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The dynamics of physiological properties of ebony (Diospyros celebica bakh) based on crown position and altitude
S A Paembonan1), S H Larengkeng2), S Millang1)

1) Silviculture Laboratory, Faculty of Forestry, Hasanuddin University, Makassar.
2) Forestry Biotechnology Laboratory, Faculty of Forestry, Hasanuddin University, Makassar.


Abstract

Knowledge of the physiological properties of tree species is one of the basic requirements in determining the prescription silvicultural treatment of stands in nature. This study aims to analyze the physiological characteristics of the species of ebony (Diospyros celebica Bakh), as one of the potential endemic species of Sulawesi, based on leaf position in the crown and differences in altitude. Leaf sampling locations were in the Hasanuddin University Educational Forest (507 m asl) and Makassar city (16 m asl). The research variables consisted of: number of stomata, size of stomata, leaf stomata index, and leaf chlorophyll content. The results showed that the highest number of stomata was found in the leaves exposed to the sunlights with 52,900 stomata/mm2 compared to 29,800 stomata / mm2 in shaded leaves. Likewise, the highest chlorophyll content was found in leaves exposed to the sunlights of 0.043 mg/L and shaded leaves of 0.034 mg /L. The difference occurs based on differences in altitude as well. The number of stomata in the lower area was 42,200 stomata/mm2, while in the high area was 57,600 stomata / mm2. The chlorophyll content in the low area was 0.045 mg/L and in the high area it was 0.041.mg/L. The higher a place, the more the number of stomata increases, this is inversely proportional to the size of the stomata and the stomata index, while the number of chlorophylls is not significantly different.

Keywords: Ebony (Diospyros celebica Bakh), leaf stomata, chlorophyll content, altitude, silvicultural prescription

Topic: Plant Breeding and Biotechnology

Plain Format | Corresponding Author (Samuel Arung Paembonan)

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