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Journal articles on the topic 'Promoting plant growth'

Author: Grafiati

Published: 4 June 2021

Last updated: 10 February 2022

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1

Preston, Gail M. "Plant perceptions of plant growth-promoting Pseudomonas." Philosophical Transactions of the Royal Society of London. Series B: Biological Sciences 359, no. 1446 (June 29, 2004): 907–18. http://dx.doi.org/10.1098/rstb.2003.1384.

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Plant–associated Pseudomonas live as saprophytes and parasites on plant surfaces and inside plant tissues. Many plant–associated Pseudomonas promote plant growth by suppressing pathogenic micro–organisms, synthesizing growth–stimulating plant hormones and promoting increased plant disease resistance. Others inhibit plant growth and cause disease symptoms ranging from rot and necrosis through to developmental dystrophies such as galls. It is not easy to draw a clear distinction between pathogenic and plant growth–promoting Pseudomonas . They colonize the same ecological niches and possess similar mechanisms for plant colonization. Pathogenic, saprophytic and plant growth–promoting strains are often found within the same species, and the incidence and severity of Pseudomonas diseases are affected by environmental factors and host–specific interactions. Plants are faced with the challenge of how to recognize and exclude pathogens that pose a genuine threat, while tolerating more benign organisms. This review examines Pseudomonas from a plant perspective, focusing in particular on the question of how plants perceive and are affected by saprophytic and plant growth–promoting Pseudomonas (PGPP), in contrast to their interactions with plant pathogenic Pseudomonas . A better understanding of the molecular basis of plant–PGPP interactions and of the key differences between pathogens and PGPP will enable researchers to make more informed decisions in designing integrated disease–control strategies and in selecting, modifying and using PGPP for plant growth promotion, bioremediation and biocontrol.

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Glick, Bernard R. "The enhancement of plant growth by free-living bacteria." Canadian Journal of Microbiology 41, no. 2 (February 1, 1995): 109–17. http://dx.doi.org/10.1139/m95-015.

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The ways in which plant growth promoting rhizobacteria facilitate the growth of plants are considered and discussed. Both indirect and direct mechanisms of plant growth promotion are dealt with. The possibility of improving plant growth promoting rhizobacteria by specific genetic manipulation is critically examined.Key words: plant growth promoting rhizobacteria, PGPR, bacterial fertilizer, soil bacteria.

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Hills, P. N., L. M. Kotze, L. E. Steenkamp, N. N. Ludidi, and J. M. Kossmann. "Plant growth promoting substances." South African Journal of Botany 75, no. 2 (April 2009): 405. http://dx.doi.org/10.1016/j.sajb.2009.02.061.

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4

Mandava, N. B. "Plant Growth-Promoting Brassinosteroids." Annual Review of Plant Physiology and Plant Molecular Biology 39, no. 1 (June 1988): 23–52. http://dx.doi.org/10.1146/annurev.pp.39.060188.000323.

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5

Miransari, Mohammad. "Plant Growth Promoting Rhizobacteria." Journal of Plant Nutrition 37, no. 14 (August 30, 2014): 2227–35. http://dx.doi.org/10.1080/01904167.2014.920384.

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6

Lugtenberg, Ben, and Faina Kamilova. "Plant-Growth-Promoting Rhizobacteria." Annual Review of Microbiology 63, no. 1 (October 2009): 541–56. http://dx.doi.org/10.1146/annurev.micro.62.081307.162918.

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7

Singh, Jay Shankar. "Plant Growth Promoting Rhizobacteria." Resonance 18, no. 3 (March 2013): 275–81. http://dx.doi.org/10.1007/s12045-013-0038-y.

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8

Jeyanthi, V., and S. Kanimozhi. "Plant Growth Promoting Rhizobacteria (PGPR) - Prospective and Mechanisms: A Review." Journal of Pure and Applied Microbiology 12, no. 2 (June 30, 2018): 733–49. http://dx.doi.org/10.22207/jpam.12.2.34.

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9

Ross, John J., and James B. Reid. "Evolution of growth-promoting plant hormones." Functional Plant Biology 37, no. 9 (2010): 795. http://dx.doi.org/10.1071/fp10063.

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The plant growth hormones auxin, gibberellins (GAs) and brassinosteroids (BRs) are major determinants of plant growth and development. Recently, key signalling components for these hormones have been identified in vascular plants and, at least for the GAs and BRs, biosynthetic pathways have been clarified. The genome sequencing of a range of species, including a few non-flowering plants, has allowed insight into the evolution of the hormone systems. It appears that the moss Physcomitrella patens can respond to auxin and contains key elements of the auxin signalling pathway, although there is some doubt as to whether it shows a fully developed rapid auxin response. On the other hand, P. patens does not show a GA response, even though it contains genes for components of GA signalling. The GA response system appears to be more advanced in the lycophyte Selaginella moellendorffii than in P. patens. Signalling systems for BRs probably arose after the evolutionary divergence of the mosses and vascular plants, although detailed information is limited. Certainly, the processes affected by the growth hormones (e.g. GAs) can differ in the different plant groups, and there is evidence that with the evolution of the angiosperms, the hormone systems have become more complex at the gene level. The intermediate nature of mosses in terms of overall hormone biology allows us to speculate about the possible relationship between the evolution of plant growth hormones and the evolution of terrestrial vascular plants in general.

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10

Santoyo, Gustavo, Gabriel Moreno-Hagelsieb, Ma del Carmen Orozco-Mosqueda, and Bernard R. Glick. "Plant growth-promoting bacterial endophytes." Microbiological Research 183 (February 2016): 92–99. http://dx.doi.org/10.1016/j.micres.2015.11.008.

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11

Babeanu, Narcisa, Ovidiu Popa, Marina Pamfil, Petruta Cornea, Misu Moscovici, and Adrian Vamanu. "Plant growth-promoting microbial agents." Journal of Biotechnology 131, no. 2 (September 2007): S34. http://dx.doi.org/10.1016/j.jbiotec.2007.07.056.

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12

van Loon, L. C. "Plant responses to plant growth-promoting rhizobacteria." European Journal of Plant Pathology 119, no. 3 (June 5, 2007): 243–54. http://dx.doi.org/10.1007/s10658-007-9165-1.

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13

M, Tariq. "Antagonistic features displayed by Plant Growth Promoting Rhizobacteria (PGPR): A Review." Journal of Plant Science and Phytopathology 1, no. 1 (2017): 038–43. http://dx.doi.org/10.29328/journal.jpsp.1001004.

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14

Stamenov, D., M. Jarak, S. Đurić, D. Milošev, and T. Hajnal-Jafari. " Plant growth promoting rhizobacteria in the production of English ryegrass." Plant, Soil and Environment 58, No. 10 (October 12, 2012): 477–80. http://dx.doi.org/10.17221/132/2012-pse.

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The effect of inoculation with Pseudomonas fluorescens and Bacillus subtilis on the yield of fresh and dry mass of English ryegrass (Lolium perenne L.) as well as on the number of rhizospheric microorganisms was studied. The microorganisms were introduced into the soil before sowing. The control plots were not inoculated. The number of microorganisms was determined after the third mowing. The yield was determined after the first, second and third mowing. In comparison with the control, after the first and second mowing, there was a statistically significant increase in the fresh and dry mass in both inoculated variants whereas after the third mowing, a statistically significant increase in the yield of fresh mass was recorded only in the variant with B. subtilis. The use of B. subtilis had a better effect on the total yield of the fresh and dry mass of English ryegrass. The number of the investigated groups of microorganisms, apart from actinomycetes, increased in the inoculated variants. Inoculation of P. fluorescens affected the increase of total number of bacteria and aminoheterotrophs whereas inoculation of B. subtilis affected the increase of the number of azotobacter and fungi.    

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15

S. Megala, S. Megala. "Phytohormones Production by Plant Growth Promoting Rhizobacterial Isolates In Gloriosa superba.L." Indian Journal of Applied Research 3, no. 7 (October 1, 2011): 1–3. http://dx.doi.org/10.15373/2249555x/july2013/1.

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16

Bandopadhyay, Sandip. "Application of Plant Growth Promoting Bacillus thuringiensis as Biofertilizer on Abelmoschus esculentus Plants under Field Condition." Journal of Pure and Applied Microbiology 14, no. 2 (May 7, 2020): 1287–94. http://dx.doi.org/10.22207/jpam.14.2.24.

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17

Mabood, Fazli, Xiaomin Zhou, and Donald L. Smith. "Microbial signaling and plant growth promotion." Canadian Journal of Plant Science 94, no. 6 (August 2014): 1051–63. http://dx.doi.org/10.4141/cjps2013-148.

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Mabood, F., Zhou, X. and Smith, D. L. 2014. Microbial signaling and plant growth promotion. Can. J. Plant Sci. 94: 1051–1063. The rhizosphere offers a complex microhabitat where root exudates provide a diverse mixture of organic compounds that are used as nutrients or signals by the soil microbial population. On the other hand, these soil microorganisms produce compounds that directly or indirectly assist in plant growth promotion. The widely recognized mechanisms of plant growth promotion are biofertilization, production of phytohormones, suppression of diseases through biocontrol, induction of disease resistance and production of volatile signal compounds. During the past few decades our understanding of the interaction between rhizobacteria and plants has expanded enormously and this has resulted in application of microbial products used as crop inoculants (as biofertilizers), for increased crop biomass and disease suppression. However, this plant–microbe interaction is affected by adverse environmental conditions, and recent work has suggested that inoculants carrying plant-to-bacteria or bacteria-to-plant signals can overcome this and promote plant productivity under stressful environmental conditions. Very recent work has also shown that some plant growth-promoting rhizobacteria secrete novel signaling molecules that also promote plant growth. The use of rhizobacterial signaling in promoting plant growth offers a new window of opportunity, especially when we are looking at plants to provide biofuels and novel bioproducts. Developing technologies that can enhance plant growth and productivity is imperative.

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18

Rudolph, N., N. Labuschagne, and T. A. S. Aveling. "The effect of plant growth promoting rhizobacteria on seed germination and seedling growth of maize." Seed Science and Technology 43, no. 3 (December 15, 2015): 507–18. http://dx.doi.org/10.15258/sst.2015.43.3.04.

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19

Glick, Bernard R. "Plant Growth-Promoting Bacteria: Mechanisms and Applications." Scientifica 2012 (2012): 1–15. http://dx.doi.org/10.6064/2012/963401.

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The worldwide increases in both environmental damage and human population pressure have the unfortunate consequence that global food production may soon become insufficient to feed all of the world's people. It is therefore essential that agricultural productivity be significantly increased within the next few decades. To this end, agricultural practice is moving toward a more sustainable and environmentally friendly approach. This includes both the increasing use of transgenic plants and plant growth-promoting bacteria as a part of mainstream agricultural practice. Here, a number of the mechanisms utilized by plant growth-promoting bacteria are discussed and considered. It is envisioned that in the not too distant future, plant growth-promoting bacteria (PGPB) will begin to replace the use of chemicals in agriculture, horticulture, silviculture, and environmental cleanup strategies. While there may not be one simple strategy that can effectively promote the growth of all plants under all conditions, some of the strategies that are discussed already show great promise.

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20

Grobelak, A., A. Napora, and M. Kacprzak. "Using plant growth-promoting rhizobacteria (PGPR) to improve plant growth." Ecological Engineering 84 (November 2015): 22–28. http://dx.doi.org/10.1016/j.ecoleng.2015.07.019.

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21

Swarupa, Preeti, and Anil Kumar. "Impact of Chlorpyrifos on Plant Growth Promoting Rhizobacteria Isolated from Abelmoschus esculentus." Journal of Pure and Applied Microbiology 12, no. 4 (December 30, 2018): 2149–57. http://dx.doi.org/10.22207/jpam.12.4.53.

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22

backera, Rineesha. "Plant growth promoting actinobacteria from rhizosphere soils of black pepper in Wayanad." Biotechnology and Bioprocessing 2, no. 5 (June 24, 2021): 01–08. http://dx.doi.org/10.31579/2766-2314/031.

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Actinobacteria isolated from the rhizosphere soils of black pepper comprising both flood affected and non-flood affected areas of Wayanad district. Among different soil samples analysed, Puttad (Ptd) recorded significantly superior actinobacterial population on starch casein aga, Kenknight & Munaier’s agar and actinomycetes isolation agar. Actinobacterial colonies could not be detected in any of the flooded soil samples on any medium, even at a dilution of 10-1, except in Meppadi soil, which recorded a low population of 0.3x101cfu g-1 soil. Starch casein agar is best media to isolate actinobacteria from soil samples compared to other two media. The cultural, morphological and biochemical characterization of thirty-five isolates was carried out. Further the isolates were evaluated for their plant growth promoting traits such as IAA production, nitrogen fixation, P, K and Zn solubilization. The isolates Ptd-A and Amb-C were found to be significantly superior to all other isolates, with IAA production of 15.9 g ml-1 and 15.38 g ml-1 respectively. The four isolates viz. Ptd-A, Ptd-E, Ptd-B and Ptr-A recorded significantly superior nitrogen fixation and the phosphate solubilized was significantly higher in Ptd-E, Ptd-D, Ptr-E, Ptd-A and Ptr-A, as compared to other isolates. All isolates were negative to K and Zn solubilization. Based on in vitro evaluations, three isolates were shortlisted (Ptd-A, Ptd-E and Ptr-A) and subjected to in vivo evaluation for growth promotion in black pepper (variety Panniyur 1). Rooted plants of black pepper were raised in sterile potting mixture. Bioinoculants applied at the time of planting and 45 days after planting. The PGPR Mix-1 and Organic Package of Practices Recommendations (2017) were used for comparison with the microbial inoculants along with control. In the in-planta experiment, biometric characters were recorded at monthly intervals, up to five months. The actinobacterial treatment, T1: Ptd-E, T2: Ptd-A and T3: Ptr-A showed significant increase in shoot length, number of leaves and internode length throughout the growth period from planting to five MAP. Significantly higher root growth was observed in treatment T2: Ptd-A, with significantly higher root volume, fresh and root weight. The potential actinobacteria were identified Ptd-A and Ptr-A as Streptomyces sp. and Ptd-A as Actinobacteria bacterium using 16S r RNA gene sequencing.

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23

Shirkot, C. K., and N. Sharma. "GROWTH PROMOTION OF APPLE SEEDLINGS BY PLANT GROWTH PROMOTING RHIZOBACTERIUM (BACILLUS MEGATERIUM)." Acta Horticulturae, no. 696 (November 2005): 157–62. http://dx.doi.org/10.17660/actahortic.2005.696.26.

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24

Adhikari Dhungana, Sabitri, Fumihiko Adachi, Shohei Hayashi, Ramesh Raj Puri, and Kazuhito Itoh. "Plant Growth Promoting Effects of Nepalese Sweet Potato Endophytes." Horticulturae 4, no. 4 (December 6, 2018): 53. http://dx.doi.org/10.3390/horticulturae4040053.

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Endophytic bacteria form a symbiotic relation with plants and generally cause no harmful effects to the host plants. In a previous study, we isolated eight bacterial endophytes from sweet potato plants harvested in Salyan, Nepal. These endophytes showed plant growth-promoting properties as a mixed culture. In this study, we evaluated the ability of these strains to produce indole-3-acetic acid (IAA) and to fix nitrogen. Based on these results, we selected two strains, Klebsiella sp. Sal 1 and Enterobacter sp. Sal 3, and evaluated their ability to promote plant growth. IAA production activity peaked at 15–60 mg NH4NO3/L in plant-free medium. Similarly, acetylene reduction activity peaked at 0–6.25 mg NH4NO3/L. Both strains successfully colonized plants, promoted the growth of tomatoes, and induced phenotypes in plants consistent with IAA exposure. This suggests that these strains promote plant growth by producing IAA inside the plant, where nitrogen levels are expected to be low.

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25

Hafeez, Fauzia Y., Sumera Yasmin, Dini Ariani, Mehboob ur-Rahman, Yusuf Zafar, and Kauser A. Malik. "Plant growth-promoting bacteria as biofertilizer." Agronomy for Sustainable Development 26, no. 2 (April 2006): 143–50. http://dx.doi.org/10.1051/agro:2006007.

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26

Zhao, Ping, Chenyao Lei, Wenxu Xia, Yan Zhuang, Xinguo Zhang, and Zhenji Tian. "Characteristics Study on Promoting Plant Growth Activity of Plant Growth Promoting Rhizobacteria Fertilizers Containing Nano-Attapulgite." Journal of Biobased Materials and Bioenergy 12, no. 4 (August 1, 2018): 392–96. http://dx.doi.org/10.1166/jbmb.2018.1785.

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27

Gunes, Adem, Kenan Karagoz, Metin Turan, Recep Kotan, Ertan Yildirim, Ramazan Cakmakci, and Fikrettin Sahin. "Fertilizer Efficiency of Some Plant Growth Promoting Rhizobacteria for Plant Growth." Research Journal of Soil Biology 7, no. 2 (February 1, 2015): 28–45. http://dx.doi.org/10.3923/rjsb.2015.28.45.

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28

Baron, Noemi Carla, Andressa de Souza Pollo, and Everlon Cid Rigobelo. "Purpureocillium lilacinum and Metarhizium marquandii as plant growth-promoting fungi." PeerJ 8 (May 27, 2020): e9005. http://dx.doi.org/10.7717/peerj.9005.

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Background Especially on commodities crops like soybean, maize, cotton, coffee and others, high yields are reached mainly by the intensive use of pesticides and fertilizers. The biological management of crops is a relatively recent concept, and its application has increased expectations about a more sustainable agriculture. The use of fungi as plant bioinoculants has proven to be a useful alternative in this process, and research is deepening on genera and species with some already known potential. In this context, the present study focused on the analysis of the plant growth promotion potential of Purpureocillium lilacinum, Purpureocillium lavendulum and Metarhizium marquandii aiming its use as bioinoculants in maize, bean and soybean. Methods Purpureocillium spp. and M. marquandii strains were isolated from soil samples. They were screened for their ability to solubilize phosphorus (P) and produce indoleacetic acid (IAA) and the most promising strains were tested at greenhouse in maize, bean and soybean plants. Growth promotion parameters including plant height, dry mass and contents of P and nitrogen (N) in the plants and in the rhizospheric soil were assessed. Results Thirty strains were recovered and characterized as Purpureocillium lilacinum (25), Purpureocillium lavendulum (4) and Metarhizium marquandii (1). From the trial for P solubilization and IAA production, seven strains were selected and inoculated in maize, bean and soybean plants. These strains were able to modify in a different way the evaluated parameters involving plant growth in each crop, and some strains distinctly increased the availability of P and N, for the last, an uncommon occurrence involving these fungi. Moreover, the expected changes identified at the in vitro analysis were not necessarily found in planta. In addition, this study is the first to evaluate the effect of the isolated inoculation of these fungi on the growth promotion of maize, bean and soybean plants.

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Maji, Deepamala, Deepti Barnawal, Aakansha Gupta, Shikha King, A. K. Singh, and A. Kalra. "A natural plant growth promoter calliterpenone from a plant Callicarpa macrophylla Vahl improves the plant growth promoting effects of plant growth promoting rhizobacteria (PGPRs)." World Journal of Microbiology and Biotechnology 29, no. 5 (December 28, 2012): 833–39. http://dx.doi.org/10.1007/s11274-012-1238-4.

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30

Kloepper, J. W., A. Gutiérrez-Estrada, and J. A. McInroy. "Photoperiod regulates elicitation of growth promotion but not induced resistance by plant growth-promoting rhizobacteria." Canadian Journal of Microbiology 53, no. 2 (February 2007): 159–67. http://dx.doi.org/10.1139/w06-114.

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For several years, we have noticed that plant growth-promoting rhizobacteria (PGPR), which consistently promote plant growth in greenhouse tests during spring, summer, and fall, fail to elicit plant growth promotion during the midwinter under ambient light conditions. This report tests the hypothesis that photoperiod regulates elicitation of growth promotion and induced systemic resistance (ISR) by PGPR. A commercially available formulation of PGPR strains Bacillus subtilis GB03 and Bacillus amyloliquefaciens IN937a (BioYield®) was used to grow tomato and pepper transplants under short-day (8 h of light) (SD) and long-day (12 h of light) (LD) conditions. Results of many experiments indicated that under LD conditions, BioYield consistently elicited significant increases in root and shoot mass as well as in several parameters of root architecture. However, under SD conditions, such increases were not elicited. Differential root colonization of plants grown under LD and SD conditions and changes in leachate quality partially account for these results. BioYield elicited ISR in tomato and pepper under both LD and SD conditions, indicating that although growth promotion was not elicited under SD conditions, induced resistance was. Overall, the results indicate that PGPR-mediated growth promotion is regulated by photoperiod, while ISR is not.

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Noel, T. C., C. Sheng, C. K. Yost, R. P. Pharis, and M. F. Hynes. "Rhizobium leguminosarum as a plant growth-promoting rhizobacterium: direct growth promotion of canola and lettuce." Canadian Journal of Microbiology 42, no. 3 (March 1, 1996): 279–83. http://dx.doi.org/10.1139/m96-040.

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Early seedling root growth of the nonlegumes canola (Brassica campestris cv. Tobin, Brassica napus cv. Westar) and lettuce (Lactuca saliva cv. Grand Rapids) was significantly promoted by inoculation of seeds with certain strains of Rhizobium leguminosarum, including nitrogen- and nonnitrogen-fixing derivatives under gnotobiotic conditions. The growfh-promotive effect appears to be direct, with possible involvement of the plant growth regulators indole-3-acetic acid and cytokinin. Auxotrophic Rhizobium mutants requiring tryptophan or adenosine (precursors for indole-3-acetic acid and cytokinin synthesis, respectively) did not promote growth to the extent of the parent strain. The findings of this study demonstrate a new facet of the Rhizobium–plant relationship and that Rhizobium leguminosarum can be considered a plant growth-promoting rhizobacterium (PGPR).Key words: Rhizobium, plant growth-promoting rhizobacteria, PGPR, indole-3-acetic acid, cytokinin, roots, auxotrophic mutants.

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Wani, Parvaze Ahmad, and Mohammad Saghir Khan. "Nickel Detoxification and Plant Growth Promotion by Multi Metal Resistant Plant Growth Promoting Rhizobium Species RL9." Bulletin of Environmental Contamination and Toxicology 91, no. 1 (April 23, 2013): 117–24. http://dx.doi.org/10.1007/s00128-013-1002-y.

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Zúñiga, Ana, María Josefina Poupin, Raúl Donoso, Thomas Ledger, Nicolás Guiliani, Rodrigo A. Gutiérrez, and Bernardo González. "Quorum Sensing and Indole-3-Acetic Acid Degradation Play a Role in Colonization and Plant Growth Promotion of Arabidopsis thaliana by Burkholderia phytofirmans PsJN." Molecular Plant-Microbe Interactions® 26, no. 5 (May 2013): 546–53. http://dx.doi.org/10.1094/mpmi-10-12-0241-r.

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Although not fully understood, molecular communication in the rhizosphere plays an important role regulating traits involved in plant–bacteria association. Burkholderia phytofirmans PsJN is a well-known plant-growth-promoting bacterium, which establishes rhizospheric and endophytic colonization in different plants. A competent colonization is essential for plant-growth-promoting effects produced by bacteria. Using appropriate mutant strains of B. phytofirmans, we obtained evidence for the importance of N-acyl homoserine lactone-mediated (quorum sensing) cell-to-cell communication in efficient colonization of Arabidopsis thaliana plants and the establishment of a beneficial interaction. We also observed that bacterial degradation of the auxin indole-3-acetic acid (IAA) plays a key role in plant-growth-promoting traits and is necessary for efficient rhizosphere colonization. Wildtype B. phytofirmans but not the iacC mutant in IAA mineralization is able to restore promotion effects in roots of A. thaliana in the presence of exogenously added IAA, indicating the importance of this trait for promoting primary root length. Using a transgenic A. thaliana line with suppressed auxin signaling (miR393) and analyzing the expression of auxin receptors in wild-type inoculated plants, we provide evidence that auxin signaling in plants is necessary for the growth promotion effects produced by B. phytofirmans. The interplay between ethylene and auxin signaling was also confirmed by the response of the plant to a 1-aminocyclopropane-1-carboxylate deaminase bacterial mutant strain.

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Kong, Ping, and Chuanxue Hong. "Endophytic Burkholderia sp. SSG as a potential biofertilizer promoting boxwood growth." PeerJ 8 (July 16, 2020): e9547. http://dx.doi.org/10.7717/peerj.9547.

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Background Burkholderia sp. SSG is a bacterial endophyte isolated from boxwood leaves showing a resistant response to infection by the boxwood blight pathogen Calonectria pseudonaviculata. SSG acted as a protective and curative biocontrol agent for boxwood blight and as a bio-sanitizer of disease inoculum in the field. Many gene clusters involved in antibiotic production and plant growth promotion (PGP) were found in the genome, giving this endophyte great application potential as a treatment for plant protection. However, the PGP features have not been documented. This study investigated the plant growth promotion activity of SSG in boxwood. Methods To determine whether SSG is a plant growth promoting bacterium, four PGP traits, auxin and siderophore production, nitrogen fixation and phosphate solubilization, were examined in the laboratory with colorimetric or agar plate assays. The plant growth promoting activity of SSG was tested on three boxwood varieties characterized by slow, intermediate and fast growth rates, namely Justin Brouwers, Buddy and Winter Gem, respectively. These plants were drenched with an SSG cell suspension or water and washed plant weight was compared before and after treatment to determine growth changes after 10 months. Results The SSG culture was sustainable on nitrogen free media, suggesting that SSG may fix atmospheric nitrogen. It was also a strong phosphate solubilizer and a potent siderophore and indole-3-acetic acid (IAA) producer. Significant growth promotion was observed on boxwood cultivars Justin Brouwers, Buddy and Winter Gem 10 months after plant roots were drenched with SSG cells. The growth rate of treated plants was 76.1, 58.3, and 37.3% higher than that of the control, respectively. The degree of growth promotion was significantly different among plant varieties, notably more pronounced with the slow and intermediate growers. This study demonstrates that the SSG bacterium has multiple PGP traits and is a prospective plant biofertilizer.

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Ghori, Tameezuddin Khan, Anusuya D. Anusuya. D, and Geetha M. Geetha.M. "Growth of Nursery Grown Micro Propagated Bamboo (Bambusa Tulda .L) Inoculated with Arbuscular Mycorrhizal Fungus and Plant Growth Promoting Rhizobacteria (Pgpr)." International Journal of Scientific Research 3, no. 6 (June 1, 2012): 53–54. http://dx.doi.org/10.15373/22778179/june2014/21.

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Răut, Iuliana, Mariana Călin, Luiza Capră, Ana-Maria Gurban, Mihaela Doni, Nicoleta Radu, and Luiza Jecu. "Cladosporium sp. Isolate as Fungal Plant Growth Promoting Agent." Agronomy 11, no. 2 (February 23, 2021): 392. http://dx.doi.org/10.3390/agronomy11020392.

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Cladosporium species are active in protecting plants against different biotic and abiotic stresses. Since these species produced a wide range of secondary metabolites responsible for the adaptation to new habitats, plant health and performance, they are of great interest, especially for biostimulants in agriculture. Cladosporium sp. produces protein hydrolysates (PHs), a class of biostimulants, by cultivation on medium with keratin wastes (feathers) as carbon and energy sources. The aim of this study was to select a Cladosporium isolate with potential to be used as plant growth promoting agent. The characteristics of Cladosporium isolates as plants biostimulants were evaluated through several tests, such as: antagonism versus plants pathogens, effect on plant growth of secreted volatiles produced by isolates, secretion of hydrolytic enzymes, production of 3-indole acetic acid, zinc and phosphorous solubilization, capacity to promote tomato seedlings growth (pot experiments). Cladosporium isolate T2 presented positive results to all tests. Encouraging results were obtained treating tomato seedlings with PHs from isolate Cladosporium T2 cultured on medium supplemented with 1% (w/w) chicken feathers, for which growth parameters, such as stem weight, stem height, and root weight were significantly higher by 65%, 32%, and 55%, respectively, compared to those treated with water.

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Bajracharya, Anup Muni. "Plant growth promoting rhizobacteria (PGPR): Biofertiliser and Biocontrol agent-Review article." Journal of Balkumari College 8 (December 31, 2019): 42–45. http://dx.doi.org/10.3126/jbkc.v8i0.29304.

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Good health starts with good food. Humans expect agriculture to supply good food with sufficient nutrients, economically and culturally valued foods, fibers and other products. But the excessive application of synthetic pesticides has exerted an adverse effect on bio-flora, fauna and natural enemies. Even a largest part of yield has been lost due to various stresses, like biotic and abiotic stresses to the plant. On this account, plant growth promoting rhizobacteria (PGPR), an eco-friendly biopesticides is boon for the biocontrol of different plant pathogens. Moreover, PGPR strains can enhance the plant growth through the production of various plant growth promoting substances. These are generally a group of microorganism that is found either in the plane of the rhizosphere or above roots impacting some positive benefits to plants. PGPR are associated with plant roots and augment plant productivity and immunity; however, recent work by several groups shows that PGPR also elicit so-called 'induced systemic tolerance' to salt and drought. PGPR might also increase nutrient uptake from soils, thus reducing the need for fertilizers and preventing the accumulation of nitrates and phosphates in agricultural soils. Scientific researches involve multidisciplinary approaches to understand adaptation of PGPR, effects on plant physiology and growth, induced systemic resistance, biocontrol of plant pathogens, bio fertilization, and potential green alternative for plant productivity, viability of co inoculating, plant microorganism interactions, and mechanisms of root colonization.

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Shishido, Masahiro, and Christopher P. Chanway. "Spruce growth response specificity after treatment with plant growth-promoting Pseudomonads." Canadian Journal of Botany 77, no. 1 (June 1, 1999): 22–31. http://dx.doi.org/10.1139/b98-197.

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Naturally regenerating hybrid spruce seedlings (Picea glauca (Moench) Voss beta Picea engelmannii Parry) were collected from sites near Mackenzie, Salmon Arm, and Williams Lake, British Columbia, Canada. Bacteria were isolated from roots and screened in greenhouse trials for their ability to enhance spruce growth. Three strains belonging to the genus Pseudomonas were selected for study based on their disparate geographic origins and their capacity to consistently stimulate spruce seedling growth in screening trials. Factorial experiments were performed in the greenhouse to evaluate the effectiveness of these Pseudomonas strains with different spruce ecotypes. Factors tested were spruce seed sources, Pseudomonas isolates, and forest floor soils originating from different sites. Three levels of each factor were studied: one spruce seedlot, one Pseudomonas isolate, and one forest floor type each originated from a site at Mackenzie, Salmon Arm, and Williams Lake, British Columbia. Fourteen weeks after treatments were established, spruce biomass accumulation was greatest when spruce ecotypes were inoculated with bacteria originating from the same geographical area as spruce seed. However, Pseudomonas strains originating from sites other than the seed collection area also stimulated seedling growth significantly, rendering the difference in growth promotion between bacterial treatments small and insignificant. In addition, spruce growth promotion was not enhanced when seed was treated with combinations of Pseudomonas strains and forest floor soils originating from the same forest ecosystem. We conclude that specificity between spruce ecotypes and plant growth-promoting rhizobacteria strains can be detected under carefully controlled conditions, thereby supporting the hypothesis that growth-promoting bacteria may adapt to their plant hosts. However, the growth advantage accruing to seedlings treated with bacteria originating from the same ecosystem is small and suggests that it is not necessary to match Pseudomonas strains with spruce ecotypes and soil types for effective seedling growth promotion.Key words: Pseudomonas, spruce, specificity, growth promotion.

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Shilev, Stefan. "Plant-Growth-Promoting Bacteria Mitigating Soil Salinity Stress in Plants." Applied Sciences 10, no. 20 (October 19, 2020): 7326. http://dx.doi.org/10.3390/app10207326.

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Soil deterioration has led to problems with the nutrition of the world’s population. As one of the most serious stressors, soil salinization has a negative effect on the quantity and quality of agricultural production, drawing attention to the need for environmentally friendly technologies to overcome the adverse effects. The use of plant-growth-promoting bacteria (PGPB) can be a key factor in reducing salinity stress in plants as they are already introduced in practice. Plants having halotolerant PGPB in their root surroundings improve in diverse morphological, physiological, and biochemical aspects due to their multiple plant-growth-promoting traits. These beneficial effects are related to the excretion of bacterial phytohormones and modulation of their expression, improvement of the availability of soil nutrients, and the release of organic compounds that modify plant rhizosphere and function as signaling molecules, thus contributing to the plant’s salinity tolerance. This review aims to elucidate mechanisms by which PGPB are able to increase plant tolerance under soil salinity.

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Goryluk-Salmonowicz, Agata, Aleksandra Orzeszko-Rywka, Monika Piórek, Hanna Rekosz-Burlaga, Adrianna Otłowska, Dariusz Gozdowski, and Mieczysław Błaszczyk. "PLANT GROWTH PROMOTING BACTERIAL ENDOPHYTES ISOLATED FROM POLISH HERBAL PLANTS." Acta Scientiarum Polonorum Hortorum Cultus 17, no. 5 (October 23, 2018): 101–10. http://dx.doi.org/10.24326/asphc.2018.5.9.

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Ramanuj, Krupali, and Harsha Shelat. "Plant Growth Promoting Potential of Bacterial Endophytes from Medicinal Plants." Advances in Research 13, no. 6 (February 26, 2018): 1–15. http://dx.doi.org/10.9734/air/2018/40014.

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PAULA, GABRIEL FERREIRA DE, GILBERTO BUENO DEMÉTRIO, and LEOPOLDO SUSSUMU MATSUMOTO. "BIOTECHNOLOGICAL POTENTIAL OF SOYBEAN PLANT GROWTH-PROMOTING RHIZOBACTERIA." Revista Caatinga 34, no. 2 (June 2021): 328–38. http://dx.doi.org/10.1590/1983-21252021v34n209rc.

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ABSTRACT Technologies that use rhizobacteria to promote plant growth are increasing in agriculture, results have shown improvements in soil quality, increases in productivity, and decreases in the use of synthetic inputs, The objective of work was to characterize bacterial isolates regarding their biological activity and growth promotion of soybean plants grown in a controlled environment. Fifteen bacteria were isolated from soils with continuous use of biological fertilizer. They were evaluated for enzymes production (amylase and protease), nitrogen fixation, antagonistic activity to phytopathogenic fungi, and indoleacetic acid (IAA) production, Soybean seeds were inoculated with bacterial isolates in a greenhouse and evaluated for plant development and soil chemical attributes. The results showed that 8 of the 15 isolates presented production of amylase, protease, or both and 4 isolates presented nitrogen-fixing capacity. The percentage of isolates with high or moderate inhibitory action against the fungi Sclerotinia sclerotiorum, Macrophomina phaseolina, and Fusarium solani were 73.3%, 66.6%, and 73.3%, respectively. The IAA production varied from 8.56 to 31.33 µg mL-1 (5 isolates had low, 6 had moderate, and 4 had high production). The soybean development was significantly higher in 80% of the treatments with inoculation with bacterial isolates. Five bacterial isolates effectively present all characteristics for use as inoculant (biofertilizer) to promote the development of soybean plants.

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Kotoky, Rhitu, Sudipta Nath, Dinesh Kumar Maheshwari, and Piyush Pandey. "Cadmium resistant plant growth promoting rhizobacteria Serratia marcescens S2I7 associated with the growth promotion of rice plant." Environmental Sustainability 2, no. 2 (May 23, 2019): 135–44. http://dx.doi.org/10.1007/s42398-019-00055-3.

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F, Sultana, Islam M.R, Sabbir M.A, and Hossain M.M. "Plant Growth Promotion and Suppression of Damping Off in Tomato by Plant Growth Promoting Rhizobacterium Bacillus amyloliquifaciens." Canadian Journal of Agriculture and Crops 5, no. 1 (2020): 59–68. http://dx.doi.org/10.20448/803.5.1.59.68.

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Shivanna, Manchanahally B., Manchanahally S. Meera, and Mitsuro Hyakumachi. "Sterile fungi from zoysiagrass rhizosphere as plant growth promoters in spring wheat." Canadian Journal of Microbiology 40, no. 8 (August 1, 1994): 637–44. http://dx.doi.org/10.1139/m94-101.

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Eleven out of 18 sterile fungal isolates and an isolate each of Penicillium sp. and Trichoderma sp. from the zoysiagrass rhizosphere were effective in enhancing the growth of two wheat varieties in greenhouse conditions. They enhanced the top length and top dry biomass of plants significantly and induced the plants to produce long earheads and more seeds. Notable among isolates were GS6-1, GS6-2, GS7-3, GS7-4, GS8-6, GS10-1, GS10-2, and GU23-3, which enhanced the growth by several times, resulting in a conspicuous growth promotion effect that differed depending on the variety. Penicillium and Trichoderma species were less effective than sterile isolates in enhancing growth. Seven of the 11 effective sterile isolates from the zoysiagrass rhizosphere (as determined under greenhouse conditions) and a wheat rhizosphere isolate (K-17) were further tested under field conditions. Most of the isolates except K-17 enhanced the growth of one variety, whereas a few isolates enhanced the growth of the other variety. However, at least four isolates each increased yields of both varieties. Isolate GS6-1, which was very effective under greenhouse conditions in promoting overall growth, was less effective under field conditions; however, the yield components were not affected. The efficiency of the plant growth promoting isolates depended upon the wheat variety and soil nutrient conditions in addition to their inherent growth promotion abilities.Key words: plant growth promoting fungi (PGPF), sterile fungi, wheat growth promotion, yield components.

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Santoyo, Gustavo, Carlos Alberto Urtis-Flores, Pedro Damián Loeza-Lara, Ma del Carmen Orozco-Mosqueda, and Bernard R. Glick. "Rhizosphere Colonization Determinants by Plant Growth-Promoting Rhizobacteria (PGPR)." Biology 10, no. 6 (May 27, 2021): 475. http://dx.doi.org/10.3390/biology10060475.

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The application of plant growth-promoting rhizobacteria (PGPR) in the field has been hampered by a number of gaps in the knowledge of the mechanisms that improve plant growth, health, and production. These gaps include (i) the ability of PGPR to colonize the rhizosphere of plants and (ii) the ability of bacterial strains to thrive under different environmental conditions. In this review, different strategies of PGPR to colonize the rhizosphere of host plants are summarized and the advantages of having highly competitive strains are discussed. Some mechanisms exhibited by PGPR to colonize the rhizosphere include recognition of chemical signals and nutrients from root exudates, antioxidant activities, biofilm production, bacterial motility, as well as efficient evasion and suppression of the plant immune system. Moreover, many PGPR contain secretion systems and produce antimicrobial compounds, such as antibiotics, volatile organic compounds, and lytic enzymes that enable them to restrict the growth of potentially phytopathogenic microorganisms. Finally, the ability of PGPR to compete and successfully colonize the rhizosphere should be considered in the development and application of bioinoculants.

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Sharma, A., D. Shankhdhar, and Shankhdhar SC. "Enhancing grain iron content of rice by the application of plant growth promoting rhizobacteria." Plant, Soil and Environment 59, No. 2 (January 15, 2013): 89–94. http://dx.doi.org/10.17221/683/2012-pse.

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Rice is inherently low in micronutrients, especially iron, which leads to severe malnutrition problems in rice-consuming populations. Different plant growth promoting rhizobacterial strains (PGPRs) (viz. Pseudomonas putida, Pseudomonas fluorescens, and Azospirillum lipoferum from a microbial collection and B 15, B 17, B 19, BN 17 and BN 30 isolated from the rhizospheric soils) were applied to field grown rice plants with an aim to increase the iron content of grains. 16S rRNA gene sequence showed that isolates belong to Enterobacteria species. Different parameters related to the increase in iron content of plants show an enhancement upon treatment of rice plants with PGPRs. Treatments with P. putida, B 17 and B 19 almost doubled the grain iron content. Besides this, the translocation efficiency of the iron from roots to shoots to grains was also enhanced upon treatment with PGPRs. It is therefore concluded that application of PGPR strains is an important strategy to combat the problem of iron deficiency in rice and consecutively in human masses.

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Dorjey, Stanzin, Disket Dolkar, and Richa Sharma. "Plant Growth Promoting Rhizobacteria Pseudomonas: A Review." International Journal of Current Microbiology and Applied Sciences 6, no. 7 (July 10, 2017): 1335–44. http://dx.doi.org/10.20546/ijcmas.2017.607.160.

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Kloepper, J. W. "Plant Growth-Promoting Rhizobacteria on Canola (Rapeseed)." Plant Disease 72, no. 1 (1988): 42. http://dx.doi.org/10.1094/pd-72-0042.

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Abhilash, P. C., Rama Kant Dubey, Vishal Tripathi, Vijai K. Gupta, and Harikesh B. Singh. "Plant Growth-Promoting Microorganisms for Environmental Sustainability." Trends in Biotechnology 34, no. 11 (November 2016): 847–50. http://dx.doi.org/10.1016/j.tibtech.2016.05.005.

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