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Sains Malaysiana
39(3)(2010): 347–352
Effects
of Metal-contaminated Soils on the Accumulation of Heavy Metals in
Different
Parts of Centella asiatica: A Laboratory Study
(Kesan
Penimbunan Logam Berat di dalam Pelbagai Bahagian Centella asiatica dari
Tanah yang Tercemar dengan Logam Berat: Satu Kajian dalam Makmal)
C.K.
Yap*, M. R. Mohd Fitri & Y. Mazyhar
Department
of Biology
Faculty
of Science
Universiti
Putra Malaysia
43400
UPM, Serdang, Selangor D. E
Malaysia
S.G.
Tan
Department
of Cell and Molecular Biology
Faculty
of Biotechnology and Bimolecular Sciences
Universiti
Putra Malaysia
43400
UPM, Serdang, Selangor D. E
Malaysia
Diserahkan:
21 Januari 2009 / Diterima: 19 Oktober 2009
ABSTRACT
Centella
asiatica is widely used as a medicinal plant in Malaysia and other parts of
the world. In the present study, the growth and uptake of heavy metal by C.
asiatica were determined based on the plant exposure to different treatment
of metal-contaminated soils under laboratory conditions. Heavy metals uptake in
different parts of the plants namely roots, stems and leaves were determined.
In general, it was found that the metal uptake capacity followed the order:
roots > stems > leaves. Since a close positive relationship was
established between the concentrations of metal accumulated in different parts
of the plant and the metal levels in the most contaminated soil, C.
asiatica has the potential of being used as a biomonitoring plant for heavy
metal pollution in the polluted soils.
Keywords: Centella asiatica; laboratory
study; metal-contaminated soils
ABSTRAK
Centella
asiatica merupakan tumbuhan yang digunakan sebagai ubat secara meluas di
Malaysia dan di seluruh pelusuk dunia. Dalam kajian ini, pertumbuhan dan penyerapan
logam berat oleh C. asiatica telah ditentukan berdasarkan kepada
pendedahan tumbuhan tersebut terhadap pelbagai treatmen dengan tanah yang
tercemar dengan logam berat di bawah keadaan laboratori. Penyerapan logam berat
dalam bahagian berlainan tumbuhan telah ditentukan di akar, batang dan daun.
Secara umumnya, didapati bahawa kapasiti penyerapan logam berat dalam tumbuhan
ini adalah mengikut urutan: akar> batang> daun. Berdasarkan kepada
hubungan positif yang rapat antara penimbunan logam berat di bahagian-bahagian
berlainan tumbuhan ini dengan kandungan logam berat dalam tanah yang paling
tercemar, C. asiatica amat berpotensi sebagai biopemonitoran bagi
pencemaran logam berat di dalam tanah yang tercemar.
Kata kunci: Centella asiatica; kajian
makmal; tanah tercemar logam berat
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*Pengarang untuk surat-menyurat; email: yapckong@hotmail.com
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