Grain Yield and Related Physiological Characteristics of Rice Plants (<i>Oryza sativa</i> L.) Inoculated with Free-Living Rhizobacteria

Alam, Samiul Md.; Cui, Zong Jie; Yamagishi, Takao; Ishii, Ryuichi

doi:10.1626/pps.4.126

Cited by 34 publications

(11 citation statements)

References 23 publications

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“…The total chlorophyll content was also significantly higher in strain S10724 inoculated plants and increased by 40 %. Increased chlorophyll content and, subsequently, enhanced photosynthesis, is a known plant response to inoculation with several plant growth promoting bacteria (PGPBs) (Alam et al 2001 ; Rani et al 2012 ). It was confirmed that the increased production of photosynthesis enhanced plant growth and yield (Panwar 1991 ; Singh et al 2012 ).…”

Section: Resultsmentioning

confidence: 99%

Growth promotory potential of the cold adapted diazotroph Pseudomonas migulae S10724 against native green gram (Vigna radiata (L.) Wilczek)

Suyal

Shukla

2014

3 Biotech

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It is being confirmed previously the atmospheric nitrogen fixing ability of the cold adapted Pseudomonas migulae S10724 strain at the fluctuating temperatures. Therefore, net house bioinoculation experiment was performed to determine the effectiveness of inoculation of strain S10724 on the growth enhancement of native green gram (Vigna radiata L. Wilczek). The strain significantly (p < 0.05) stimulated the growth of roots (45.3 %) and shoots (45.6 %) of green gram plants. Furthermore, other growth related parameters viz. fresh and dry weight was also found to be increased significantly. Treated plants typically showed more obvious modifications in their biochemical status also. The total chlorophyll and nitrate reductase activity was increased in S10724 inoculated plant as compared to the control one. Moreover, in vitro seed germination assay revealed that the germination was increased in S10724 strain treated seeds by 22 % at 25 °C while 25 % at 12 °C unlikely to respective controls. The results suggest that P.migulae S10724 strain is a potential plant growth promoting bacterium for legume under fluctuating temperature ranges and therefore, could be used effectively as a low cost bioinoculant in Himalayan agricultural belt successfully.

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Section: Resultsmentioning

confidence: 99%

Growth promotory potential of the cold adapted diazotroph Pseudomonas migulae S10724 against native green gram (Vigna radiata (L.) Wilczek)

Suyal

Shukla

2014

3 Biotech

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“…Finally, rice fields inoculated with Azotobacter spp. have shown increases in both plant dry biomass and grain yield . While the yield increases caused by Azospirillum spp.…”

Section: Bacteria As Naturally Occurring Biostimulatorsmentioning

confidence: 99%

Phytohormonal basis for the plant growth promoting action of naturally occurring biostimulators

Kurepin

Zaman

Pharis

2014

J. Sci. Food Agric.

101

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There is increasing interest in the use of naturally occurring 'biostimulators' for enhancing the growth of agricultural and horticultural crops. Bacteria, fungi and protozoa, as well as marine algae-based seaweed extracts, can produce or contain biostimulators. The activity of biostimulators to promote plant growth is often attributed to their ability to directly or indirectly provide mineral nutrients (mostly N, but also P, S and other macro- and micro-nutrients) to plants. Alternatively, biostimulators are postulated to increase the plant's ability to assimilate these mineral nutrients, often in return for photo-assimilates (as occurs with certain bacteria and fungi associations). Although optimal growth of plants depends on the availability of adequate mineral nutritients, that growth (and also development, including reproduction) is also regulated by plant hormones (phytohormones), including gibberellins, auxins and cytokinins. This review describes and discusses the evidence that the presence or application of biostimulators also increases plant growth directly via phytohormone action and also influences the plant's ability to control its own hormone biosynthesis and homeostasis. Finally, it discusses the need for a better understanding of the role(s) that are played by the naturally occurring biostimulators associated with the plant in the crop field. It is suggested that better understanding will allow for optimal crop yield returns, since disruptions of phytohormone homeostasis in plant organs and tissues can yield either beneficial or sub-optimal outcomes.

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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%

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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Grain Yield and Related Physiological Characteristics of Rice Plants (Oryza sativa L.) Inoculated with Free-Living Rhizobacteria

Cited by 34 publications

References 23 publications

Growth promotory potential of the cold adapted diazotroph Pseudomonas migulae S10724 against native green gram (Vigna radiata (L.) Wilczek)

Growth promotory potential of the cold adapted diazotroph Pseudomonas migulae S10724 against native green gram (Vigna radiata (L.) Wilczek)

Phytohormonal basis for the plant growth promoting action of naturally occurring biostimulators

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

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