Growth and Yield Response of Upland Rice to Application of Plant Growth-Promoting Rhizobacteria

Cavite, Harry Jay; Mactal, Ariel G.; Evangelista, Editha V.; Cruz, Jayvee A.

doi:10.1007/s00344-020-10114-3

Cited by 42 publications

(32 citation statements)

References 48 publications

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“…Bacterial genera belonging to the phyla Proteobacteria, including Acidovorax [ 185 ], Rhizobium [ 141 , 186 ], Burkholderia [ 187 , 188 ], Serratia [ 189 ], Azotobacter [ 190 ], Klebsiella [ 188 ], Alcaligenes [ 191 ], Ochrobactrum [ 191 ], Pseudacidovorax [ 192 ], Azospirillum [ 192 , 193 ], and Herbaspirillum [ 192 , 193 ], have all been proven to be effective in improving rice growth and yield. Other bacterial genera belonging to the phylum Proteobacteria ( Acinetobacter and Pantoea ) and Firmicutes ( Staphylococcus , Oceanobacillus , and Paenibacillus ) have been reported as PGPB and showed antagonistic effects against X. oryzae pv.…”

Section: The Pgpb As Biocontrol Agentmentioning

confidence: 99%

Plant Growth-Promoting Bacteria as an Emerging Tool to Manage Bacterial Rice Pathogens

et al. 2021

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As a major food crop, rice (Oryza sativa) is produced and consumed by nearly 90% of the population in Asia with less than 9% produced outside Asia. Hence, reports on large scale grain losses were alarming and resulted in a heightened awareness on the importance of rice plants’ health and increased interest against phytopathogens in rice. To serve this interest, this review will provide a summary on bacterial rice pathogens, which can potentially be controlled by plant growth-promoting bacteria (PGPB). Additionally, this review highlights PGPB-mediated functional traits, including biocontrol of bacterial rice pathogens and enhancement of rice plant’s growth. Currently, a plethora of recent studies address the use of PGPB to combat bacterial rice pathogens in an attempt to replace existing methods of chemical fertilizers and pesticides that often lead to environmental pollutions. As a tool to combat bacterial rice pathogens, PGPB presented itself as a promising alternative in improving rice plants’ health and simultaneously controlling bacterial rice pathogens in vitro and in the field/greenhouse studies. PGPB, such as Bacillus, Pseudomonas, Enterobacter, Streptomyces, are now very well-known. Applications of PGPB as bioformulations are found to be effective in improving rice productivity and provide an eco-friendly alternative to agroecosystems.

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Section: The Pgpb As Biocontrol Agentmentioning

confidence: 99%

Plant Growth-Promoting Bacteria as an Emerging Tool to Manage Bacterial Rice Pathogens

et al. 2021

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“…Cavite et al [18] isolated 25 bacterial species from the rhizosphere of upland rice which exhibited plant growthpromoting activities in vitro. They showed that Acidovorax delafieldii and half dose of chemical fertilizer promoted the growth of upland rice with enhanced root fresh weight, shoot and root dry weight, grain yield, and NPK uptake.…”

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confidence: 99%

“…There are numerous reports on the beneficial effects of microbial inoculation in the traditional puddled rice cultivation systems [20,21]. The research on the bioprospecting of microbial inoculants in rice for upland system of cultivation is in its infancy stage [15,18,22], however, in the case of ARS, this literature is meager. The exploration of the composition and characteristics of the rhizospheric bacteria from rice genotypes under aerobic conditions is lacking.…”

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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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“…They use ACC as a source of nitrogen and energy, converting it into ammonia and α -ketobutyrate to prevent the accumulation of ethylene and strengthen the root system to cope with environmental stress [ 8 ]. Inoculation of IAA-producing bacteria can promote the formation of lateral roots and root hairs and can improve the tolerance of plants to salinity [ 9 ]. Previous research has indicated that the application of Bacillus subtilis GOT9 leads to increased salt stress tolerance of Arabidopsis and effectively reduced the damage of salt stress to plants [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Salt-Tolerant Antagonistic Bacteria CZ-6 on the Rhizosphere Microbial Community of Winter Jujube (Ziziphus jujuba Mill. “Dongzao”) in Saline-Alkali Land

Zhou

Hao

et al. 2021

BioMed Research International

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As the main economic crop cultivated in the Yellow River Delta, winter jujube contains various nutrients. However, soil salinization and fungal diseases have affected the yield and quality of winter jujube. In order to use plant growth-promoting rhizobacteria (PGPR) to reduce these damages, the antagonistic bacteria CZ-6 isolated from the rhizosphere of wheat in saline soil was selected for experiment. Gene sequencing analysis identified CZ-6 as Bacillus amyloliquefaciens. In order to understand the salt tolerant and disease-resistant effects of CZ-6 strain, determination of related indicators of salt tolerance, pathogen antagonistic tests, and anti-fungal mechanism analyses was carried out. A pot experiment was conducted to evaluate the effect of CZ-6 inoculation on the rhizosphere microbial community of winter jujube. The salt tolerance test showed that CZ-6 strain can survive in a medium with a NaCl concentration of 10% and produces indole acetic acid (IAA) and 1-aminocyclopropane-1-carboxylic acid (ACC) deaminase. Studies on the inhibition mechanism of pathogenic fungi show that CZ-6 can secrete cellulase, protease, and xylanase. Gas chromatography-mass spectrometry (GC-MS) analysis showed that CZ-6 can release volatile organic compounds (VOCs), including 2-heptanone and 2-nonanone. In addition, the strain can colonize the rhizosphere and migrate to the roots, stems, and leaves of winter jujube, which is essential for plant growth or defense against pathogens. Illumina MiSeq sequencing data indicated that, compared to the control, the abundance of salt-tolerant bacteria Tausonia in the CZ-6 strain treatment group was significantly increased, while the richness of Chaetomium and Gibberella pathogens was significantly reduced. Our research shows that CZ-6 has the potential as a biological control agent in saline soil. Plant damage and economic losses caused by pathogenic fungi and salt stress are expected to be alleviated by the addition of salt-tolerant antagonistic bacteria.

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Growth and Yield Response of Upland Rice to Application of Plant Growth-Promoting Rhizobacteria

Cited by 42 publications

References 48 publications

Plant Growth-Promoting Bacteria as an Emerging Tool to Manage Bacterial Rice Pathogens

Plant Growth-Promoting Bacteria as an Emerging Tool to Manage Bacterial Rice Pathogens

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

The Effect of Salt-Tolerant Antagonistic Bacteria CZ-6 on the Rhizosphere Microbial Community of Winter Jujube (Ziziphus jujuba Mill. “Dongzao”) in Saline-Alkali Land

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