Drought-tolerant endophytic actinobacteria promote growth of wheat (Triticum aestivum) under water stress conditions

Yandigeri, Mahesh S.; Meena, Kamlesh K.; Singh, D. P.; Malviya, Nityanand; Singh, Dhananjaya P.; Solanki, Manoj Kumar; Yadav, Arvind Kumar; Arora, Dilip K.

doi:10.1007/s10725-012-9730-2

Cited by 222 publications

(125 citation statements)

References 38 publications

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“…Drought tolerant endophytic actinobacteria, Streptomyces coelicolor DE07, Streptomyces olivaceus DE10, and Streptomyces geysiriensis DE27, with intrinsic water stress tolerance from -0.05 to -0.73 MPa and IAA production were isolated from arid and drought affected regions. Co-inoculation of endophytes DE10 and DE27 recorded the highest yield in wheat (Yandigeri et al 2012). In addition, induction of higher osmotic pressure of plant cells, callose accumulation, and cell wall lignification as a strategy for drought tolerance has been documented for Streptomyces padanus (Hasegawa et al 2004(Hasegawa et al , 2005.…”

Section: Pgp Actinobacteria As Stress Relieversmentioning

confidence: 99%

Plant growth-promoting actinobacteria: a new strategy for enhancing sustainable production and protection of grain legumes

2017

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Grain legumes are a cost-effective alternative for the animal protein in improving the diets of the poor in South-East Asia and Africa. Legumes, through symbiotic nitrogen fixation, meet a major part of their own N demand and partially benefit the following crops of the system by enriching soil. In realization of this sustainability advantage and to promote pulse production, United Nations had declared 2016 as the ''International Year of pulses''. Grain legumes are frequently subjected to both abiotic and biotic stresses resulting in severe yield losses. Global yields of legumes have been stagnant for the past five decades in spite of adopting various conventional and molecular breeding approaches. Furthermore, the increasing costs and negative effects of pesticides and fertilizers for crop production necessitate the use of biological options of crop production and protection. The use of plant growth-promoting (PGP) bacteria for improving soil and plant health has become one of the attractive strategies for developing sustainable agricultural systems due to their eco-friendliness, low production cost and minimizing consumption of non-renewable resources. This review emphasizes on how the PGP actinobacteria and their metabolites can be used effectively in enhancing the yield and controlling the pests and pathogens of grain legumes.

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Section: Pgp Actinobacteria As Stress Relieversmentioning

confidence: 99%

Plant growth-promoting actinobacteria: a new strategy for enhancing sustainable production and protection of grain legumes

2017

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“…LKE15 produced bioactive metabolites and solubilized the phosphate in the culture medium Several studies provided detailed information about the secretion of various bioactive metabolites by PGPRs, which increase plant growth and yield (Alam et al 2001;Yandigeri et al 2012). The identification of bacteria that produce root growthpromoting auxin and shoot growth-stimulating GA has been emerging as a major research subject for the development of sustainable and environmentally friendly agricultural methods.…”

Section: Resultsmentioning

confidence: 99%

“…Several bacterial CFs were successfully used to control plant-pathogen growth and reduce its negative effects on plants (Kavroulakis et al 2010;Tonelli et al 2010). Yandigeri et al (2012) found that the presence of bioactive metabolites in the CF of actinobacteria increased the plant growth and yield of wheat during drought stress. The results of this study reveal that treatment with Bacillus sp.…”

Section: Effect Of Bacillus Sp Lke15 Culture Filtrate On Host Plant mentioning

confidence: 99%

Mechanism of plant growth promotion elicited byBacillussp. LKE15 in oriental melon

Kang

Radhakrishnan

Lee

et al. 2015

Acta Agriculturae Scandinavica, Section B — Soil & Plant Sc

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Development of organic fertilizers using microbial extracts is an emerging method in organic farming. The objective of this study was to identify and characterize the bioactive substances in a plant growth-promoting bacterial culture, intended to enhance the growth of oriental melons (Cucumis melo L.). LKE15 was isolated from oriental melon rhizosphere soil and identified as Bacillus sp. LKE15 through 16S rDNA sequencing of the bacterial genomic DNA and a subsequent phylogenetic analysis. Bacillus sp. LKE15 was found to enhance the shoot length, fresh weight, dry weight, and chlorophyll content of both dwarf rice (gibberellins [GAs]-deficient mutant, waito-C) and normal rice (active GAs biosynthesis, Hwayoungbyeo) cultivars, as compared to their controls. The presence of bioactive metabolites such as GAs (GA 4 , GA 9 , and GA 34 ), indole-3-acetic acid, and high concentrations of phosphate in the bacterial culture filtrate (CF) significantly promote host plant growth. The plant growth-stimulating effect of CF was confirmed by the increased shoot length, root length, and plant fresh weight of oriental melon as compared to the controls. Similarly, Bacillus sp. LKE15 inoculation also enhanced plant growth but at a lower rate than CF. The increased synthesis of chlorophyll and individual amino acids and their derivatives, including taurine, aspartic acid, threonine, serine, glycine, alanine, citrulline, isoleucine, leucine, tyrosine, β-alanine, γ-amino-n-butyric acid, ethanolamine, 1-methylhistidine, and hydroxyproline in CF-treated plants reflected a significant increase in the growth of treated plants, as compared to the control. However, magnesium, potassium, and phosphorus contents were significantly enhanced in plants treated with CF. Results of this study suggest that the availability of bioactive metabolites in the CF of Bacillus sp. LKE15 stimulates plant growth, and that treatment with the CF of Bacillus sp. LKE15 would be a useful tool for the organic farming of crop plants.

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“…-enough information available in the public databases (Zhang et al, 1998;Malviya et al, 2011;Yandigeri et al, 2012), but Streptomycetes isolated from stressed habi tats with plant growth promoting potential have not been studied extensively. Bacteria isolated from differ ent stressed habitats possess stress tolerance capacity alongwith plant growthpromoting traits.…”

Section: Hydrolytic Enzymes and Biochemical Characterizationmentioning

confidence: 99%

“…In our studies all the 8 Streptomycetes isolates were positive IAA and siderophore produc ers. There are many reports which demonstrated the ability of endophytic and rhizospheric soil Streptomycetes to produce indole acetic acid and thus promote plant growth (Khamna et al, 2010;Solans et al, 2011;Yandigeri et al, 2012; Kaur et al, 2013). 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.…”

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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Drought-tolerant endophytic actinobacteria promote growth of wheat (Triticum aestivum) under water stress conditions

Cited by 222 publications

References 38 publications

Plant growth-promoting actinobacteria: a new strategy for enhancing sustainable production and protection of grain legumes

Plant growth-promoting actinobacteria: a new strategy for enhancing sustainable production and protection of grain legumes

Mechanism of plant growth promotion elicited byBacillussp. LKE15 in oriental melon

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

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