Abstract
Spartina alterniflora has been reported to lose significant amounts of oxygen to its rhizosphere with potentially important effects on salt-marsh biogeochemical cycling and plant productivity. The potential significance of this oxidative pathway was evaluated using laboratory split-chamber experiments to quantify oxygen loss from intact root systems under a wide variety of pre-treatment and incubation conditions including antibiotics to inhibit microbial respiration. The aerenchyma system of S. alterniflora was found to transport O2, N2, Ar, and CH4 from above-ground sources to its below-ground roots and rhizomes. While non-respiratory gases were observed to move from the lacunae to water bathing the root systems, net O2 loss did not occur; instead oxygen present outside of the roots/rhizomes was consumed. Net oxygen loss was found when resistance to gas transport was reduced in the lacunae-rhizosphere pathway by placing the root systems in a gas phase and when plant respiration was significantly reduced. Root system respiration appeared to be the major variable in the plant oxygen balance. When root and rhizome respiration was inhibited using poisons or lowered by cooling, the oxygen deficit was greatly reduced and oxygen loss was indicated. The effect of seasonal temperature changes on root system “oxygen deficit” presents a possible explanation as to why Spartina produces root systems with respiration rates that cannot be supported by gas transport. Overall, while oxygen loss from individual plant roots is likely, integrating measured root system oxygen loss with geochemical data indicates that the mass amount of oxygen lost from S. alterniflora root systems is small compared to the total oxygen balance of vegetated salt marsh sediments.
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References
Arenovski AL, Howes BL (1992) Lacunal allocation and gas transport capacity in the salt marsh grass Spartina alterniflora. Oecologia 90:316–322
Armstrong J, Armstrong W, Beckett PM (1992) Phragmites australis: Venturi- and humidity-induced pressure flows enhance rhizome aeration and rhizosphere oxidation. New Phytol 120:197–207
Armstrong W (1964) Oxygen diffusion from the roots of some British bog plants. Nature 204:801
Armstrong W (1971) Radial oxygen losses from intact rice roots as affected by distance from the apex, respiration and waterlogging. Physiol Plant 25:192
Armstrong W (1978) Root aeration in the wetland condition. In: Hook DD, Crawford RMM (eds) Plant life in anaerobic environments. Ann Arbor Science, Ann Arbor, Michigan, pp 269–298
Bedford BL, Bouldin DR, Beliveau BD (1991) Net oxygen and carbon-dioxide balances in solutions bathing roots of wetland plants. J Ecol 79:943–959
Brix H, Sorrell BK, Orr PT (1992) Internal pressurization and convective gas flow in some emergent freshwater macrophytes. Limnol Oceanogr 37:1420–1433
Carlson PR Jr, Forrest J (1982) Uptake of dissolved sulfide by Spartina alterniflora: evidence from natural sulfur isotope abundance ratios. Science 216:633–635
Dacey JWH, Howes BL (1984) Water uptake by roots controls watertable movement and sediment oxidation in short Spartina marsh. Science 224:487–489
Gleason ML, Dunn EL (1982) Effects of hypoxia on root and shoot respiration of Spartina alterniflora. In: Kennedy VS (ed) Estuarine comparisons. Academic Press, New York, pp 243–251
Gleason ML, Zieman JC (1981) Influence of tidal inundation on the internal oxygen supply of Spartina alterniflora and Spartina patens. Est Coast Shelf Sci 13:47–57
Goehringer DD (1985) Drainage of water, dissolved organic carbon and ammonium through creekbank salt marsh sediments. M. S. Thesis, Boston University
Howes BL, Howarth RW, Valiela I, Teal JM (1981) Oxidation-reduction potentials in a salt marsh: spatial patterns and interactions with primary production. Limnol Oceanogr 26:350–360
Howes BL, Dacey JWH, King GM (1984) Carbon flow through oxygen and sulfate reduction pathways in salt marsh sediments. Limnol Oceanogr 29:1037–1051
Howes BL, Dacey JWH, Wakeham SG (1985a) Effects of sampling technique on measurements of porewater constituents in salt marsh sediments. Limnol Oceanogr 30:221–227
Howes BL, Dacey JWH, Teal JM (1985b) Annual carbon mineralization and belowground production of Spartina alterniflora in a New England salt marsh. Ecol 66:595–605
Howes BL, Dacey JWH, Goehringer DD (1986) Factors controlling the growth form of Spartina alterniflora: feedbacks between above-ground production, sediment oxidation, nitrogen and salinity. J Ecol 74:881–898
Hwang YH, Morris JT (1991) Evidence for hygrometric pressurization in the internal gas space of Spartina alterniflora. Plant Physiol 69:166–171
Jordan TE, Correll DL (1985) Nutrient chemistry and the hydrology of interstitial water in brackish tidal marshes of Chesapeake Bay. Est Coast Shelf Sci 21:45–55
Joshi MM, Hollis JP (1977) Interaction of Beggiatoa and rice plant detoxification of hydrogen sulfide in the rice rhizosphere. Science 195:179–180
Kawase M (1976) Ethylene accumulation in flooded plants. Physiol Plant 36:236–241
King GM, Klug MJ, Wiegert RG, Chalmers AG (1982) Relation of soil water movement and sulfide concentration to Spartina alterniflora production Georgia salt marsh. Science 218:61–63
Koch MS, Mendelssohn IA, McKee KL (1990) Mechanism for the hydrogen-sulfide-induced growth limitation in wetland macrophytes. Limnol Oceanogr 35:399–408
Luther GW, Giblin AE, Howarth RW, Ryans RA (1982) Pyrite and oxidized iron mineral phases formed from pyrite oxidation in salt marsh and estuarine sediments. Geochim Cosmochim Acta 46:2665–2669
Mendelssohn IA, McKee KL (1988) Spartina alterniflora die-back in Louisiana: timecourse investigation of soil waterlogging effects. J Ecol 76:509–521
Mendelssohn IA, Postek MT (1982) Elemental analysis of deposits on the roots of Spartina alterniflora, Loisel. Am J Bot 69:904–912
Mendelssohn IA, McKee KL, Patrick WH Jr (1981) Oxygen deficiency in Spartina alterniflora roots: metabolic adaptation to anoxia. Science 214:439–441
Morris JT, Dacey JWH (1984) Effects of oxygen on ammonium uptake and root respiration by Spartina alterniflora. Am J Bot 71:979–985
Reedy KR, Patrick WH Jr, Lindau CW (1989) Nitrification-denitrification at the plant root-sediment interface in wetlands. Limnol Oceanogr 34:1004–1013
Steudler PA, Peterson BJ (1984) Contribution of gaseous sulphur from salt marshes to the global sulphur cycle. Nature 311:455–457
Teal JM, Kanwisher J (1961) Gas exchange in a Georgia salt marsh. Limnol Oceanogr 6:388–399
Teal JM, Kanwisher J (1966) Gas transport in the marsh grass, Spartina alterniflora. J Exp Bot 17:355–361
Valiela I, Teal JM, Persson NY (1976) Production and dynamics of experimentally enriched salt marsh vegetation: belowground biomass. Limnol Oceanogr 21:245–252
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Howes, B.L., Teal, J.M. Oxygen loss from Spartina alterniflora and its relationship to salt marsh oxygen balance. Oecologia 97, 431–438 (1994). https://doi.org/10.1007/BF00325879
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DOI: https://doi.org/10.1007/BF00325879