Some properties of arctic rhizobia

Caudry-Reznick, Suzanne; Prévost, Danielle; Schulman, Herbert M.

doi:10.1007/bf00690151

Cited by 13 publications

(9 citation statements)

References 13 publications

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“…Although these complex compounds may be associated with unknown function(s), the notion that they have a determinant role in establishing an effective symbiosis between the Rhizobium and the plant host has been subject of active investigation [9]. In this paper we demonstrate that the exopolysaccharide elaborated by the arctic Rhizobium NH [1] under the influence of manganese appears to be different from that obtained in a normal growth culture (unamended with manganese).…”

Section: Introductionmentioning

confidence: 82%

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Manganese elicits the synthesis of a novel exopolysaccharide in an arctic Rhizobium

Appanna¹,

Preston²

1987

FEBS Letters

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Under the influence of manganese (400μM), the arctic Rhizobium N11 [(1986) Arch. Microbiol. 146, 12–18] appeared to elaborate an exopolysaccharide that showed marked diversity with that synthesized in a medium deficient in added manganese. Both total carbohydrate and the uronic acid contents of these biomolecules appear to differ substantially. 13C‐NMR spectroscopy revealed three distinct signals in the anomeric region of the spectrum derived from the biopolymer secreted in the manganese rich medium, while that from the other exopolysaccharide exhibited numerous peaks. The resonance lines indicative of the non‐carbohydrate moieties were also found to be dissimilar. Further evidence for the unidentical nature of these biopolymers was obtained from viscosity and optical rotation measurements.

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Section: Introductionmentioning

confidence: 82%

“…The arctic Rhizobium Nll [1], was isolated from the root nodules of the leguminous plant, Oxytropis maydelliana, found in the Canadian northwest territories. The Rhizobium was maintained at 4°C on yeast extract and mannitol [10], solidified by the inclusion of 2% agar, and subcultured monthly.…”

Section: Organism and Culture Conditionsmentioning

confidence: 99%

Manganese elicits the synthesis of a novel exopolysaccharide in an arctic Rhizobium

Appanna¹,

Preston²

1987

FEBS Letters

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“…The phenotypic characteristics of the arctic rhizobia have been analysed in detail (Caudry-Reznick et al, 1986;Prevost et al, 1987). The bacteria appear variable but probably tielong to a single speeies (;80% DNA homology between sample isolates) which is cold adapted particularly as far as growth at lower tempetatures is concerned.…”

Section: Discussionmentioning

confidence: 99%

Nitrogen fixation by three species of leguminosae in the Canadian High Arctic Tundra

Schulman

Lewis

Tipping

et al. 1988

Plant Cell & Environment

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Abstract. Significant levels of nitrogenase activity (nitrogen fixation) were demonstrated in three species of Arctic legumes (Oxytropis maydelliana, O. arctobia and Astragalus alpinus) growing in high tundra at Sarcpa Lake, Melville Peninsula, N.W.T. Nitrogenase activity of intact plants was correlated with the number of nodules per plant, with field soil temperatures and limited by water shortage. Activity in freshly detached nodules showed a plateau of maximum activity between 10°C and 25°C and a near linear decline with temperature down to 0°C. Unusually, the segmented nodules of all three species are perennial in which growth and leghaemoglobin production resumes each spring from an overwintering apical meristem. Nodules are most numerous in the warmer soil stratum (2–10 cm. depth). Other studies indicate that the arctic rhizobia belong to a single cold‐adapted species which has co‐evolved with the legumes of tundra.

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“…Cool soil temperatures in temperate climates limit or delay nodulation due to low microbial activity (Caudry‐Reznick et al. 1986, Bordeleau and Prevost 1994).…”

Section: Introductionmentioning

confidence: 99%

Chickpea Yields in Relation to Rhizobium Inoculation from Wild Chickpea at High Altitudes

Kantar¹,

Elkoca²,

Öğütçü³

et al. 2003

J Agronomy Crop Science

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A study was conducted in order to investigate yields in relation to seed inoculation of chickpea (Cicer arietinum L. cv. Aziziye-94) with eight Rhizobium leguminosarum ssp. ciceri strains isolated from wild chickpeas (C. anatolicum) of high altitudes (2000-2500 m) in comparison with standard bacterial culture, uninoculated control and mineral nitrogen fertilizer application in the growth room and in the field in 1999, 2000 and 2001 in Erzurum (29°55¢N and 41°16¢E at an altitude of 1850 m), Turkey.In the growth room trial, bacterial inoculations significantly increased shoot dry weight, N %, total N, N fixed and efficiency of symbiosis compared with the uninoculated control treatment depending on the strains. In the field trial, inoculations with HF 274 and HF 177 increased nodule dry weight, N %, chlorophyll, seed yield and total biomass yield depending on the strains, the lowest values being recorded in uninoculated plots. As an average of years, inoculation with HF 274, HF 177 and standard bacterial culture increased seed yields, respectively, by 23.3, 22.7 and 16.8 % over uninoculated control.In conclusion, rhizobial inoculation of chickpea with HF 274 and HF 177 strains isolated from wild chickpeas (C. anatolicum) of high altitudes may substitute costly N fertilizers in chickpea production even in cold highland areas such as Erzurum.

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Some properties of arctic rhizobia

Cited by 13 publications

References 13 publications

Manganese elicits the synthesis of a novel exopolysaccharide in an arctic Rhizobium

Manganese elicits the synthesis of a novel exopolysaccharide in an arctic Rhizobium

Nitrogen fixation by three species of leguminosae in the Canadian High Arctic Tundra

Chickpea Yields in Relation to Rhizobium Inoculation from Wild Chickpea at High Altitudes

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