PERTANIKA JOURNAL OF TROPICAL AGRICULTURAL SCIENCE

 

e-ISSN 2231-8542
ISSN 1511-3701

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Antioxidative Responses of Tree Species in Ayer Hitam Forest, Selangor, Peninsular Malaysia

Fadzillah, N.M. and I Faridah Hanum

Pertanika Journal of Tropical Agricultural Science, Volume 22, Issue 2, September 1999

Keywords: Ayer Hitam Forest, antioxidative responses, tree species, antioxidants, oxidative deterioration

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Antioxidative responses of eight tree species namely Atrocarpus elasticus, Endospermum diadenum, Vitex pinnata, Pellacalyx axillaris, Garcinia atroviridis, Gironniera nervosa, Bouea oppositifolia and Callerya atropurpurea were determined from samples collected from both the interior and fringe forest regions of Ayer Hitam Forest Reserve. These antioxidative responses measured include the extent of oxidative deterioration of cellular membrane lipids as well as the concentrations of ascorbate and a-tocopherol, two important endogeneous antioxidants. All eight species showed significant differences in the extent of oxidative deterioration between the interior and fringe forest regions where generally higher levels of membrane lipid peroxidation or oxidative deterioration were observed in samples from the fringe forest regions except for V.pinnata and G. nervosa. Concentrations of a-tocopherol were also found to be generally higher in the fringe forest regions except for V.pinnata and G. nervosa. Ascorbate concentrations were however found to be higher in all the tree species sampled from the fringe forest. This thus indicates higher levels of stress conditions with respect to oxidative stress manifested by higher levels of disturbance in the fringe forest regions. While C. atropurpurea may represent a good and sensitive indicator species in determining stress conditions in the forest, V.pinnata and G. nervosa may represent tree species that are efficient in minimising oxidative deterioration in stress conditions.

ISSN 1511-3701

e-ISSN 2231-8542

Article ID

JTAS-0183-1999

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