The beneficial plant growth-promoting association of Rhizobium leguminosarum bv. trifolii with rice roots

By Y. Yanni, R. Rizk, F. A. El-Fattah, A. Squartini, V. Corich, A. Giacomini, F. J. Bruijn, Jan LW Rademaker, Jaime Maya-Flores, P. Ostrom and 15 more. 2001

356 citations recorded by the source corpus.

his paper summarizes a multinational collaborative project to search for natural, intimate associations between rhizobia and rice (Oryza sativa L.), assess their impact on plant growth, and exploit those combinations that can enhance grain yield with less dependence on inputs of nitrogen (N) fertilizer. Diverse, indigenous populations of Rhizobium leguminosarum bv. trifolii (the clover root-nodule endosymbiont) intimately colonize rice roots in the Egyptian Nile delta where this cereal has been rotated successfully with berseem clover (Trifolium alexandrinum L.) since antiquity. Laboratory and greenhouse studies have shown with certain rhizobial strain-rice variety combinations that the association promotes root and shoot growth thereby significantly improving seedling vigour that carries over to significant increases in grain yield at maturity. Three field inoculation trials in the Nile delta indicated that a few strain-variety combinations significantly increased rice grain yield, agronomic fertilizer N-use efficiency and harvest index. The benefits of this association leading to greater production of vegetative and reproductive biomass more likely involve rhizobial modulation of the plant's root architecture for more efficient acquisition of certain soil nutrients [e.g. N, phosphorus (P), potassium (K), magnesium (Mg), calcium (Ca), zinc (Zn), sodium (Na) and molybdenum (Mo)] rather than biological N 2 fixation.

Subfields: Plant Science

View Paper: https://www.semanticscholar.org/paper/a99dc2e759dd11120c56c58c42579be90c043754

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Citations in the corpus

Grain Legumes in Northern Great Plains : Impacts on Selected Biological Soil Processes (2007, background): “The rhizobia act as plant growth-promoting rhizobacteria (PGPR) that have been shown to expand the root architecture of the crop, enabling it to accumulate more N, P, K, Ca, Mg, Na, Zn, and Mo than control plants (Yanni et al., 2001).”
Enhancement of rice production using endophytic strains of Rhizobium leguminosarum bv. trifolii in extensive field inoculation trials within the Egypt Nile delta (2010, methodology): “This result is consistent with our previous work (Yanni et al. 1997; Yanni et al. 2001) showing that rhizobial inoculation and N-fertilization contributed to rice vegetative growth and grain yield in parallel, with the single exception where an excessive N-fertilization dose (above the recommended)…”
Potential use of rhizobial bacteria as promoters of plant growth for increased yield in landraces of African cereal crops (2004, background): “Their observations were consistent with findings on maize root colonization and infection by rhizobia reported by Schloter et al. (1997) and Yanni et al. (2001).”
Molecular mechanisms of plant and microbe coexistence (2008, background): “A further observation of this plant microbe interaction by Tokala et al. (2002) showed a nodulation-helper-effect of a root-colonizing soil streptomycete, resulting in increased nodulation frequency during colonization of the root.”
Efficacy of Biofertilizers: Challenges to Improve Crop Production (2016, background): “…are able to provide up to 90 % of the N requirements of the host through atmospheric N 2 fi xation (Franche et al. 2009 ), but they can also behave as plant growth promoting rhizobacteria (PGPR) with non-legumes such as maize, wheat, rice, and canola (Hayat et al. 2010 ; Yanni et al. 2001 ).”
Legumes in the reclamation of marginal soils, from cultivar and inoculant selection to transgenic approaches (2011, background): “Alternatively, the legume or non-legume plant growth stimulation might be due to the production and secretion of plant growth regulators by rhizobia, such as indole-3acetic acid (IAA), gibberellins, and cytokinins (Yanni et al. 2001; Verma et al. 2001; Boiero et al. 2007; Vargas et al. 2009).”
Effects of rhizobia and plant growth promoting bacteria inoculation on germination and seedling vigor of lowland rice (2012, background): “It has been demonstrated that strains R. leguminosarum bv. Trifolli strain E-11 has been reported to have a good effect on rice (Yanni et al., 2001) due to production of IAA (Dazzo et al., 2000).”
Biosynthesis of phytohormones from novel rhizobacterial isolates and their in vitro plant growth-promoting efficacy (2017, background): “Rhizobium strains produce indole 3-acetic acid (IAA) and GA7 tentatively from its pure culture (Yanni et al. 2001).”
Soil beneficial bacteria and their role in plant growth promotion: a review (2010, result): “These observations were consistent with findings on maize root colonization and infection by Rhizobia reported by Schloter et al. (1997) and Yanni et al. (2001).”