Nodulation of Soybean under Field Conditions

Hamdi, Y.A.; Abd-Elsamea, M. E.; Lofti, M.

doi:10.1016/s0044-4057(74)80025-0

Zentralblatt Für Bakteriologie, Parasitenkunde, Infektionskrankheiten Und Hygiene. Zweite Naturwissenschaftliche Abteilung: All

1974

DOI: 10.1016/s0044-4057(74)80025-0

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Nodulation of Soybean under Field Conditions

Y.A. Hamdi¹,

M. E. Abd-Elsamea²,

M. Lofti³

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1978

2011

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“…Various reports indicate Egyptian soil do not contain indigenous Bradyrhizobium and Rhizobium leguminosarium biovar phaseoli (Hamdi et al 1974, Abd-Alla 1999, Moawad et al 2004. Consequently proper inoculation is required for enhancing legume nodulation and nitrogen fixation (Rengel 2002).…”

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Nodulation and nitrogen fixation in interspecies grafts of soybean and common bean is controlled by isoflavonoid signal molecules translocated from shoot

Abd‐Alla¹

2011

PLANT SOIL ENVIRON

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Identification of common signals of nodulation control among legume species will facilitate progress in enhancing symbiotic nitrogen fixation of legumes in sustainable agriculture system. Grafting experiments between soybean and common bean were carried out to evaluate whether a common shoot signals control the expression of hypernodulation among the tow species. Grafting of a hypernodulating soybean mutant NOD1-3 shoots to three cultivars of normally nodulating common bean roots resulted in hypernodulation on roots of three tested cultivars of common bean. The shoot control of hypernodulation may be causally related to differential root isoflavonoid levels, which are also controlled by shoot factors. Isoflavonoid analysis from root extracts of grafted plants showed that NOD1-3 shoots had markedly higher root isoflavonoid concentrations in roots of both NOD1-3 and common bean cv. Adzuki compared with self-grafts of common bean Adzuki. Exogenous application of daidzein, genistein, coumestrol, glycitein and in combination at concentration of 10 µmol to the nutrient solution significantly increased the nodule numbers of common bean cv. Adzuki. Therefore, the control of hypernodulation expression by isoflavonoid signal molecules translocated from shoot is common among legume species.

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mentioning

confidence: 99%

Nodulation and nitrogen fixation in interspecies grafts of soybean and common bean is controlled by isoflavonoid signal molecules translocated from shoot

Abd‐Alla¹

2011

PLANT SOIL ENVIRON

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Effect ofLupinus seed diffusates onBradyrhizobium sp. growth and nodulation of lupine

1998

Folia Microbiol

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Seeds of three species of lupine (Lupinus termis, L. triticale andL. albus) were tested to determine if the seed contains diffusable substances toxic to bradyrhizobia.L. albus seeds were less toxic to bradyrhizobia, followed byL. triticale. Six strains ofBradyrhizobium were evaluated for their resistance to the toxic substances in lupine seeds. Zones of growth inhibition were determined on yeast-mannitol-agar medium surrounding surface-sterilized seed. The effect of surface sterilization of seeds by different chemical treatments on seed toxicity was assessed. Seeds soaked in water for 1 h before placing on agar surface significantly decreased the inhibition zone. Also, the effect of soaking seeds in water for 4 h before planting and inoculation on nodulation, nitrogen fixation and plant growth were investigated. Addition of seed diffusate to soaked seeds significantly decreased nodulation and plant growth. Autoclaving the seed diffusate had no effect on the toxicity of the seed diffusate. Addition of the absorbent polyvinylpolypyrrolidone (PVPP) to seed diffusates significantly decreased the inhibitory effect of seed diffusate on nodulation and plant growth. Seed diffusate substances were water-soluble, heat-stable and partially bound to PVPP.

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Efficiency of Rhizobium japonicum Strains as Affecting Nitrate Reductase and Dehydrogenase Activities of the Soybean Nodules

El-Din

Hamdi

Tewfik

1978

Zentralblatt Für Bakteriologie, Parasitenkunde, Infektionskrankheiten Und Hygiene. Zweite Naturwissenschaftliche Abteilung: Mik

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Nodulation of Soybean under Field Conditions

Cited by 3 publications

References 3 publications

Nodulation and nitrogen fixation in interspecies grafts of soybean and common bean is controlled by isoflavonoid signal molecules translocated from shoot

Nodulation and nitrogen fixation in interspecies grafts of soybean and common bean is controlled by isoflavonoid signal molecules translocated from shoot

Effect ofLupinus seed diffusates onBradyrhizobium sp. growth and nodulation of lupine

Efficiency of Rhizobium japonicum Strains as Affecting Nitrate Reductase and Dehydrogenase Activities of the Soybean Nodules

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