Plant growth promoting activity of an auxin and siderophore producing isolate of Streptomyces under saline soil conditions

Sadeghi, Akram; Karimi, Ebrahim; Dahaji, Payman Abbaszadeh; Javid, Majid Ghorbani; Dalvand, Yadola; Askari, Hossein

doi:10.1007/s11274-011-0952-7

Cited by 283 publications

(174 citation statements)

References 33 publications

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“…The capability of auxin synthesis detected in many bacterial strains from the genera Azospirillium, Pseudomonas, Bacillus, etc., is thought to underlie the activation of plant root growth by these microorganisms [81]. Sadeghi et al demonstrated that a Streptomyces isolate increased plant growth in wheat and produced indole acetic acid and auxin in presence of salt [85]. Phytohormone-producing Bacillus sp.…”

Section: Production Of Plant Hormones and Other Beneficial Plant Metamentioning

confidence: 99%

The Role of Soil Beneficial Bacteria in Wheat Production: A Review

Çakmakçı¹,

Turan²,

Kıtır³

et al. 2017

Wheat Improvement, Management and Utilization

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Free-living plant growth-promoting rhizobacteria (PGPR) have favourable effect on plant growth, tolerance against stresses and are considered as a promising alternative to inorganic fertilizer for promoting plant growth, yield and quality. PGPR colonize at the plant root, increase germination rates, promote root growth, yield, leaf area, chlorophyll content, nitrogen content, protein content, tolerance to drought, shoot and root weight, and delayed leaf senescence. Several important bacterial characteristics, such as biological nitrogen fixation, solubilization of inorganic phosphate and mineralization of organic phosphate, nutrient uptake, 1-aminocydopropane-1-carboxylic acid (ACC) deaminase activity and production of siderophores and phytohormones, can be assessed as plant growth promotion traits. By efficient use, PGPR is expected to contribute to agronomic efficiency, chiefly by decreasing costs and environmental pollution, by eliminating harmful chemicals. This review discusses various bacteria acting as PGPR, their genetic diversity, screening strategies, working principles, applications for wheat and future aspects in terms of efficiency, mechanisms and the desirable properties. The elucidation of the diverse mechanisms will enable microorganisms developing agriculture further.

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Section: Production Of Plant Hormones and Other Beneficial Plant Metamentioning

confidence: 99%

The Role of Soil Beneficial Bacteria in Wheat Production: A Review

Çakmakçı¹,

Turan²,

Kıtır³

et al. 2017

Wheat Improvement, Management and Utilization

View full text Add to dashboard Cite

show abstract

“…The ability of Streptomyces to tolerate abiotic stresses including salinity, pH, and temperature and antibiotics and fungicide tolerance are widely reported (Waksman 1959, Gopalakrishnan et al 2012aSadeghi et al 2012). Consequently, it can be stated that these strains have the capability to survive in harsh environments and can be used in the integrated disease management programs.…”

Section: Discussionmentioning

confidence: 99%

“…Streptomyces are a group of Gram-positive bacteria, with high G + C content belonging to the order Actinomycetales, which form branched mycelia and hence sometimes been classified as fungi imperfecti. Plant growth promotion potential of Streptomyces was reported on bean (Nassar et al 2003), tomato (El-Tarabily 2008), pea (Tokala et al 2002), wheat (Sadeghi et al 2012) and rice (Gopalakrishnan et al 2012a, b). Streptomyces promote plant growth either by producing indole-3-acetic acid (Aldesuquy et al 1998) or siderophores (Tokala et al 2002).…”

Section: Introductionmentioning

confidence: 99%

Evaluation ofStreptomycesspp. for their plant-growth-promotion traits in rice

et al. 2013

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Five strains of Streptomyces were earlier reported to have potential for charcoal rot control and plant growth promotion (PGP) in sorghum. In this study, those five Streptomyces strains were characterized for their enzymatic activities and evaluated for their PGP capabilities on rice. All the Streptomyces were able to produce lipase, β-1,3-glucanase, grew in NaCl (up to 8%), at pH 5−13, temperatures 20−40 o C and were resistant to ampicillin, sensitive to nalidixic acid and highly sensitive to chloramphenicol, kanamycin, streptomycin and tetracycline. They were highly tolerant to fungicide bavistin, whereas highly sensitive to benlate, benomyl and radonil. When evaluated on rice in the field, the Streptomyces significantly enhanced tillers, panicles, stover yield, grain yield, dry matter, root length, volume and dry weight over the control. In the rhizosphere at harvest, microbial biomass carbon and nitrogen, dehydrogenase activity, total N, available P and % organic carbon were also found significantly higher in Streptomyces treated plots over the control. This study further confirms that the selected Streptomyces have PGP activities.

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“…In the rhizo sphere soils, root exudates are the natural source of tryptophan for rhizosphere microorganisms, which may enhance auxin (IAA) biosynthesis in the rhizos phere. Likewise Sadeghi et al (2012) have also reported the production of IAA and siderophore by halotolerant Streptomycetes isolate. Siderophore production may be involved in the inhibition of pathogens and thus pro mote plant growth indirectly because Streptomyces species are known for the production of hydroxamate type siderophores, which inhibit phytopathogen growth by competing for iron in rhizosphere soils (Khamna et al, 2009; Kaur et al, 2013), thus our isolates could be involved in the inhibition of pathogens.…”

mentioning

confidence: 86%

“…Kavya et al (2012), also reported salinity tolerance of Streptomycetes from Coringa man grove ecosystem but their results indicated a tolerance of 3-4% NaCl concentration, which is less as compared to isolates under current study. Sadeghi et al (2012) have reported the beneficial role of Streptomyces on PGP activity under salinity stress. Hence, it can be con cluded that these strains may have the ability to survive in the harsh environments such as saline and acidic to alkaline pH soils.…”

mentioning

confidence: 99%

Isolation and Characterization of Streptomycetes with Plant Growth Promoting Potential from Mangrove Ecosystem

Shrivastava¹,

Kumar²,

Yandigeri³

et al. 2015

Pol J Microbiol

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A b s t r a c tA total of 66 actinomycetes isolates were isolated from mangroves of Andhra Pradesh, India, using various enrichment techniques and pre treatments. The samples were collected from Coringa mangrove ecosystem and pretreated by enrichment with CaCO 3 , sodium dodecyl sulphate and phenol, plated on the media supplemented with cycloheximide (50 mg/ml), nystatin (25 mg/ml) and nalidixic acid (50 mg/ml). The population count of actinomycetes fluctuated from 1.9 × 10 5 to 8.0 × 10 5 /g soil. Out of the isolated 66 actinomycetes, 8 isolates pos sessing plant growth promoting potential were further studied and characterized by physiological and biochemical traits and identified by 16S rRNA gene sequencing as different species of Streptomycetes genera. 340actinomycetes, bacteria and fungi, and fungi and actino mycetes (Rathna Kala, 1995). However, across the globe, the world's mangroves are threatened. Mangrove habitats are being destroyed as rivers are dammed, their waters diverted and the intertidal zone extensively developed for agriculture or aquaculture. Previous study showed that actinomycetes isolated from Malay sian soil have the potential to inhibit the growth of plant pathogens (Jeffrey et al., 2007). Likewise actinomycetes isolated from Turkey's farming soil have the ability to inhibit Erwinia amylovora a bacteria that cause fireb light to apple and Agrobacterium tumefaciens a causal agent of Crown Gall disease (Oskay et al., 2004). Besides acting agents for control of plant pathogens they also possess the capability for plant growth pro motion (Nassar et al., 2003; da Silva Sousa et al., 2008). This is due to their capacity to produce IAA, antibiotics, siderophores, enzymes that have antimicrobial activity, substances that promote plant growth, solubilization of phosphates and competition with plant pathogens for substratum and nutrients (Hamdali et al., 2008; da Silva Sousa et al., 2008).The present study aims at isolation of actinomycetes from mangrove ecosystem of Andhra Pradesh, India and to evaluate their plant growth promoting potential by siderophore and IAA production assay. The study also focusses on the genetic diversity study of the plant growth promoting isolates on the basis of morphophy sio logical, biochemical and molecular characteristics. Experimental Materials and MethodsSoil sampling. A total of 10 soil samples and one water sample were collected from the Mangrove eco system of Kakinada District, Coringa (latitude 16°44´ to 16°53´N and longitude 82°14´ to 82°22´E), Andhra Pradesh, India by systematic sampling method. Samples were collected from 15 cm depth and transported to the laboratory in sterile bags and airdried at room tem perature. The geographical locations, as well as physio chemical properties of samples were recorded (Table I).Isolation of actinomycetes. Samples were sub jected to various enrichment techniques like CaCO 3 (Tsao et al., 1960), SDS (Hayakawa and Nonomura, 1989), phenol (Hayakawa et al., 2004), and media such as, Starch Casein Agar (SCA), Actinomyce...

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Plant growth promoting activity of an auxin and siderophore producing isolate of Streptomyces under saline soil conditions

Cited by 283 publications

References 33 publications

The Role of Soil Beneficial Bacteria in Wheat Production: A Review

The Role of Soil Beneficial Bacteria in Wheat Production: A Review

Evaluation ofStreptomycesspp. for their plant-growth-promotion traits in rice

Isolation and Characterization of Streptomycetes with Plant Growth Promoting Potential from Mangrove Ecosystem

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