Conserved Nodulation Genes are Obligatory for Nonlegume Nodulation

Scott, K. John; Saad, Marlene; Price, G. Dean; Gresshoff, Peter M.; Kane, Heather J.; Chua, Kaw Yan

doi:10.1007/978-94-009-4482-4_59

Cited by 5 publications

(5 citation statements)

References 8 publications

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“…However, Becking (1983) reported that 12 of the twenty strains tested were able to form nodules. Others have claimed that R. leguminosarum biovar trifolii is unable to nodulate Parasponia without transfer of specific DNA fragments from either the Parasponia strain ANU289 (CP283) or the broad host range strain NGR234 (Lablab purpureus) (Morrison et al, 1986) to the R. leguminosarum biovar trifolii strain ANU843 (Bender et al, 1988;Scott et al, 1987). The present experiments showed that nodulation of P. andersonii with clover rhizobia could be consistently achieved but that nodulation was delayed, often taking as long as 105 days, re-isolates from these nodules always nodulated T. repens effectively or ineffectively depending on the strain of R. leguminosarum biovar trifolii (Table 1).…”

Section: Discussionmentioning

confidence: 99%

“…Competition studies between Bradyrhizobium belonging to each of these groups show that those isolated from species of Parasponia are better at initiating nodules on P. andersonii and exclude strains isolated from legumes (Trinick and Hadobas, 1989). While fast-growing strains of Rhizobium belonging to the alfalfa, clover, bean and pea groups have previously been shown not to form nodules on P. andersonii (Becking, 1983;Bender et al, 1988;Scott et al, 1987;Trinick and Galbraith, 1980), fast-growing strains isolated from tropical legumes such as Leucaena leucocephala, Mimosa spp., Acacia farnesiana and Lablab purpureus are able to form ineffective nodules, (Trinick and Galbraith, 1980). However Becking (1983) showed delayed nodulation with 12 out of 20 strains of R. leguminosarum biovar trifolii.…”

Section: Introductionmentioning

confidence: 99%

“…Previous reports of failure to nodulate Parasponia with the clover rhizobia may reflect different environmental conditions and or insufficient duration of their experiments. Scott et al, (1987) found that the introduction of two overlapping cosmids pPR109 and pPRlll, derived from a Parasponia strain of Bradyrhizobium, into R. trifolii enabled it to consistently nodulate Parasponia. Recently, Bender et al, (1988) also claimed that R. leguminosarum biovar trifolii was unable to nodulate Parasponia without the addition of the nodDl gene from the fast-growing broad host range strain NGR234 (Trinick, 1980a) from Lablab purpureus.…”

Section: Introductionmentioning

confidence: 99%

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Nodulation of Trifolium repens with modified Bradyrhizobium and the nodulation of Parasponia with Rhizobium leguminosarum biovar trifolii

Trinick

Hadobas

1990

Plant Soil

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Thirty one strains of Rhizobium leguminosarum biovar trifolii isolated from the North and South American continents, New Guinea, USSR, Turkey and Australia, nodulated P. andersonii ineffectively when grown in plant growth tubes and in Leonard jars. Nodules were slow to form, sometimes taking over 100 days. Reisolates of R. leguminosarum biovar trifolii from P. andersonii nodulated Trifolium repens and their identity was confirmed using serological techniques. Dual occupation of nodules by Rhizobium and Bradyrhizobium in P. andersonii is reported. The reduced effectiveness of the Bradyrhizobium symbiosis depended on the relative numbers of Rhizobium occupants in this dual system. R. leguminosarum biovar trifolii and Bradyrhizobium strains from Parasponia were able to co-exist in nodules on P. andersonii and maintain similar populations in the rhizosphere and on culture media. Bradyrhizobium strains, separated from R. leguminosarum biovar trifolii, were able to initiate and form nodule-like structures on T. repens. Bradyrhizobium bacteria were identified as the sole occupants of the cells of the nodule-like structures on Trifolium repens using an immunogold labelling technique applied to ultrathin sections. The re-isolates of Bradyrhizobium obtained from these nodule-like structures on T. repens were able to effectively nodulate P. andersonii.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Nodulation of Trifolium repens with modified Bradyrhizobium and the nodulation of Parasponia with Rhizobium leguminosarum biovar trifolii

Trinick

Hadobas

1990

Plant Soil

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“…However, given that the nodulation genes nodABC and nodD are highly conserved in rhizobia, including Parasponia-rhizobia (Marvel et al;1987;Scott et al, 1987), we can infer that flavonoid and/or isoflavonoid compounds are exuded by the plant to induce these nod genes (Bender et al, 1987a).…”

Section: Signal Exchangementioning

confidence: 97%

Root-based N2-fixing Symbioses: Legumes, Actinorhizal Plants, Parasponia sp. and Cycads

2005

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In the mutualistic symbioses between legumes and rhizobia, actinorhizal plants and Frankia, Parasponia sp. and rhizobia, and cycads and cyanobacteria, the N 2 -fixing microsymbionts exist in specialized structures (nodules or cyanobacterial zones) within the roots of their host plants. Despite the phylogenetic diversity among both the hosts and the microsymbionts of these symbioses, certain developmental and physiological imperatives must be met for successful mutualisms. In this review, phylogenetic and ecological aspects of the four symbioses are first addressed, and then the symbioses are contrasted and compared in regard to infection and symbio-organ development, supply of carbon to the microsymbionts, regulation of O 2 flux to the microsymbionts, and transfer of fixed-N to the hosts. Although similarities exist in the genetics, development, and functioning of the symbioses, it is evident that there is great diversity in many aspects of these root-based N 2 -fixing symbioses. Each symbiosis can be admired for the elegant means by which the host plant and microsymbiont integrate to form the mutualistic relationships so important to the functioning of the biosphere.

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“…However, given that the nodulation genes nodABC and nodD are highly conserved in rhizobia, including Parasponia-rhizobia (Marvel et al, 1987;Scott et al, 1987), we can infer that flavonoid and/or isoflavonoid compounds are exuded by the plant to induce these nod genes (Bender et al, 1987a). However, given that the nodulation genes nodABC and nodD are highly conserved in rhizobia, including Parasponia-rhizobia (Marvel et al, 1987;Scott et al, 1987), we can infer that flavonoid and/or isoflavonoid compounds are exuded by the plant to induce these nod genes (Bender et al, 1987a).…”

Section: Signal Exchangementioning

confidence: 99%

Root-based N2-fixing symbioses: Legumes, actinorhizal plants, Parasponia sp. and cycads

2005

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Conserved Nodulation Genes are Obligatory for Nonlegume Nodulation

Cited by 5 publications

References 8 publications

Nodulation of Trifolium repens with modified Bradyrhizobium and the nodulation of Parasponia with Rhizobium leguminosarum biovar trifolii

Nodulation of Trifolium repens with modified Bradyrhizobium and the nodulation of Parasponia with Rhizobium leguminosarum biovar trifolii

Root-based N2-fixing Symbioses: Legumes, Actinorhizal Plants, Parasponia sp. and Cycads

Root-based N2-fixing symbioses: Legumes, actinorhizal plants, Parasponia sp. and cycads

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