Sains
Malaysiana 41(4)(2012): 395-401
Mercury Distribution in an Invasive
Species (Asystasia gangetica) from Peninsular Malaysia
(Taburan Merkuri di dalam spesies invasif (Asystasia
gangetica) dari Semenanjung Malaysia)
W.
Chew & C.K. Yap*
Department
of Biology, Faculty of Science, Universiti Putra Malaysia
43400
UPM Serdang, Selangor D.E., Malaysia
A.
Ismail & M.P. Zakaria
Centre
of Excellence for Environmental Forensics, Faculty of Environmental Studies
Universiti
Putra Malaysia, 43400 UPM Serdang, Selangor D.E., Malaysia
S.G.
Tan
Department
of Cell and Molecular Biology, Faculty of Biotechnology and Biomolecular
Science
Universiti
Putra Malaysia, 43400 UPM Serdang, Selangor, D.E., Malaysia
Diserahkan:
26 Mei 2011 /Diterima: 8 September 2011
ABSTRACT
In
this study, the Hg levels in eight parts of Asystasia gangetica (L.) T. Anderson collected
from 14 sites were determined using a Mercury Atomizer MA-1S and a Mercury
Detector MD-1. It was found that the ranges for all the parts were 3.21-18.2 μg/kg
dry weight for flowers, 1.29-11.2 μg/kg dry weight forstalks, 0.32- 29.4
μg/kg dry weight for seeds, 0.87-10.2 μg/kg dry weight for pericarps,
1.45-18.1 μg/kg dry weight for remainders, 11.8-68.2 μg/kg dry weight
for leaves, 0.73-20.9 μg/kg dry weight for stems, and 3.40-33.1 μg/kg
dry weight for roots. The overall Hg accumulation pattern in decreasing
concentrations was leaf > root > flower > flower remains > stalk
> stem > pericarp > seed. This study provided the background levels of
Hg in this non-native invasive weed species in Malaysia. However, further
studies
are
needed to confirm it as a biomonitors of Hg in this region.
Keywords: A. gangetica;
biomonitor, Hg; Peninsular Malaysia
ABSTRAK
Kajian
ini menentukan kepekatan Hg pada lapan bahagian Asystasia gangetica (L.) T.
Anderson yang dikumpul dari 14 tempat kajian. Pengatom Merkuri MA-1S dan
Pengesan Merkuri MD-1 digunakan untuk menentukan kepekatan Hg pada setiap
sampel dalam kajian ini. Nilai kepekatan Hg yang terdapat di dalam setiap
bahagian ialah 3.21-18.2 μg/kg berat kering (bunga), 1.29-11.2 μg/kg
berat kering (tangkai bunga), 0.32-29.4 μg/kg berat kering (biji-benih),
0.87-10.2 μg/kg berat kering (Perikarpa), 1.45-18.1 μg/kg berat
kering (sisa-sisa bunga), 11.8-68.2 μg/kg berat kering (daun), 0.73-20.9
μg/kg berat kering (batang), dan 3.40-33.1 μg/kg berat kering (akar).
Pola kepekatan Hg keseluruhan dalam
kajian
ini ialah mengikut urutan daun > akar > bunga > sisa-sisa bunga >
tangkai > batang > perikarpa > biji-benih. Kajian ini telah memberikan
tahap latar belakang kepekatan Hg di dalam spesies invasif ini. Walau
bagaimanapun, kajian lanjutan diperlukan untuk mengesahkan bahawa spesies ini
adalah biomonitor yang sesuai di kawasan ini.
Kata kunci: A. gangetica; biomonitor; Hg; Semenanjung
Malaysia
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*Pengarang untuk surat-menyurat;
email: yapckong@hotmail.com
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