Production of Plant Growth Regulators by Rhizosphere Phosphate‐solubilizing Bacteria

Barea, J. M.; Navarro, E.; Montoya, E.

doi:10.1111/j.1365-2672.1976.tb04161.x

Cited by 161 publications

(68 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The production of plant growth-regulators by many bacterial species and their effect on plant growth was reported more than 30 years ago (Barea et al 1976). Microbial inoculants, such as PGPR, can alter root architecture and promote plant development via the production or degradation of the major groups of plant hormones (Bhattacharyya and Jha 2012;Dodd et al 2010;Idris et al 2007).…”

Section: Plant Growth Promotion Resulting From Better Nutrient Uptakementioning

confidence: 99%

Agricultural uses of plant biostimulants

2014

View full text Add to dashboard Cite

Background Plant biostimulants are diverse substances and microorganisms used to enhance plant growth. The global market for biostimulants is projected to increase 12 % per year and reach over $2,200 million by 2018. Despite the growing use of biostimulants in agriculture, many in the scientific community consider biostimulants to be lacking peer-reviewed scientific evaluation. Scope This article describes the emerging definitions of biostimulants and reviews the literature on five categories of biostimulants: i. microbial inoculants, ii. humic acids, iii. fulvic acids, iv. protein hydrolysates and amino acids, and v. seaweed extracts.Conclusions The large number of publications cited for each category of biostimulants demonstrates that there is growing scientific evidence supporting the use of biostimulants as agricultural inputs on diverse plant species. The cited literature also reveals some commonalities in plant responses to different biostimulants, such as increased root growth, enhanced nutrient uptake, and stress tolerance.

show abstract

Section: Plant Growth Promotion Resulting From Better Nutrient Uptakementioning

confidence: 99%

Agricultural uses of plant biostimulants

2014

View full text Add to dashboard Cite

show abstract

“…Barea et al (1976) reported that among 50 bacterial isolates obtained from the rhizosphere of various plants, 86, 58 and 90% isolates produced auxins, gibberellins and kinetin-like substances, respectively. The production of phytohormones has also been reported in other PGPR strains including Azotobacter chroococcum (Muller et al, 1989), Azospirillum spp.…”

Section: Fifty Five Bacterial Isolates Representingmentioning

confidence: 99%

Growth stimulation of clusterbean (Cyamopsis tetragonoloba) by coinoculation with rhizosphere bacteria and Rhizobium

Chaudhary

Sindhu

2016

View full text Add to dashboard Cite

Clusterbean [Cyamopsis tetragonoloba (L.) Taub.] is an important commercially utilizable crop grown in arid zone of India. Microorganisms present in the rhizosphere of this crop produce various plant growth-promoting substances and enhance the availability of nutrients to the plants. Therefore, fifty five bacterial isolates obtained from the rhizosphere of clusterbean were explored for beneficial characteristics. Twenty rhizobacterial isolates produced indole acetic acid ranging from 3.9 to 24.7 µg/mL. Only six isolates HCS7, HCS19, HFS7, HFS9, HFS10 and HFS12 showed d-aminolevulinic acid production varying from 1.3 to 7.0 µg/mL. Fourteen isolates showed solubilization of potassium on mica containing Aleksandrov medium plates. Stimulation of root and shoot growth of clusterbean seedlings on water agar plates was observed by inoculation of eleven rhizobacterial isolates at 5 and 10 days of growth whereas some isolates showed stunting effect on the growth of shoot and root as compared to uninoculated seedlings. At 60 days of plant growth, inoculation of Bradyrhizobium strain GSA11 and Rhizobium strain GSA110 showed significant nodulation and their inoculation resulted in 141.94 and 151.43% gains in shoot dry weight, respectively under chillum jar conditions. Coinoculation of Bacillus isolate HCS43 with Rhizobium strain GSA110 formed 48 nodules/plant and plant dry weight was enhanced by 190.09% in comparison to uninoculated control plants.

show abstract

“…조절인자인 식물호르몬 (phytohormone)을 생산함에 따라 나 타나며 식물성장 관련 식물 호르몬들로는 auxin, gibberellin, cytokinin 등이 알려져 있다 (Barea et al, 1976;Glick, 1995).…”

Section: 이와 같은 Pgpr 세균의 식물성장촉진 기능은 식물생육unclassified

Optimization of Indole-3-acetic Acid (IAA) Production by Bacillus megaterium BM5

Lee¹,

Whang²

2016

Korean Journal of Soil Science and Fertilizer

View full text Add to dashboard Cite

One of the important phytohormones produced by plant growth promoting bacteria is the auxin; indole-3-acetic acid (IAA), with L-tryptophan as the precursor. In this study, we focused on the investigation of optimal conditions for the production of IAA by Bacillus megaterium BM5. We investigated culturing conditions, such as incubation temperature, pH of the culture medium and incubation period, with varying media components such as inoculation volume, tryptophan concentration and carbon and nitrogen source. Besides, optimization study intended for high IAA production was carried out with fermentation parameters such as rpm and aeration. The initial yield of 42 μg IAA ml -1 after 24 hr increased to 85 μg ml -1 when 5% (v/v) of L-tryptophan was used in the culture broth. The maximum yield of 320 μg IAA ml -1 was observed in trypticase soy broth (TSB) supplemented with starch and soybean meal as C and N sources with a C/N ratio of 3:1 (v/v) at 30°C, pH 8.0 for 48 hrs with 1.0 vvm and 250 rpm in 5 L working volume using 10 L scale fermenter. The bacterial auxin extracted from the culture broth was confirmed by thin layer chromatography and high-performance liquid chromatography and effect on plant growth was confirmed by root elongation test.Key words: Indole-3-acetic acid, Auxin, Tryptophan, OptimizationProduction of indole-3-acetic acid (IAA) was increased by Bacillus megaterium BM5 with optimal fermentation condition (ca. 8-fold improved).

show abstract

Production of Plant Growth Regulators by Rhizosphere Phosphate‐solubilizing Bacteria

Cited by 161 publications

References 17 publications

Agricultural uses of plant biostimulants

Agricultural uses of plant biostimulants

Growth stimulation of clusterbean (Cyamopsis tetragonoloba) by coinoculation with rhizosphere bacteria and Rhizobium

Optimization of Indole-3-acetic Acid (IAA) Production by Bacillus megaterium BM5

Contact Info

Product

Resources

About