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Planta

Title:		"X-ray absorption spectroscopy study shows that the rapid selenium volatilizer, pickleweed (Salicornia bigelovii Torr.), reduces selenate to organic forms without the aid of microbes"
Author(s):		Lee A; Lin ZQ; Pickering IJ; Terry N;
Address:		"Department of Plant and Microbial Biology, University of California, Berkeley 94720-3102, USA"
Journal Title:		Planta
Year:		2001
Volume:		213
Issue:		6
Page Number:		977 - 980
DOI:		10.1007/s004250100574
ISSN/ISBN:		0032-0935 (Print) 0032-0935 (Linking)
Abstract:		"In many plant species, selenium (Se) volatilization is limited by the reduction of selenate and its chemical conversion to organic Se compounds, a process that may be facilitated by rhizosphere microbes. This study was conducted to determine if pickleweed (Salicornia bigelovii Torr.), which is characterized by having high rates of Se volatilization from selenate, is able to reduce selenate into organic forms of Se axenically, or whether it requires the presence of microbes. X-ray absorption spectroscopy analysis showed that shoots and roots of pickleweed plants supplied with 50 microM selenate accumulated Se predominantly in organic Se forms (about 65-75% of the total accumulated Se), regardless of whether the plants were grown axenically or in the presence of microbes. The results suggest that, unlike other species for which selenate reduction appears to be rate limiting. e.g. Indian mustard (Brassica juncea L.) and broccoli (Brassica oleracea L.), pickleweed is unusual in that it has an enhanced capacity to reduce selenate to organic forms that is independent of the presence of rhizosphere microbes"
Keywords:		Chenopodiaceae/drug effects/*metabolism/microbiology Organometallic Compounds/metabolism *Organoselenium Compounds Plant Roots/drug effects/metabolism/microbiology Plant Shoots/drug effects/metabolism/microbiology Selenic Acid Selenium/metabolism Selenium;
Notes:		"MedlineLee, A Lin, Z Q Pickering, I J Terry, N eng Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. Research Support, U.S. Gov't, P.H.S. Germany 2001/11/28 Planta. 2001 Oct; 213(6):977-80. doi: 10.1007/s004250100574"