Dual inoculation with strains of Bradyrhizobium japonicum and Azospirillum brasilense to improve growth and biological nitrogen fixation of soybean (Glycine max L.)

Galal, Y. G. M.

doi:10.1007/s003740050250

Cited by 13 publications

(8 citation statements)

References 12 publications

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“…Increased plant growth observed in this study in response to inoculation with Azospirillum is in agreement with previously reported results [25] [26] [43] [47] and may be attributed to increased availability of N, due to nitrogen fixation [18] and to the presence of hormones that stimulate plant root growth [25] In previous studies done by our research group, we observed that co-inoculation of soybean with Bradyrhizobium and Azospirillum has resulted in increased grain yield [26] [53], and the technology has been approved and registered for utilization with soybean by the Brazilian regulatory agency. In the present study, we observed that co-inoculation is beneficial throughout the plant's growth cycle, since it favors the precocity of nodulation, a critical step for the establishment of the symbiotic relationship between soybean plants and N 2 -fixing bacteria.…”

Section: Resultssupporting

confidence: 94%

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Co-Inoculation of Soybean with Bradyrhizobium and Azospirillum Promotes Early Nodulation

Chibeba¹,

Guimarães²,

Brito³

et al. 2015

AJPS

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Soybean inoculation with elite strains of Bradyrhizobium to improve nodulation, N2 fixation, and grain yield is well established worldwide. However, when grown in soils where N is deficient, soybean undergoes an initial phase of N starvation that may last up to 20 days after seedling germination due to the lack of synchronism between the phase when seed N reserves are exhausted and the moment when plants begin to benefit from the nitrogen fixed by the bacteria. Practices that promote early nodulation may play a key role in reducing the N starvation period. Azospirillum is a plant growth promoting rhizobacteria (PGPR) that can stimulate root hair formation and root growth, creating more sites for early root infection and nodule formation by N2-fixing Bradyrhizobium spp. In this study, the effects of co-inoculating soybeans with Bradyrhizobium spp. and Azospirillum brasilense on nodulation precocity and N2 fixation were evaluated under greenhouse and field conditions. Nodule number and dry weight, as well as plant and root dry weight and N accumulated in shoots at 15, 18, 21, 24 and 30 days after emergence (DAE) were evaluated in response to inoculation with Bradyrhizobium spp. alone or when co-inoculated with Azospirillum sp. In the greenhouse, co-inoculated plants nodulated precociously as indicated by a significant increase (p < 0.05) in nodule biomass observed at (include) 21 DAE. More pronounced effects of co-inoculation were observed in the field as early as 18 DAE, suggesting that the presence of Azospirillum helps plants to overcome environmental stresses.

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Section: Resultssupporting

confidence: 94%

“…and A. brasilense on nodule numbers [26] [42]- [44], nodule dry matter [24] [42], and root dry matter [25] [43] [45]. It is possible that the increased nodulation of co-inoculated plants is a Table 2.…”

Section: Resultsmentioning

confidence: 99%

Co-Inoculation of Soybean with Bradyrhizobium and Azospirillum Promotes Early Nodulation

Chibeba¹,

Guimarães²,

Brito³

et al. 2015

AJPS

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“…However, soil sterilization stimulated colonization of PGPR strains in the rhizosphere, which positively influenced nutrient availability and growth of barley. Other researches have shown that plant dry weight and fixed N in sterilized soil were higher than in non-sterile soil (Galal, 1997;Marschner & Rumberger, 2004). Similar growth stimulations in sterilized soil have been observed in other studies (Khaliq & Sanders 1998;Troelstra et al, 2001).…”

Section: Discussionsupporting

confidence: 78%

Effects of mineral and biofertilizers on barley growth on compacted soil

Canbolat¹,

Barik²,

Çakmakçı³

et al. 2006

Acta Agriculturae Scandinavica, Section B - Soil & Plant Sc

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Biofertilizers are an alternative to mineral fertilizers for increasing soil productivity and plant growth in sustainable agriculture. The objective of this study was to evaluate possible effects of three mineral fertilizers and four plant growth promoting rhizobacteria (PGPR) strains as biofertilizer on soil properties and seedling growth of barley (Hordeum vulgare ) at three different soil bulk densities, and in three harvest periods. The application treatments included the control (without bacteria inoculation and mineral fertilizers), mineral fertilizers (N, NP and P) and plant growth promoting rhizobacteria species (Bacillus licheniformis RC04, Paenibacillus polymyxa RC05, Pseudomonas putida RC06, and Bacillus OSU-142) in sterilized soil. The PGPR, fungi, seedling growth, soil pH, organic matter content, available P and mineral nitrogen were determined in soil compacted artificially to three bulk density levels (1.1, 1.25 and 1.40 Mg m (3 ) at 15, 30, and 45 days of plant harvest. The results showed that all the inoculated bacteria contributed to the amount of mineral nitrogen. Seed inoculation significantly increased the count of bacteria and fungi. Data suggest that seed inoculation of barley with PGPR strains tested increased root weight by 9 Á12.2%, and shoot weight by 29.7 Á43.3% compared with control. The N, NP and P application, however, increased root weight up to 18.2, 25.0 and 7.4% and shoot weight by 31.6, 43.4 and 26.4%, respectively. Our data show that PGPR stimulate barley growth and could be used as an alternative to chemical fertilizer. Soil compaction hampers the beneficial plant growth promoting properties of PGPR and should be avoided.

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“…They suggested that, although A. brasilense strains are capable of changing the mineral balance and content of plants, it is unlikely that this ability is a general mechanism responsible for plant improvement by A. brasilense. Similar findings were reported by Galal and Ali (2004, also see the references there in); Galal (1997).…”

Section: Introductionsupporting

confidence: 90%

ENHANCEMENT OF NUTRIENTS UPTAKE BY LUPIN (Lupinus Albus L.) PLANT INOCULATED WITH BACTERIA AND IRRIGATED WITH SALINE WATER

El-Hadidi

Msoliman

Galal

et al. 2007

Journal of Soil Sciences and Agricultural Engineering

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Dual inoculation with strains of Bradyrhizobium japonicum and Azospirillum brasilense to improve growth and biological nitrogen fixation of soybean (Glycine max L.)

Cited by 13 publications

References 12 publications

Co-Inoculation of Soybean with <i>Bradyrhizobium</i> and <i>Azospirillum</i> Promotes Early Nodulation

Co-Inoculation of Soybean with <i>Bradyrhizobium</i> and <i>Azospirillum</i> Promotes Early Nodulation

Effects of mineral and biofertilizers on barley growth on compacted soil

ENHANCEMENT OF NUTRIENTS UPTAKE BY LUPIN (Lupinus Albus L.) PLANT INOCULATED WITH BACTERIA AND IRRIGATED WITH SALINE WATER

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Dual inoculation with strains of Bradyrhizobium japonicum and Azospirillum brasilense to improve growth and biological nitrogen fixation of soybean (Glycine max L.)

Cited by 13 publications

References 12 publications

Co-Inoculation of Soybean with &lt;i&gt;Bradyrhizobium&lt;/i&gt; and &lt;i&gt;Azospirillum&lt;/i&gt; Promotes Early Nodulation

Co-Inoculation of Soybean with &lt;i&gt;Bradyrhizobium&lt;/i&gt; and &lt;i&gt;Azospirillum&lt;/i&gt; Promotes Early Nodulation

Effects of mineral and biofertilizers on barley growth on compacted soil

ENHANCEMENT OF NUTRIENTS UPTAKE BY LUPIN (Lupinus Albus L.) PLANT INOCULATED WITH BACTERIA AND IRRIGATED WITH SALINE WATER

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Co-Inoculation of Soybean with <i>Bradyrhizobium</i> and <i>Azospirillum</i> Promotes Early Nodulation

Co-Inoculation of Soybean with <i>Bradyrhizobium</i> and <i>Azospirillum</i> Promotes Early Nodulation