| dc.description.abstract | The research was conducted since January until June 2023 at Laboratorium
Fisiologi Tumbuhan dan Kultur Jaringan, Laboratorium Mikrobiologi, Fakultas
Matematika dan Ilmu Pengetahuan Alam and UPT. Laboratorium Penelitian Terpadu,
Universitas Sumatera Utara. The purpose of this research was to analyze and to
compare the chlorophyll content, the lead (Pb), the stomatal density, and the leaf area
of calabur leaves (Muntingia calabura L.) at four different locations in Medan, to
analyze the correlation between lead content and the total chlorophyll content and the
stomatal density of calabur leaves, and also to analyze the correlation between stomatal
density of calabur leaves and leaf area. Lead content on Jalan Pulau Sumatera (0,7
mg/L) was significantly differ from Jalan Gatot Subroto (0,47 mg/L). Lead content at
Jalan Letjen Jamin Ginting (0,15 mg/L) and Jalan Dr. A. Sofyan (0,16 mg/L) did not
significantly different. The chlorophyll a, chlorophyll b, and total chlorophyll content
of calabur leaves did not significant different. Chlorophyll a content of calabur leaves
from highest to lowest found on Jalan Letjen Jamin Ginting (0,25 mg/L), Jalan Dr. A.
Sofyan (0,25 mg/L), Jalan Gatot Subroto (0,24 mg/L), and Jalan Pulau Sumatra (0,23
mg/L). While chlorophyll b content from highest to lowest was on Jalan Letjen Jamin
Ginting (0,45 mg/L), Jalan Dr. A. Sofyan (0,4 mg/L), Jalan Gatot Subroto (0,36 mg/L),
and Jalan Pulau Sumatera (0,33 mg/L), respectively. Total chlorophyll content from
highest to lowest was on Jalan Letjen Jamin Ginting (0,71 mg/L), Jalan Dr. A. Sofyan
(0,66 mg/L), Jalan Gatot Subroto (0,6 mg/L), and Jalan Pulau Sumatera (0,56 mg/L).
The stomatal density of calabur leaves showed no significantly different, which was
from highest to lowest was at Jalan Pulau Sumatera (180 stomata/mm2), Jalan Dr. A.
Sofyan (163,3 stomata/mm2), Jalan Letjen Jamin Ginting (148 stomata/mm2), and
Jalan Gatot Subroto (141,6 stomata/mm2). The leaf area of calabur leaves at Jalan
Gatot Subroto (28,3 cm2) was significantly different from the one on Jalan Letjen
Jamin Ginting (23,3 cm2). Leaf area of calabur leaves at Jalan Dr. A. Sofyan (19 cm2)
did not significantly different to the Jalan Pulau Sumatera (18 cm2). Lead content was
correlate significantly to the total chlorophyll content and the stomatal density of
calabur leaves on Jalan Pulau Sumatra. Stomatal density of calabur leaves did not
correlate significantly with the leaf area at four different locations in Medan | en_US |
