Ecophysiology of Nitrogen-Fixing Systems

Gibson, A. H.; Jordan, D. C.

doi:10.1007/978-3-642-68153-0_9

Cited by 22 publications

(9 citation statements)

References 469 publications

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“…Net flux and deposition ratio of phosphorus are highest in the New Guinean forest. Gibson & Jordan 1983), especially at the highest altitudes. A large part of P in soils with low pH is immobilized, especially in allophane-rich volcanic-ash-derived soils (Sanchez 1976).…”

Section: Comparison With Other Montane Tropicalforestsmentioning

confidence: 95%

Nutrient Fluxes in Bulk Precipitation and Throughfall in Two Montane Tropical Rain Forests, Colombia

Veneklaas¹

1990

The Journal of Ecology

100

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Section: Comparison With Other Montane Tropicalforestsmentioning

confidence: 95%

Nutrient Fluxes in Bulk Precipitation and Throughfall in Two Montane Tropical Rain Forests, Colombia

Veneklaas¹

1990

The Journal of Ecology

100

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“…rhamnoides) and bog myrtle (Myrica gale L.). Hippopha~ prefers neutral or alkaline soils rich in lime (Akkermans, 1971; Gibson and Jordan, 1983;Oremus, 1982), whereas the other two species are well adapted to. acid soils (Bond et al, 1954;Trappe et al, 1968;Wheeler and McLaughlin, 1979).…”

Section: Introductionmentioning

confidence: 98%

Ionic balance, proton efflux, nitrate reductase activity and growth ofHippophaë rhamnoides L. ssp.rhamnoides as influenced by combined-N nutrition or N2 fixation

Troelstra¹,

Blacquière

Wagenaar³

et al. 1987

Plant Soil

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Growth of 2-month-old nonnodulated Hippopha~ rhamnoides seedlings supplied with combined N was compared with that of nodulated seedlings grown on zero N. Plant growth was significantly better with combined N than with N2 fixation and, although not statistically significant for individual harvests, tended to be highest in the presence of NH~, a mixture of NH~ and NO3 producing the highest yields. Growth was severely reduced when solely dependent on N: fixation and, unlike the combined-N plants, shoot to root ratios had only slightly increased after an initial decrease. An apparently insufficient nodule mass (nodule weight ratio < 5 per cent) during the greater part of the experimental period is suggested as the main cause of the growth reduction in N2-fixing plants.The in vivo nitrate reductase activity (NRA) of NO 3 dependent plants was almost entirely located in the roots. However, when grown with a combination of NO; and NH2, root NRA was decreased by approxi- 'Without acidity control and in the presence of NH4 +, specific rates of ion uptake and carboxylate generation were strongly depressed and growth was reduced by 30-35 per cent. Growth of nonnodulated H.rhamnoides plants ceased at the lower pH limit of 3.1-3.2 and deterioration set in; in the case of N2-fixing plants the nutrient solution pH stabilized at a value of 3.8-3.9 without any apparent adverse effects upon plant performance.The chemical composition of experimental and field-growing plants is being compared and some comments are made on the nitrogen supply characteristics of their natural sites.

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“…Plants were grown in a concentration of nitrate (5 mM KNO, and 5 mM Ca(N0,)2.4H,0) that should diminish or completely suppress nitrogenase activity (Munns 1977;Rigaud 1981;Gibson and Jordan 1983). Furthermore, enhanced nitrogen nutrition should favor shoot development over that of the root system, but shoot weight was unaffected by inoculation whereas root weight increased by an average of 26%.…”

mentioning

confidence: 99%

Cultivar-specific growth promotion of spring wheat (Triticum aestivum L.) by coexistent Bacillus species

Chanway¹,

Nelson²,

Holl³

1988

Can. J. Microbiol.

106

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of spring wheat (Triticum aestivum L.) by coexistent Bacillus species. Can. J . Microbiol. 34: 925-929.Seven bacterial strains belonging to the genus Bacillus were isolated from rhizosphere soil of spring wheat (Triticum aestivum L.) cv. Katepwa. The plants from which the microorganisms were isolated were collected from a field that had been continuously cropped with spring wheat for the past 27 years. Cultivar Katepwa had been grown for the last 5 years whereas the closely related cv. Neepawa had been cultivated for the 12 previous years. When tested as single strain inoculum in a sterilized sand and Turface (montmorillonite clay) mix. six of seven isolates promoted root growth of cv. Katepwa spring wheat (p < 0.05), but none promoted that of cv. Necpawa or of the more distant genetic relative cv. HY320. Shoot height was also increased in CV. Katepwa @ < 0. I), but shoot weight of all three cultivars was unaffected by inoculation.Consequently, the roor to shoot weight ratio of cv. Katepwa was also greater because of bacterization. These results indicate that beneficial bacteria may be isolated by employing a natural plant cultivar enrichment technique. CHANWAY, C. P., NELSON, L. M., et HOLL, F. B. 1988. Cultivar-specific growth promotion of spring wheat (Triticum aestivum L.) by coexistent Bacillus species. Can. J . Microbiol. 34 : 925-929. Sept souches bactkriennes appartenant au genre Bacillus ont ete isolees du sol de la rhizosphere de plants de ble de mars (Tr~trcum aestivum L.) cv. Katepwa. Ces bacteries sont ete isolees a partir de plants recoltes dans un champ qui avait Cte reserve exclusivement a la culture du ble de mars depuis les 27 dernieres annees. Le cv. Katepwa y avait ete cultive pendant les derniers 5 ans alors que le cultivar trks apparente Neepawa y avait ete cultive pendant les 12 annees precedentes. Chacune des souches isolees a Cte inoculee separiment dans un mklange sterilisC de sable et Turface (argile de montmorillonite).La croissance des racines du cv. Katepwa a ete favoriske par six des sept souches de Bacillus ( p < 0.05), mais aucune souche n'a favorise la croissance chez le cv. Neepawa ou le cv. HY320 dont la parente genktique est plus lointaine. La hauteur des tiges est aussi favorisee cher le cv. Kaiepwa @ < 0. I), mais l'inoculation n'a pas fait varier le poids des tiges chez aucun des lrois cultivars. En consequence le rapport de poids racine : tige du cv. Katepwa etait encore plus grand a cause de la colonisation bactirienne. Ccs resultats nlontrent hien que des bacteries utiles peuvent Etre isolees en employant une technique naturelle d'enrichissement du cultivar d'une plante.[Traduit par la revue]

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Ecophysiology of Nitrogen-Fixing Systems

Cited by 22 publications

References 469 publications

Nutrient Fluxes in Bulk Precipitation and Throughfall in Two Montane Tropical Rain Forests, Colombia

Nutrient Fluxes in Bulk Precipitation and Throughfall in Two Montane Tropical Rain Forests, Colombia

Ionic balance, proton efflux, nitrate reductase activity and growth ofHippophaë rhamnoides L. ssp.rhamnoides as influenced by combined-N nutrition or N2 fixation

Cultivar-specific growth promotion of spring wheat (Triticum aestivum L.) by coexistent Bacillus species

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