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Research on weed species
for phytoremediation of boron polluted soil
Mehmet Aydın* and Fulya Çakır
Adnan Menderes University, Faculty of
Agriculture, Department of Soil Science and Plant Nutrition,
09100 Aydın, Turkey.
*Corresponding author. E-mail:
maydin@adu.edu.tr.
Accepted 20 August, 2009 |
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This research was aimed to investigate the
application of weed species for
phytoremediation
of soil polluted with boron. A greenhouse experiment was
conducted to study the effect of increasing boron (B)
application on the growth and B uptake of common weed
species, Sorghum halepense L. Pers., Cyperus
rotundus L., Cynodon dactylon L. Pers.,
Amaranthus retroflexus L., Echinochloa Cruss-gali
L. and Chenopodium album L. Four levels of B (0, 10,
20 and 30 mg kg-1 soil) were applied to six weed
species. Results revealed that, shoot and root dry weight of
species decreased with increasing B application. There was a
considerable variation among weed species in terms of their
responses to B applications. The species having rhizomes
such as S. halepense, C. rotundus and C.
dactylon Pers. were more tolerant to the B toxicity than
species growing from the seeds of A. retroflexus,
E. Cruss-gali and C. album. The shoots contained
higher concentration of B than the roots. Boron content of
weed species was notably different and was affected by B
applications. The high aboveground biomass and B
accumulation in the shoot of any of weed species used in the
experiment cannot be considered a potential parameter
for the phytoextraction of B.
Key words:
Boron toxicity, tolerance, dry weight, hyperaccumulator. |
