Isolation and characterization of N-fixing and IAA producing rhizobacteria from two rice field agro-ecosystems in South Sulawesi, Indonesia

Haerani, Nining; Syam’un, Elkawakib; Rasyid, Burhanuddin; Haring, Feranita

doi:10.13057/biodiv/d220506

Cited by 7 publications

(3 citation statements)

References 29 publications

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“…The most common phytohormones are auxins, gibberellins, and cytokinin. Although very small amounts of phytohormones are produced by PGPR, they are still very crucial for plant metabolic processes, including those that modulate plant growth (e.g., Kalimuthu et al, 2019;Haerani et al, 2021) and plant tolerance to various abiotic stresses (Mahmoody and Noori, 2014;Santhi et al, 2021). Among the most potential PGPR that can function as biofertilizers due to phytohormone production are Azospirillum (e.g., Coniglio et al, 2019) and Bacillus spp.…”

Section: Phytostimulatorsmentioning

confidence: 99%

Plant growth-promoting rhizobacterial biofertilizers for crop production: The past, present, and future

et al. 2022

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Recent decades have witnessed increased agricultural production to match the global demand for food fueled by population increase. Conventional agricultural practices are heavily reliant on artificial fertilizers that have numerous human and environmental health effects. Cognizant of this, sustainability researchers and environmentalists have increased their focus on other crop fertilization mechanisms. Biofertilizers are microbial formulations constituted of indigenous plant growth-promoting rhizobacteria (PGPR) that directly or indirectly promote plant growth through the solubilization of soil nutrients, and the production of plant growth-stimulating hormones and iron-sequestering metabolites called siderophores. Biofertilizers have continually been studied, recommended, and even successfully adopted for the production of many crops in the world. These microbial products hold massive potential as sustainable crop production tools, especially in the wake of climate change that is partly fueled by artificial fertilizers. Despite the growing interest in the technology, its full potential has not yet been achieved and utilization still seems to be in infancy. There is a need to shed light on the past, current, and future prospects of biofertilizers to increase their understanding and utility. This review evaluates the history of PGPR biofertilizers, assesses their present utilization, and critically advocates their future in sustainable crop production. It, therefore, updates our understanding of the evolution of PGPR biofertilizers in crop production. Such information can facilitate the evaluation of their potential and ultimately pave the way for increased exploitation.

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Section: Phytostimulatorsmentioning

confidence: 99%

Plant growth-promoting rhizobacterial biofertilizers for crop production: The past, present, and future

et al. 2022

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“…Nitrogen fixing bacteria that live in the rhizosphere are microorganisms that can increase the availability of N for plants in a non-symbiotic manner. Nitrogen-fixing bacteria also support growth through the production of growth hormones (Haerani et al 2021) As a biofertilizer for plants, PGPR is a biological fertilizer capable of providing nutrients for plant growth. Plants can grow optimally and have resistance to pests, diseases, and stresses from the environment.…”

Section: Mulberry Leaf Area Increase Rate Per Weekmentioning

confidence: 99%

Potential of rhizobacterial consortium in increasing area and weight of mulberry leaves (Morus indica)

et al. 2022

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Abstract. Mustaka Z, Patandjengi B, Alam G, Melina. 2022. Potential of rhizobacterial consortium in increasing area and weight of mulberry leaves (Morus indica). Biodiversitas 23: 1369-1374. Rhizobacteria are a group of bacteria that live saprophytically in the rhizosphere area. Some of them can act as plant growth promoters and as biocontrol agents against diseases to increase crop yields. This study was conducted to find potential of the rhizobacteria consortium in various treatments to increase the area and weight of mulberry (Morus indica L.) leaves. Results showed that the rhizobacteria consortium formulation had a significant effect on increasing leaf area and weight. The percentage increase in leaf area in the treatment using the MKR15 rhizobacteria consortium was better at 39.28% (2,800 mm2) when compared to the control MK0t (1,700 mm2), and the percentage increase in MKR15 leaf weight (74.80 g) was 54.54% higher compared to control MK0t (34 g). With these results, it is clear that the rhizobacteria consortium as PGPR affects plant growth and nutrition in a very specific way involving bacterial components that induce plant responses. Molecules of PGPR can affect plants in complex mechanisms, sometimes affecting plant growth and nutrition, and resistance simultaneously.

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“…Use of beneficial microbes help in improving soil texture and structure by increasing its aggregation and stability (Rashid et al 2016). Their in agricultural cultivation has become a trend for many researchers, especially in relation to plant growth boosters that play a role in dissolving potassium and phosphate (Jaya et al 2021;Siddiqui et al 2021;Gupta et al 2021;Sherpa et al 2021), production of phytohormones and siderophores (Sudewi et al 2021;Tamreihao et al 2022;Maulina et al 2022;Nguyen et al 2022) and fixation of nitrogen (Haerani et al 2021;Zhang et al 2022;Khatun et al 2021;Setiawati et al 2022). Microbes can also increase plant resistance to pests and diseases by producing antagonistic compounds (Al-Ani et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Microbial exploration from two different ecosystems in Central Sulawesi, Indonesia

et al. 2022

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Abstract. Ratnawati, Sudewi S, Jaya K, Saleh AR. 2022. Microbial exploration from two different ecosystems in Central Sulawesi, Indonesia. Biodiversitas 23: 6191-6198. A supportive growing environment and the presence of microbes in the soil are considered good habitats for plant growth. Endophytic microbes live in symbiosis (mutual benefit) with their host plants, both in the stem and root tissues of plants, providing defense services in biotic and abiotic stress situations. This study was aimed to identify various microbes that exist in various agricultural cultivation ecosystems in Central Sulawesi. Microbial sampling was obtained from healthy plant tissues (endophytes) and rhizosphere in lowland rice and shallot plantation ecosystems. The sample obtained was then weighed as much as 5 g and surface sterilized for further isolation by serial dilution method to be spread on NA (Nutrient Agar) media for bacteria, and PDA (Potato Dextrose Agar) for fungi. The microbes that had grown were re-isolated to obtain pure isolate culture of microbes. The results showed that 8 isolates from the rhizosphere and 4 isolates as endophytes in the ecosystem of organic rice fields were recorded. The fungal isolates from the shallot plantation “Lembah Palu” found as many as 12 isolates from rhizosphere and 4 isolates as endophytes. The results of macroscopic and microscopic characteristics on fungal isolates identified as the species of Trichoderma, Fusarium, Penicillium, Gliocladium and Aspergillus.

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Isolation and characterization of N-fixing and IAA producing rhizobacteria from two rice field agro-ecosystems in South Sulawesi, Indonesia

Cited by 7 publications

References 29 publications

Plant growth-promoting rhizobacterial biofertilizers for crop production: The past, present, and future

Plant growth-promoting rhizobacterial biofertilizers for crop production: The past, present, and future

Potential of rhizobacterial consortium in increasing area and weight of mulberry leaves (Morus indica)

Microbial exploration from two different ecosystems in Central Sulawesi, Indonesia

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