Phytochelatins Are Involved in Differential Arsenate Tolerance inHolcus lanatus
| Autor: | Gillian Ainsworth, Wilma M. ten Bookum, Jeanette Hartley-Whitaker, Andrew A. Meharg, Riet Vooijs, Henk Schat |
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| Přispěvatelé: | Ecology and Plant Physiology |
| Rok vydání: | 2001 |
| Předmět: |
Physiology
chemistry.chemical_element Plant Science Biology Poaceae Plant Roots Mass Spectrometry chemistry.chemical_compound Metalloproteins Botany Phytochelatins Genetics Chelation Sulfhydryl Compounds Chromatography High Pressure Liquid Plant Proteins Holcus lanatus Cadmium Dose-Response Relationship Drug Arsenate Phosphate biology.organism_classification Adaptation Physiological Glutathione chemistry Biochemistry Arsenates Phytotoxicity Metalloid Phytochelatin SDG 6 - Clean Water and Sanitation Research Article |
| Zdroj: | Plant Physiology, 299-306. American Society of Plant Biologists STARTPAGE=299;ENDPAGE=306;ISSN=0032-0889;TITLE=Plant Physiology Hartley-Whitaker, J, Ainsworth, F G, Vooijs, H, ten Bookum, W M, Schat, H & Meharg, A A 2001, ' Phytochelatins are involved in differential arsenate tolerance in Holcus lanatus. ', Plant Physiology, pp. 299-306 . https://doi.org/10.1104/pp.126.1.299 |
| ISSN: | 1532-2548 0032-0889 |
| DOI: | 10.1104/pp.126.1.299 |
| Popis: | Arsenate tolerance is conferred by suppression of the high-affinity phosphate/arsenate uptake system, which greatly reduces arsenate influx in a number of higher plant species. Despite this suppressed uptake, arsenate-tolerant plants can still accumulate high levels of As over their lifetime, suggesting that constitutive detoxification mechanisms may be required. Phytochelatins are thiol-rich peptides, whose production is induced by a range of metals and metalloids including arsenate. This study provides evidence for the role of phytochelatins in the detoxification of arsenate in arsenate-tolerant Holcus lanatus. Elevated levels of phytochelatin were measured in plants with a range of tolerance to arsenate at equivalent levels of arsenate stress, measured as inhibition of root growth. The results suggest that arsenate tolerance in H. lanatus requires both adaptive suppression of the high-affinity phosphate uptake system and constitutive phytochelatin production. |
| Databáze: | OpenAIRE |
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