KEMAMPUAN DAUN ANGSANA (Pterocarpus indicus Willd.) DAN MAHONI (Swietenia macrophylla King.) DALAM PENEMPELAN DEBU DI KOTA BANDUNG

• Main Author: Jerdy Kusuma, Kennard
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/42756
• Institution: Institut Teknologi Bandung

Particulate matter (PM) produced by vehicles can harm environment and human health. Road side trees in urban area such as angsana (Pterocarpus indicus) and mahogany (Swietenia macrophylla) can decrease particulate from atmosphere by deposition it on leaves surface. Dust deposition on the upper surface can affect leaf properties such as chlorophyll and carotenoids. Therefore, this study was conducted to compare the ability of leaves of P. indicus and S. macrophylla to deposit dust in Bandung and to evaluate respond of those trees on PM, especially chlorophyll and carotenoids content. Three trees each species from three research areas (Pahlawan, Diponegoro, and Dipatiukur Street) were selected, then three leaves from each species were sampled twice in a week for one-month sampling period. Dust deposition on the leaf surface is collected by sweeping the leaf surface using a brush and then weighed using analytical scales The leaf area is measured with Petiole application using a camera from a smartphone. Total chlorophyll and carotenoids were obtained by measuring the absorbance using a spectrophotometer. Differences in the dust deposition per leaf blade from each species were analyzed by One-Way ANOVA Test (Analysis of Variance) with 95% confidence interval (p-value <0.05). The correlation between dust deposition and leaf area, total chlorophyll, and carotenoids was analyzed by Pearson Correlation Test. The results of ANOVA test showed that there were not significant differences between the two species in dust deposition per cm2 leaf area (P. indicus= 0,033 ± 0,017a mg/cm2; S. macrophylla= 0,034 ± 0,017a mg/cm2). However, there were significant differences if based on the leaf area size between P. indicus with leaf area 233,86 cm2 (7.77 ± 5.22a mg per strand) and S. macrophylla with leaf area 414,65 cm2 (14.05 ± 9.09b mg per strand) (p= 0,000). S. macrophylla tree which has wider leaf area can deposite more dust than P. indicus. This shows that there is a close correlation between leaf area and the ability of plants to deposite dust on angsana (Pearson Correlation (PC)= 0,514) and mahagony (PC= 0,491). However, the data of total chlorophyll (angsana, p= 0,249; PC= 0,138 & mahagony, p= 0,093; PC= 0,199) and carotenoids (angsana, p= 0,830; PC= 0,026 & mahagony, p= 0,22; PC= 0,146) did not show a correlation with the deposition of dust in both types of species.