+ Site Statistics
References:
54,258,434
Abstracts:
29,560,870
PMIDs:
28,072,757
+ Search Articles
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ PDF Full Text
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Translate
+ Recently Requested

Nodule permeability to O-2 and nitrogenase-linked respiration in bean genotypes varying in the tolerance of N-2 fixation to P deficiency



Nodule permeability to O-2 and nitrogenase-linked respiration in bean genotypes varying in the tolerance of N-2 fixation to P deficiency



Plant Physiology & Biochemistry 34(6): 871-878



Since nodule permeability that contributes to regulate the nodule oxygen concentration at a low level, has been shown to vary with P nutrition in soybean, the effect of P deficiency on nodule permeability was investigated in common bean (Phaseolus vulgaris L.) genotypes, G19839 and G3010, that were previously selected for their contrasting response of nodule nitrogenase activity to P deficiency. Shoot dry weight for control P treatment was higher in G3010 than in G19839, while that for low P treatment was higher in G19839 than in G3010, although root and nodule biomass were almost similar in both genotypes whatever P treatment. For both genotypes, low-P plants formed fewer nodules with a higher proportion of small nodules than in control plants. Total 0-2 uptake of nodulated root (JOrn) and nodule O-2 uptake linked to nitrogenase (JOn) were respectively 2 and 1.5 times higher in control than in low-P plants in both genotypes, and O-2 uptake per gram nodule dry weight was increased by 140 and 84% in G3010 and G19839, respectively, by P deficiency. The nodule O-2 permeability, computed as the ratio of the slope of the regression between JOrn and external PO-2 to the total nodule surface, did not differ between genotypes for control plants. By contrast, nodule O-2 permeability was increased by P deficiency in the sensitive genotype G3010 while it remained unchanged in the tolerant genotype G19839. In the sensitive genotype, P deficiency also decreased the nodule respiratory quotient. It is suggested that in the sensitive cultivars, P deficiency increases oxygen limitation in the nodules by increasing the rate of O-2 consumption that may cause an increase in nodule permeability to alleviate this nodule O-2 limitation.

(PDF emailed within 1 workday: $29.90)

Accession: 009101908

Download citation: RISBibTeXText


Related references

Experimental determination of the respiration associated with soybean and rhizobium nitrogenase function nodule maintenance and total nodule nitrogen fixation. Plant Physiology 75(1): 49-53, 1984

Experimental determination of the respiration associated with soybean/rhizobium nitrogenase function, nodule maintenance, and total nodule nitrogen fixation. Plant Physiology 75(1): 49-53, 1984

Nitrogenase activity, nodule respiration, and o(2) permeability following detopping of alfalfa and birdsfoot trefoil. Plant Physiology 98(3): 894-900, 1992

Nitrogenase activity nodule respiration and oxygen permeability following detopping of alfalfa and birdsfoot trefoil. Plant Physiology 98(3): 894-900, 1992

Nitrogen fixation by subterranean clover at varying stages of nodule dehydration. II. Efficiency of nitrogenase functioning. Journal of Experimental Botany 41(230): 1189-1197, 1990

Ontogenetic changes in root nodule subpopulations of common bean (Phaseolus vulgaris L.). I. Nitrogenase activity and respiration during pod-filling. Journal of experimental botany 44(260): 563-569, 1993

Efficiency of symbiotic N fixation, H2 evolution and nodule respiration in the French bean (Phaseolus vulgaris L.). Eficiencia da fixacao simbiotica do nitrogenio X evolucao do H2 X respiracao dos nodulos de feijoeiro Phaseolus vulgaris L: 190, 1981

Nodule conductance varied among common bean (Phaseolus vulgaris) genotypes under phosphorus deficiency. Journal of Plant Physiology 162(3): 309-315, 2005

Nitrogen fixation by subterranean clover at varying stages of nodule dehydration. I. Carbohydrate status and short-term recovery of nodulated root respiration. Journal of Experimental Botany 41(230): 1175-1187, 1990

Comparison of common bean Phaseolus vulgaris L genotypes for nitrogen fixation tolerance to soil drying. Plant and Soil 364(1-2): 29-37, 2013

Comparison of inhibition of N2 fixation and ureide accumulation under water deficit in four common bean genotypes of contrasting drought tolerance. Annals of Botany 113(6): 1071-1082, 2014

Effect of salt and P deficiency on biological nitrogen fixation in two common bean genotypes, Coco sensitive and BAT 477 tolerant. 3rd European conference on grain legumes Opportunities for high quality, healthy and added value crops to meet European demands Valladolid, Spain, 14-19 November 1998: 432-433, 1998

Effect of phosphorus deficiency on the growth, symbiotic N2 fixation and proton release by two bean (Phaseolus vulgaris) genotypes. Agronomie 21(6/7): 683-689, 2001

Nodule structure and nitrogenase activity of Coriaria arborea in response to varying pO2. Plant and Soil 118(1-2): 97-109, 1989

Is genotypic variation of H⁺ efflux under P deficiency linked with nodulated-root respiration of N₂ fixing common-bean (Phaseolus vulgaris L.)?. Journal of Plant Physiology 169(11): 1084-1089, 2012