Biotransfer possibilities of selenium from plants used in phytoremediation

Posibilidades de Biotransferencia de Selenio de Plantas Utilizadas en Fitoremediación

Bañuelos, G.S. and Vickerman, D.B. and Trumble, J.T. and Shannon, M.C. and Davis, C.D. and Finley, J.W. and Mayland, H.F. (2002) Biotransfer possibilities of selenium from plants used in phytoremediation. International Journal of Phytoremediation. 4(4):315-329.

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Abstract

We are investigating the biotransfer of accumulated Se by the plant in several
phytoremediation systems. In study I, we evaluated the biotransfer of Se from Indian
mustard, a Brassica species, to the insect-cabbage looper (Trichoplusia ni); mortality,
deterrence, and biomagnification of Se were examined. We determined that
feeding behavior of food chain consumers was affected not only by the plant
concentration of Se, but also by the mobility of the insects and choice of feed
available. In study II, we examined the survival and development of beet armyworm
(Spodoptera exigua) fed Se-enriched plant tissues from different lines of saltbush
(Atriplex spp.) After feeding on lines of saltbush that produced high biomass and
accumulated high concentrations of Se, insect growth and survival was reduced. In
studies III, IV, and V, lambs, dairy cows, and rabbits were fed Se-enriched Brassica
and Medicago (alfalfa) plants as part of their feed ration. None of the tested animals
exhibited any Se toxicity symptoms, but they had increased levels of Se in most
tissues sampled (e.g., organs, blood, urine, feces), excluding milk. In study VI, we
evaluated biotransfer of Se from broccoli to rats to determine efficacy of Se for
reducing colon cancer. We found that Se-enriched plant material was more effective
than inorganic sources of Se for preventing precancerous colon lesions. Results from
all studies clearly show that Se absorbed by plants can be transferred biologically in
an intentional or unintentional manner to insects and animals.

Item Type:	Article
NWISRL Publication Number:	1086
Subjects:	Mass Import - unclassified
Depositing User:	Dan Stieneke
Date Deposited:	20 Nov 2010 21:50
Last Modified:	09 Nov 2016 18:27
Item ID:	145
URI:	https://eprints.nwisrl.ars.usda.gov/id/eprint/145