Species-specific enzymatic tolerance of sulfide toxicity in plant roots

Copyright © 2015 Elsevier Masson SAS. All rights reserved.

Bibliographische Detailangaben
Veröffentlicht in:Plant physiology and biochemistry : PPB. - 1991. - 88(2015) vom: 29. März, Seite 36-41
1. Verfasser: Martin, Nicole M (VerfasserIn)
Weitere Verfasser: Maricle, Brian R
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2015
Zugriff auf das übergeordnete Werk:Plant physiology and biochemistry : PPB
Schlagworte:Journal Article Research Support, N.I.H., Extramural Research Support, Non-U.S. Gov't Alcohol dehydrogenase Cytochrome c oxidase Estuarine plants Flooding-sensitive plants Flooding-tolerant plants Respiration Sulfide mehr... Plant Proteins Sulfides Water 059QF0KO0R Alcohol Dehydrogenase EC 1.1.1.1 Electron Transport Complex IV EC 1.9.3.1 sodium sulfide YGR27ZW0Y7
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245 1 0 |a Species-specific enzymatic tolerance of sulfide toxicity in plant roots 
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520 |a Copyright © 2015 Elsevier Masson SAS. All rights reserved. 
520 |a Toxic effects of sulfide come from a poisoning of a number of enzymes, especially cytochrome c oxidase, which catalyzes the terminal step in mitochondrial aerobic respiration. Despite this, some estuarine plants live in sulfide-rich sediments. We hypothesized estuarine and flooding-tolerant species might be more tolerant of sulfide compared to upland species, and this was tested by measures of root cytochrome c oxidase and alcohol dehydrogenase activities in extracts exposed to sulfide. Enzyme activities were measured in 0, 5, 10, 15, and 20 μM sodium sulfide, and compared among 17 species of plants. Activities of alcohol dehydrogenase and cytochrome c oxidase were both reduced by increasing sulfide concentration, but cytochrome c oxidase was more sensitive to sulfide compared to alcohol dehydrogenase. Activities of cytochrome c oxidase were reduced to near zero at 5-10 μM sulfide whereas alcohol dehydrogenase activities were only reduced by about 50% at 10 μM sulfide. All species were sensitive to increasing sulfide, but to different degrees. Cytochrome c oxidase in flooding-sensitive species was decreased to near zero activity at 5 μM sulfide, whereas activities in some flooding-tolerant species were still detectable until 15 μM sulfide. Cytochrome c oxidase activities in some estuarine species were low even in the absence of sulfide, perhaps an adaptation to avoid sulfide vulnerability in their native, sulfide-rich habitat. This illustrates the potent metabolic effects of sulfide, and this is the first demonstration of varying sensitivities of cytochrome c oxidase to sulfide across organisms, making these data of novel importance 
650 4 |a Journal Article 
650 4 |a Research Support, N.I.H., Extramural 
650 4 |a Research Support, Non-U.S. Gov't 
650 4 |a Alcohol dehydrogenase 
650 4 |a Cytochrome c oxidase 
650 4 |a Estuarine plants 
650 4 |a Flooding-sensitive plants 
650 4 |a Flooding-tolerant plants 
650 4 |a Respiration 
650 4 |a Sulfide 
650 7 |a Plant Proteins  |2 NLM 
650 7 |a Sulfides  |2 NLM 
650 7 |a Water  |2 NLM 
650 7 |a 059QF0KO0R  |2 NLM 
650 7 |a Alcohol Dehydrogenase  |2 NLM 
650 7 |a EC 1.1.1.1  |2 NLM 
650 7 |a Electron Transport Complex IV  |2 NLM 
650 7 |a EC 1.9.3.1  |2 NLM 
650 7 |a sodium sulfide  |2 NLM 
650 7 |a YGR27ZW0Y7  |2 NLM 
700 1 |a Maricle, Brian R  |e verfasserin  |4 aut 
773 0 8 |i Enthalten in  |t Plant physiology and biochemistry : PPB  |d 1991  |g 88(2015) vom: 29. März, Seite 36-41  |w (DE-627)NLM098178261  |x 1873-2690  |7 nnns 
773 1 8 |g volume:88  |g year:2015  |g day:29  |g month:03  |g pages:36-41 
856 4 0 |u http://dx.doi.org/10.1016/j.plaphy.2015.01.007  |3 Volltext 
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