Sulphide tolerance in coastal halophytes

Havill, D. C.; Ingold, A.; Pearson, Jennifer

doi:10.1007/978-94-009-5524-0_31

Cited by 30 publications

(19 citation statements)

References 11 publications

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“…High mortality to culms and below-ground root and rhizome tissue occurred at a mean interstitial sulphide concentration of 0-63 mM in P. hemitomon, while only minor culm and below-ground mortality was observed in S. alterniflora at 1-13 mm sulphide, indicating a greater sulphide tolerance in the latter species. Havill, Ingold & Pearson (1985) also showed that 86Rb radioisotope uptake was inhibited in F. rubra, A. patula, and P. maritima when suphide was added, suggesting that it may adversely affect transport processes in roots. Hence, the differential growth response of the two species was not due to a greater precipitation of soluble sulphide, as FeS, in the more mineral, higher Fe salt marsh soil compared to the less mineral, lower Fe fresh marsh soil.…”

Section: Discussionmentioning

confidence: 95%

“…These biochemical reductions proceed in a thermodynamic sequence following critical redox potentials (Patrick 1964: Connell & Patrick 1968Turner & Patrick 1968) producing N2, NH4+, Mn2+, Fe2+, H2S and CH4 (Ponnamperuma 1972), many of which may be toxic to wetland flora if they accumulate. Sulphide significantly reduced polyphenol oxidase and external phosphatase activity in two European high marsh species, Atriplex patula L. and Festuca rubra L. (Havill, Ingold & Pearson 1985). Goodman & Williams (1961) measured 02, C02, and alcohol content in Spartina townsendii roots from 'healthy', channel 'die back', and pan 'die back' sites, as an indicator of anaerobic root metabolism.…”

Section: Introductionmentioning

confidence: 99%

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Sulphide as a Soil Phytotoxin: Differential Responses in Two Marsh Species

Koch¹,

Mendelssohn²

1989

The Journal of Ecology

179

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JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact support@jstor.org.. British Ecological Society is collaborating with JSTOR to digitize, preserve and extend access to Journal of Ecology. SUMMARY(1) A glasshouse experiment was conducted to investigate the effects of soil reduction and hydrogen sulphide accumulation on the growth of two marsh species, Spartina alterniflora and Panicuni henuitomon. Three treatmenis were applied to replicated soil cores containing intact vegetation: flooded aerated, flooded non-aerated, and flooded nonaerated with sulphide added.(2) The addition of 10 mM sulphide resulted in significantly less total biomass of S. alterniflora and P. hemitomon. Sulphide significantly reduced culm, root and rhizome biomass in P. hemitonon but only root biomass in S. alterniflora.(3) Paniicuni henlitomoni had no significant difference in total biomass between the aerated and non-aerated treatments, but S. alterniflora total biomass was lower in the aerated treatment than in the non-aerated treatment.(4) Redox potential (mV) in the soil cores of both species was highest in the aerated treatment, intermediate in the non-aerated treatment, and lowest in the sulphide treatment.(5) Spartina alterniflora and P. hemitomon soluble interstitial NH4 + and P043concentrations followed an inverse relationship to redox potential and differences between treatments were highly significant.(6) Root iron concentrations in S. alterniflora were an order of magnitude higher than iron concentrations in leaves of S. alterniiflora and roots and leaves of P. hemitomon. The majority of this root iron in S. alterniflora was associated with root coatings.

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Section: Discussionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Sulphide as a Soil Phytotoxin: Differential Responses in Two Marsh Species

Koch¹,

Mendelssohn²

1989

The Journal of Ecology

179

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“…While the biological roles of DMSP and its cleavage products are not completely understood, some of their proposed functions in algae have included osmoregulation (Dickson et al 1980, Reed 1983a,b, Edwards et al. 1987, 1988), sulfur detoxification (Havill et al 1985), and cryoprotection (Kirst et al 1991, Karsten et al 1992, 1996). The DMSP cleavage reaction may also be involved in an antiherbivore activated defense in U. lactuca (= U. fenestrata ; Hayden and Waaland 2004) from the northeastern Pacific (Van Alstyne et al 2001, Van Alstyne and Houser 2003).…”

Section: Discussionmentioning

confidence: 99%

INTRASPECIFIC VARIATION IN STRESS‐INDUCED HYDROGEN PEROXIDE SCAVENGING BY THE ULVOID MACROALGA ULVA LACTUCA¹

Ross

Alstyne

2007

Journal of Phycology

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We investigated the presence and kinetics of the oxidative stress response in intertidal and subtidal individuals of the ulvoid macroalga Ulva lactuca L. Stress responses, as measured with both enzymatic and fluorescent-based antioxidant assays, differed between individuals collected from a subtidal and an intertidal habitat. Subtidal individuals secreted significantly more hydrogen peroxide (H 2 O 2 ) than intertidal individuals when subjected to osmotic stress or desiccation. The activity of reactive-oxygenscavenging enzymes and the ability to scavenge exogenous H 2 O 2 were lower in subtidal than in intertidal individuals, suggesting that subtidal individuals are less stress tolerant. In vitro experimentation demonstrated that millimolar concentrations of dimethylsulfoniopropionate (DMSP) and its breakdown products could efficiently scavenge H 2 O 2 , with DMSP being a less-effective scavenger than dimethyl sulfide (DMS), acrylic acid, and acrylate. The addition of H 2 O 2 at concentrations of 2.5 mM or greater induced the cleavage of DMSP into DMS and acrylic acid in subtidal individuals. Intertidal individuals were affected in the same manner with the addition of 5 mM H 2 O 2 . There were no differences in the amounts of DMSP cleavage in subtidal and intertidal algae when the algae were subjected to hyposaline conditions. Our data suggest that the oxidative-stress-induced cleavage of DMSP affords products with efficient H 2 O 2 -scavenging abilities. In addition, U. lactuca individuals growing in intertidal habitats are better acclimatized to changing environments and thus have a higher threshold for oxidative stress than conspecifics in subtidal habitats.

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“…Ingold & Havill (1984) found that the addition of 100 µ m sulphide to a sealed water‐culture system did not have an adverse effect on the growth and root development of S. europaea , unlike three other salt marsh species examined; S. europaea was also the only vascular plant rooted in sulphide‐containing sediments on a lower marsh. Havill et al . (1985) similarly did not detect any adverse effects of this concentration of sulphide on its growth and metabolism.…”

Section: Structure and Physiologymentioning

confidence: 99%