Efficiency of N2 fixation inVicia faba L. in combination with differentRhizobium leguminosarum strains

Schulze, Joachim; Beschow, Heidrun; Adgo, Enyew; Merbach, W.

doi:10.1002/1522-2624(200008)163:4<367::aid-jpln367>3.0.co;2-s

Cited by 14 publications

(11 citation statements)

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“…Apart from the comparison of M. sativa nodules (0.69-1.13 mg N mg nodule À 1 h À 1 ), these values are low when compared to data obtained on other legumes. We measured such values under comparable experimental conditions on white lupin (0.57-1.06 mg N mg nodule À 1 h À 1 ) (H 2 evolution measurement, Schulze et al, 2006), common bean (1.01-1.64 mg N mg nodule À 1 h À 1 ) (N-increment, Fischinger et al, 2006), pea plants (1.9-2.05 mg N mg nodule À 1 h À 1 ) (H 2 evolution measurement, S.A. Fischinger and J. Schulze, unpublished data), faba bean (0.67-1.33 mg N mg nodule À 1 h À 1 ) (N-increment, recalculated from Schulze et al, 2000).…”

Section: Discussionmentioning

confidence: 56%

“…In particular, in young M. truncatula plants, the %N concentration in shoots was low and the leaves were of more chlorotic color when compared with M. sativa. Although there was a tendency to lower %N in M. truncatula nodules, the values were still within a range that is found in nodules of legumes with intensive growth (Schulze et al, 2000). In both species, %N concentration in plants was lower when grown in combination with strain 2011 versus 102F51.…”

Section: Nitrate Versus N 2 Fixationmentioning

confidence: 99%

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The efficiency of nitrogen fixation of the model legume Medicago truncatula (Jemalong A17) is low compared to Medicago sativa

Sulieman

Schulze

2010

Journal of Plant Physiology

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Section: Discussionmentioning

confidence: 56%

Section: Nitrate Versus N 2 Fixationmentioning

confidence: 99%

The efficiency of nitrogen fixation of the model legume Medicago truncatula (Jemalong A17) is low compared to Medicago sativa

Sulieman

Schulze

2010

Journal of Plant Physiology

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“…Seemingly efficient pea and alfalfa symbioses with a low carbon cost were shown to have a lower accumulation of plant dry matter compared to less efficient symbiosis (Skot et al, 1986;Twary and Heichel, 1991). However, the opposite result has also been found for Vicia faba grown with different Rhizobium strains (Schulze et al, 2000). For actinorhizal plants, one study has dealt with this topic where Myrica gale plants were inoculated with several sources of Frankia differing in the phenotype of producing spores in the root nodules (Monz and Schwintzer, 1989).…”

Section: Discussionmentioning

confidence: 86%

“…Reasons for variation comprise plant species and cultivar, species and strain of N 2 -fixing bacterium, combination of host and bacterium, and ability to recover energy from the obligate H 2 production by nitrogenase, but also plant ontogeny or exposure to stress (Matamoros et al, 1999;Pate and Layzell, 1990;Schulze et al, 1994Schulze et al, , 2000Skot et al, 1986;Tjepkema and Winship, 1980;Vance and Heichel, 1991). Most studies have investigated crop legumes.…”

Section: Introductionmentioning

confidence: 99%

Carbon cost of nitrogenase activity in Frankia–Alnus incana root nodules

Lundquist

2005

Plant Soil

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The carbon cost of nitrogenase activity was investigated to determine symbiotic efficiency of the actinorhizal root nodule symbiosis between the woody perennial Alnus incana and the soil bacterium Frankia. Respiration (CO 2 production) and nitrogenase activity (H 2 production) by intact nodulated root systems were continuously recorded in short-term assays in an open-flow gas exchange system. The assays were conducted in N 2 :O 2 , thus under N 2 -fixing conditions, in all experiments except for one. This avoided the declines in nitrogenase activity and respiration due to N 2 deprivation that occur in acetylene reduction assays and during extended Ar:O 2 exposures in H 2 assays. Two approaches were used: (i) direct estimation of root and nodule respiration by removing nodules, and (ii) decreasing the partial pressure of O 2 from 21 to 15% to use the strong relationship between respiration and nitrogenase activity to calculate CO 2 /H 2 . The electron allocation of nitrogenase was determined to be 0.6 and used to convert the results into moles of CO 2 produced per 2e ) transferred by nitrogenase to reduction of N 2 . The results ranged from 2.6 to 3.4 mol CO 2 produced per 2e ) . Carbon cost expressed as g C produced per g N reduced ranged from 4.5 to 5.8. The result for this actinorhizal tree symbiosis is in the low range of estimates for N 2 -fixing actinorhizal symbioses and crop legumes. Methodology and comparisons of root nodule physiology among actinorhizal and legume plants are discussed.

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“…Nitrate is not only a powerful signal regulating root and shoot growth (Scheible et al 1997), but the presence of nitrate in the soil restricts nodulation in leguminous plants (Schubert 1995). Competition for resources between pods and nodules has been considered to result in nodule senescence, but no direct interdependence between C use efficiency and N-fixation capacity has been demonstrated (Schulze et al 2000). Moreover, the effect of symbiotic plasmids on overall carbon costs is relatively small.…”

Section: Introductionmentioning

confidence: 99%

Genetic variation in pea (Pisum sativum L.) demonstrates the importance of root but not shoot C/N ratios in the control of plant morphology and reveals a unique relationship between shoot length and nodulation intensity

Ludidi

Pellny

Kiddle

et al. 2007

Plant Cell & Environment

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Nodule numbers are regulated through systemic autoregulatory signals produced by shoots and roots. The relative effects of shoot and root genotype on nodule numbers together with relationships to organ biomass, carbon (C) and nitrogen (N) status, and related parameters were measured in pea (Pisum sativum) exploiting natural genetic variation in maturity and apparent nodulation intensity. Reciprocal grafting experiments between the early (Athos), intermediate (Phönix) and late (S00182) maturity phenotypes were performed and Pearson's correlation coefficients for the parameters were calculated. No significant correlations were found between shoot C/N ratios and plant morphology parameters, but the root C/N ratio showed a strong correlation with root fresh and dry weights as well as with shoot fresh weight with less significant interactions with leaf number. Hence, the root C/N ratio rather than shoot C/N had a predominant influence on plant morphology when pea plants are grown under conditions of symbiotic nitrogen supply. The only phenotypic characteristic that showed a statistically significant correlation with nodulation intensity was shoot length, which accounted for 68.5% of the variation. A strong linear relationship was demonstrated between shoot length and nodule numbers. Hence, pea nodule numbers are controlled by factors related to shoot extension, but not by shoot or root biomass accumulation, total C or total N. The relationship between shoot length and nodule numbers persisted under field conditions. These results suggest that stem height could be used as a breeding marker for the selection of pea cultivars with high nodule numbers and high seed N contents.

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Efficiency of N2 fixation inVicia faba L. in combination with differentRhizobium leguminosarum strains

Cited by 14 publications

References 0 publications

The efficiency of nitrogen fixation of the model legume Medicago truncatula (Jemalong A17) is low compared to Medicago sativa

The efficiency of nitrogen fixation of the model legume Medicago truncatula (Jemalong A17) is low compared to Medicago sativa

Carbon cost of nitrogenase activity in Frankia–Alnus incana root nodules

Genetic variation in pea (Pisum sativum L.) demonstrates the importance of root but not shoot C/N ratios in the control of plant morphology and reveals a unique relationship between shoot length and nodulation intensity

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