2012 and were collected twice a month from July to November 2012. Total of sample was 54 samples. The samples were prepared by the PEG 1500 technique. Cross sections of 15–30 µm thickness were cut using a sliding microtome. The cambial activity was investigated by counting undifferentiated cells in the cambial zone. The numbers of cambial in each month were compared with data from dendrometer. Statistical analysis was done using Pearson’s correlation. |
| Keywords: |
| cambial activity, climate, Tetrameles nudiflora R. Br., Trat Province, Thailand |
| Status : Abstract Accepted |
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