THE TRANSPORT OF CALCIUM and OTHER CATIONS IN SUBMERGED AQUATIC PLANTS

Lowenhaupt, Benjamin

doi:10.1111/j.1469-185x.1956.tb01555.x

Cited by 43 publications

(15 citation statements)

References 55 publications

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“…Reductions in ambient cation levels have been demonstrated in the microhabitat beneath some photosynthetically active hydrophytes (Lowenhaupt 1956, Prins et al 1982c. Reductions in ambient cation levels have been demonstrated in the microhabitat beneath some photosynthetically active hydrophytes (Lowenhaupt 1956, Prins et al 1982c.…”

Section: Identification Of the Settling Factormentioning

confidence: 97%

Mechanism and Adaptive Significance of Substrate Selection by a Sessile Rotifer

Wallace¹,

Edmondson²

1986

Ecology

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We examined the nature and adaptive significance of substrate selection by larvae of the sessile rotifer Collotheca graci/ipes. In a small artificial pond the preferred substrate was the anatomical undersurfaces (abaxial) of Elodea canadensis leaves, although four other macrophytes were present (Ceratophyllum demersum, Lemna minor, Myriophyllum spicatum, and Nymphaea odorata). Density of adults on Elodea at times reached >6 individuals/mm 2 , with >98% attached to abaxial surfaces. However, larvae offered plants in pairwise combinations selected substrates in the following order: Lemna > Elodea > Myriophyllum > Nymphaea. No larval loyalty to parental substrate was exhibited. Larvae preferentially selected abaxial over adaxial surfaces of Elodea leaves (91% on abaxial) in continuous illumination experiments, but the larvae did not discriminate between the two surfaces in total darkness (48% on abaxial).In the absence of a plant substrate, cell debris from any one of four aquatic and two terrestrial plant species induced larval settlement on the bottom of plastic well-depressions. Activity could not be attributed to carbohydrate, lipid, nucleic acid, or protein moieties within these extracts. However, alpha-amylase induced rapid larval settlement in the depressions. In the presence of this calcium chelator, larvae did not distinguish between ad-and abaxial leaf surfaces to the same degree as without the enzyme. Phospholipase-C and EDT A induced similar effects. Larval preference for abaxial surfaces could be reduced slightly when pH was stabilized at < 7 .0. Because living Elodea in neutral-to-alkaline water can remove Ca+ 2 from beneath its leaves and release it from adaxial surfaces while photosynthesizing, we hypothesized that larvae initiate substrate selection activities on any surface when they are in microhabitats having ambient Ca+ 2 concentrations below a threshold concentration. Shortterm, in vitro growth experiments showed that rotifers attached to abaxial surfaces of Elodea leaves grew significantly taller and produced more eggs per female than those which had been induced to settle on adaxial surfaces.

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Section: Identification Of the Settling Factormentioning

confidence: 97%

Mechanism and Adaptive Significance of Substrate Selection by a Sessile Rotifer

Wallace¹,

Edmondson²

1986

Ecology

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“…The excretion of OH -ions from the adaxial leaf surfaces is accompanied by cations (e .g . Lowenhaupt, 1956 ;Raven, 1971) . Although there are few detailed reports of other divalent cations being excreted along with Ca 2 + and OH -in Potamogeton spp .…”

Section: Modern Sedimentsmentioning

confidence: 99%

Chemical and isotopic composition of karstic lakes in Jamaica, West Indies

Holmes

Street-Perrott

Heaton³

et al. 1995

Hydrobiologia

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Lakes in the limestone region of Jamaica exhibit a range of chemical characteristics that reflect varying inputs from precipitation, surface runoff and groundwater, together with the subsequent evolution of the water within the limnic environment . Detailed spatial and temporal sampling was conducted on one lake, Wallywash Great Pond . Chemical data, together with D/H, 180/160 13C/12C and 87 Sr/86 Sr ratios confirm that the karstic spring waters entering the lake evolve chemically through degassing, mixing with rainfall and runoff, biogenic decalcification (resulting mainly from bicarbonate assimilation by the high biomass of submerged macrophytes), and evaporation . Modern carbonate sedimentation in Wallywash Great Pond is largely of high-Mg calcite . This is consistent with Mg/Ca molar ratios >2 within much of the lake . However, aragonite forms on the adaxial leaf surfaces of Potamogeton spp . This may be explained either as a result of locally elevated Mg concentrations or a high degree of supersaturation favouring very rapid carbonate precipitation . Two small lakes to the north of Wallywash Great Pond show minor influence of the Na-Cl dominated coastal aquifer, suggesting that coastal lakes are sensitive to variations in the boundary between fresh and brackish groundwater caused by changes in climate or sea level . Their 13 C/ 12C ratios are strongly influenced by biogenic CO2 derived from plant respiration or decay .

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“…Experiments on various species of submerged macrophytes (Lowenhaupt, 1956 ;Steeman Nielsen, 1951) have shown shoots are the main organs of nutrient absorption and that roots act mainly as anchors (Olsen, 1953Sutcliffe, 1962 . Spence (1967) concluded that both hypotheses may be partly correct .…”

Section: Concentrations Of Investigated Metals and As Inmentioning

confidence: 99%

Effects of mine effluent on uptake of Co, Ni, Cu, As, Zn, Cd, Cr and Pb by aquatic macrophytes

Mudroch¹,

Capobianco²

1979

Hydrobiologia

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Concentrations of Ni, Co, Cu, Pb, Zn, Cd, Cr and As were determined in aquatic sediments, water and macrophytes collected from a fluvial system, contaminated by mine effluents . Myriophyllum verticillatum collected in May below the trace element point source accumulated 169 µg/ g of Ni, 86o t'g1g Of CO, 37 A919 Of Cu, 31 µg/ g of Pb, 92µg/ g of Zn, 6 .9µg/ g of Cr and 1,2oo µg/ g of As (concentrations in dry weight) . The aquatic macrophytes Nymphaea odoratae and Pontederia cordata accumulated the investigated trace elements to a much lesser extent . The concentrations of trace elements in Myriophyllum verticillatum decreased from May to August . Correlations were found between the concentrations of total Ni, Co and Cu in the bottom sediment and in the submerged macrophytes . However, there was no correlation between the amounts of these trace elements extractable by 0.5 N HCl from the sediments and the concentrations in the macrophytes .

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THE TRANSPORT OF CALCIUM and OTHER CATIONS IN SUBMERGED AQUATIC PLANTS

Cited by 43 publications

References 55 publications

Mechanism and Adaptive Significance of Substrate Selection by a Sessile Rotifer

Mechanism and Adaptive Significance of Substrate Selection by a Sessile Rotifer

Chemical and isotopic composition of karstic lakes in Jamaica, West Indies

Effects of mine effluent on uptake of Co, Ni, Cu, As, Zn, Cd, Cr and Pb by aquatic macrophytes

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