Inoculation of bacterial consortium increases rice yield (Oryza sativa L.) reducing applications of nitrogen fertilizer in San Martin region, Peru

Ríos-Ruiz, Winston Franz; Torres-Chávez, Edson E.; Torres-Delgado, Jorge; Rojas-García, José; Bedmar, Eulogio J.; Valdez-Nuñez, Renzo Alfredo

doi:10.1016/j.rhisph.2020.100200

Cited by 30 publications

(18 citation statements)

References 76 publications

(86 reference statements)

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“…These rhizobacteria can influence plant growth and development through increasing nutrient acquisition, manipulating plant hormone levels, survival in stress conditions and inhibition of plant pathogens [32]. The effect of PGPR on the growth of rice is well documented under screen house and field conditions [6,33,34]. This study is the first demonstration of the beneficial effects of the selected rhizobacteria P. protegens on rice varieties under aerobic conditions.…”

Section: Discussionmentioning

confidence: 78%

“…Many authors have reported that growth promotion of upland rice through IAA synthesizing bacteria [33]. Higher crop yield is a result of higher shoot dry weight, number of tillers, number of panicles, number of grains per panicles and weight of 1000 seeds, which in turn is a consequence of biosynthesis of plant hormones auxins and gibberellins [34].…”

Section: Discussionmentioning

confidence: 99%

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Bioprospecting plant growth‐promoting rhizobacteria from rice genotypes and their influence on growth under aerobic conditions

et al. 2021

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The bacteria that colonize plant roots and enhance plant growth by various mechanisms are known as plant growth-promoting rhizobacteria (PGPR). The functions of rhizobacteria stand substantially unexplored and detailed insights into the aerobic rice ecosystem are yet to be examined. In this study, we have isolated rhizobacteria from rice varieties grown under aerobic conditions. Seed germination test showed that strain Ekn 03 was significantly effective in stimulating germination, enhancing shoot and root length, and increasing dry matter accumulation in treated rice plants as compared to the uninoculated plants. Under greenhouse conditions, strain Ekn 03 treated rice varieties showed an overall increase in plant height by 7.63%, dry matter accumulation by 16.23%, and total chlorophyll content by 76.47%. Soil acetylene reduction assay (ARA) (4.17 nmole ethylene/g soil/h) and in-planta ARA (4.2 × 10 −2 nmole ethylene/mg fresh weight of plant/h) was significantly higher in Ekn 03 treated rice variety PB 1509 under aerobic conditions. Other rice varieties showed comparable performance on inoculation with strain Ekn 03. The endophytic and rhizospheric population of antibiotic tagged Ekn 03 was higher in the roots of PB 1509 (1.02 × 10 4 cfu/g and 5.8 × 10 5 cfu/g soil, respectively) compared to other rice varieties. 16S rDNA sequence analysis revealed that strain Ekn 03 was having 100% similarity with Pseudomonas protegens. This study suggests that strain Ekn 03 can be used as a microbial inoculant in rice plants under aerobic system of cultivation. This is the first report on the application of P. protegens as PGPR in rice.

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Section: Discussionmentioning

confidence: 78%

Section: Discussionmentioning

confidence: 99%

Bioprospecting plant growth‐promoting rhizobacteria from rice genotypes and their influence on growth under aerobic conditions

et al. 2021

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“…The use of microorganisms with the capacity to promote plant growth constitutes a sustainable option for increasing crop production. For rice cultivation, various microorganisms that use direct growth-promoting mechanisms, such as biological nitrogen fixation, indole acetic acid production, inorganic phosphate solubilization, and the presence of 1-aminocyclopropane-1-carboxylate deaminase (ACCD) activity, among others, have been reported [ 10 ], including through the use of multi-omics technologies [ 9 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

Co-Inoculation of Endophytes Bacillus siamensis TUR07-02b and Priestia megaterium SMBH14-02 Promotes Growth in Rice with Low Doses of Nitrogen Fertilizer

Ríos-Ruiz

Tuanama-Reátegui

Huamán-Córdova

et al. 2023

Plants

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Multiple biotic and abiotic factors influence rice cultivation. These factors limit productivity and yield, as well as an irrational use of agrochemicals in rice cultivation. A sustainable alternative is using selected growth-promoting microorganisms to increase nutritional efficiency. In the present study, the direct mechanisms of growth promotion in two strains of Bacillus, three strains of Priestia, and two strains of Burkholderia endophytes of rice were characterized. Bacillus siamensis TUR07-02b and Priestia megaterium SMBH14-02 were selected to promote Oryza sativa var’s growth. “Bellavista” was used at different doses (50, 75, and 100%) of mineral nitrogen (N) using a randomized block design by quintuplicate. Both strains, SMBH14-02 and TUR07-02b, presented outstanding promoter characteristics, including auxin production (123.17 and 335.65 μg mL−1, respectively) and biological nitrogen fixation capacity. Similarly, B. siamensis TUR07-02b could solubilize phosphate-Ca (20.94 μg mL−1), cellulases, and pectinases. Under greenhouse conditions, co-inoculated plants receiving 75% of the total dose of mineral nitrogen showed increased agronomic parameters in relation to panicle length, grains per panicle, grain yield, and harvest index by 25.0, 30.7, 39.5, and 12.5%, respectively, compared to the 75% fertilized treatment without inoculation. The strains of B. siamensis TUR07-02b and P. megaterium SMBH14-02 are potential microbial resources in the formulation of new inoculants to reduce the use of nitrogenous fertilizers. Thus, agronomic validation of the inoculant consortium at the field level will be an essential step in providing an alternative for the sustainable management of rice cultivation and increased productivity of rice farmers in the San Martín region.

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“…Nevertheless, co-inoculation of non-antagonistic bacteria is found significant, contributing to plant performance in terms of quality and quantity than single inoculation. Notwithstanding, Subramanian et al [ 17 ] and Ríos-Ruiz et al [ 18 ] have reported an improvement in the yield of soybean co-inoculated with endophytic Bradyrhizobium japonicum and Bacillus megaterium and rice yields inoculated with endophytic Burkholderia ubonensis, Citrobacter bitternis, and Burkholderia vietnamiensis , respectively.…”

Section: Introductionmentioning

confidence: 99%

Genomic Analysis of Endophytic Bacillus cereus T4S and Its Plant Growth-Promoting Traits

Adeleke

Babalola

2021

Plants

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Insights into plant endophytic microbes and their exploration in agriculture have provided opportunities for sustainable plant health and food safety. Notable endophytic Bacillus species with plant growth-promoting traits have been documented; nevertheless, information on genome analysis of B. cereus associated with the sunflower in South Africa has not been studied. Therefore, we present whole-genome sequence of agriculturally important B. cereus strain T4S isolated from sunflower plants. The NextSeq Illumina sequencing yielded 7,255,762 bp sequence reads, 151 bp average read length, 5,945,881 bp genome size, 56 tRNA, 63 rRNA, and G + C content of 34.8%. The phylogeny analysis of strain T4S was similar to B. cereus NJ-W. Secondary metabolites, such as petrobactin, bacillibactin, bacitracin, molybdenum factor, zwittermicin, and fengycin underlining bacterial biocontrol efficacy against phytopathogens were found in the T4S genome. The predicted novel genes in the bacterial genome mediating the complex metabolic pathways can provide a genetic basis in understanding endosphere biology and their multiple functions thereof in crop improvement. Interestingly, seed and root inoculation with strain T4S contributed to sunflower yield under greenhouse experiments. Hence, the detection of notable genes specific for plant growth promotion as validated under in vitro screening, promisingly, suggests the relevance of strain T4S in agricultural biotechnology.

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Inoculation of bacterial consortium increases rice yield (Oryza sativa L.) reducing applications of nitrogen fertilizer in San Martin region, Peru

Cited by 30 publications

References 76 publications

Bioprospecting plant growth‐promoting rhizobacteria from rice genotypes and their influence on growth under aerobic conditions

Bioprospecting plant growth‐promoting rhizobacteria from rice genotypes and their influence on growth under aerobic conditions

Co-Inoculation of Endophytes Bacillus siamensis TUR07-02b and Priestia megaterium SMBH14-02 Promotes Growth in Rice with Low Doses of Nitrogen Fertilizer

Genomic Analysis of Endophytic Bacillus cereus T4S and Its Plant Growth-Promoting Traits

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