| Pak. J. Bot., 37(2): 361-371, 2005. | Back to Contents | ||||
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Updated: 09-07-09 | ||||
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SOME ELEMENTAL CONCENTRATIONS IN THE ACORNS OF TURKISH QUERCUS L. (FAGACEAE) TAXA TAMER ÖZCAN AND GÜLRIZ BAYÇU
Abstract:
Quercus acorns from 16 taxa grown naturally in different regions
of Turkey were studied to detect some elemental concentrations in order
to observe different accumulation levels. Total concentrations of K,
Fe, Zn, Cu, Cr, Ni and Co in the acorns were determined in acid digests
by atomic absorption spectrophotometry. No significant differences in
section level were observed, but differences at specific and infraspecific
levels were significant (P<0.001) for all examined elements. Fe concentrations
were positively correlated with Zn and Cu (P<0.02) in Section Quercus,
but only with Zn (P<0.05) in Section Cerris. Remarkable distinctions
of Fe, Zn, Cu and Ni concentrations in spesific and subspesific levels
were observed. Fe and Zn concentrations were detected high in the acorns
of Q. robur subsp. robur, Q. petraea subsp. petraea,
Q. infectoria subsp. boissieri and Q. cerris var.
cerris. In general, Cu, Cr, Ni and Co concentrations were low,
but the concentrations of Cu in Q. petraea subsp. petraea
and Q. libani; Ni in Q. pubescens, Q. cerris var.
austriaca and Q. ilex; Co in Q. frainetto and
Q. coccifera and Cr in Q. robur subsp. robur, Q. frainetto,
Q. vulcanica were found in higher levels. Considerably different
concentrations of Fe, Zn and Cu especially in the related taxa may be
evaluated for the taxonomic delimitation additionally as a characteristic
tool reflecting the constant genetical tolerance of accumulation.
Department of Biology, Division of Botany, Faculty of Science, Istanbul
University, 34460 Istanbul, Turkey. |
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