Effect of Phosphate Solubilization Microorganisms and Plant Growth Promoting Rhizobacteria on Yield and Yield Components of Corn

2017 ◽  
Vol 18 (3) ◽  
Keyword(s):  
Plant Growth ◽  
Yield Components ◽  
Phosphate Solubilization ◽  
Plant Growth Promoting Rhizobacteria ◽  
Yield And Yield Components ◽  
Plant Growth Promoting ◽  
Growth Promoting

scholarly journals Effect of plant growth promoting rhizobacteria (PGPR) in seed germination and root-shoot development of chickpea (Cicer arietinum L.) under different salinity condition

2016 ◽  
Vol 3 (1) ◽  
pp. 105-113 ◽  
Author(s):  
Mohammad Mosharraf Hossain ◽  
Keshob Chandra Das ◽  
Sabina Yesmin ◽  
Syfullah Shahriar
Keyword(s):  
Seed Germination ◽  
Plant Growth ◽  
Indole Acetic Acid ◽  
Phosphate Solubilization ◽  
Plant Growth Promoting Rhizobacteria ◽  
Matter Production ◽  
Wide Range ◽  
Positive Growth ◽  
Plant Growth Promoting ◽  
Growth Promoting

Plant growth promoting rhizobacteria (PGPR) are beneficial bacteria that colonize plant roots and enhance plant growth by a wide variety of mechanisms. Ten isolates of bacteria designated as SS01, SS02, SS03, SS04, SS05, SS06, SS07, SS08, SS09 and SS10 were successfully isolated and morphologically and biochemically characterized. Subsequently to investigate the effect of PGPR isolates on the growth of chickpea, a pot culture experiment was conducted in 2013 at National Institute Biotechnology, Bangladesh net house. Prior to seeds grown in plastic pots, seeds were treated with PGPR isolates and seedlings were harvested after 21 days of inoculation. All the isolates were gram negative in reaction, catalase positive, produced indole acetic acid (IAA) as well as performed phosphate solubilization, able to degrade cellulose and have the adaptability in wide range of temperature and showed positive growth pattern in medium. Most of isolates resulted in a significant increasing of shoot length, root length and dry matter production of shoot and root of chickpea seedlings. Application of PGPR isolates significantly improves the percentage of seed germination under saline conditions. The present study, therefore suggested that the use of PGPR isolates SS04, SS10 and SS08 as inoculants biofertilizers might be beneficial for chickpea cultivation in saline conditionRes. Agric., Livest. Fish.3(1): 105-113, April 2016

scholarly journals Isolation and characterization of salt-tolerant bacteria with plant growth-promoting activities from saline agricultural fields of Haryana, India

2021 ◽  
Vol 19 (1) ◽  
Author(s):  
Arti Sharma ◽  
Kamal Dev ◽  
Anuradha Sourirajan ◽  
Madhu Choudhary
Keyword(s):  
Salt Tolerance ◽  
Plant Growth ◽  
Phosphate Solubilization ◽  
Saline Soil ◽  
Plant Growth Promoting Rhizobacteria ◽  
Bacterial Isolates ◽  
Salt Tolerant ◽  
Plant Growth Promoting ◽  
Growth Promoting

Abstract Background Soil salinity has been one of the biggest hurdles in achieving better crop yield and quality. Plant growth-promoting rhizobacteria (PGPR) are the symbiotic heterogeneous bacteria that play an important role in the recycling of plant nutrients through phytostimulation and phytoremediation. In this study, bacterial isolates were isolated from salt-polluted soil of Jhajjar and Panipat districts of Haryana, India. The potential salt-tolerant bacteria were screened for their PGPR activities such as phosphate solubilization, hydrogen cyanide (HCN), indole acetic acid (IAA) and ammonia production. The molecular characterization of potent isolates with salt tolerance and PGPR activity was done by 16S rDNA sequencing. Results Eighteen soil samples from saline soils of Haryana state were screened for salt-tolerant bacteria. The bacterial isolates were analyzed for salt tolerance ranging from 2 to 10%. Thirteen isolates were found salt tolerant at varied salt concentrations. Isolates HB6P2 and HB6J2 showed maximum tolerance to salts at 10% followed by HB4A1, HB4N3 and HB8P1. All the salt-tolerant bacterial isolates showed HCN production with maximum production by HB6J2. Phosphate solubilization was demonstrated by three isolates viz., HB4N3, HB6P2 and HB6J2. IAA production was maximum in HB4A1 (15.89) and HB6P2 (14.01) and least in HB4N3 (8.91). Ammonia production was maximum in HB6P2 (12.3) and least in HB8P1 (6.2). Three isolates HB6J2, HB8P1 and HB4N3 with significant salt tolerance, and PGPR ability were identified through sequencing of amplified 16SrRNA gene and were found to be Bacillus paramycoides, Bacillus amyloliquefaciens and Bacillus pumilus, respectively. Conclusions The salt-tolerant plant growth-promoting rhizobacteria (PGPR) isolated from saline soil can be used to overcome the detrimental effects of salt stress on plants, with beneficial effects of physiological functions of plants such as growth and yield, and overcome disease resistance. Therefore, application of microbial inoculants to alleviate stresses and enhance yield in plants could be a low cost and environmental friendly option for the management of saline soil for better crop productivity.

scholarly journals Isolation and screening of Azotobacter Spp. for plant growth promoting properties and its survival under different environmental stress conditions

2020 ◽  
Vol 10 (2) ◽  
pp. 5188-5192
Keyword(s):  
Plant Growth ◽  
Phosphate Solubilization ◽  
Plant Growth Promoting Rhizobacteria ◽  
Soil Condition ◽  
Water Shortage ◽  
Stress Conditions ◽  
Soil Productivity ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Agricultural Yield

Because of detrimental changes in the soil condition, the substitution of chemical fertilizer is essential. Quite a lot of alternatives are available to improve the soil productivity now a day such as biofertilizers. Plant growth promoting rhizobacterias (PGPR) is being used as efficient biofertilizers known to influence plant growth by direct or indirect methods. Seeking competent PGPR strains with diverse activities, a total of six Azotobacter were isolated from Orissa University of Agriculture and Technology (OUAT) rice field of Odisha. All these test isolates were screened on the basis of morphological and biochemical characteristics. The result reveals that all isolates are gram negative small rods in shape; all were positive for catalase and oxidase but negative for starch and gelatine hydrolysis. Isolates were then screened for their plant growth promoting properties such as production of indoleacetic acid (IAA), nitrate reduction, ammonia (NH3), phosphate solubilization and antifungal activity. All isolates show IAA, nitrate and phosphate solubilization positive. One of the major constraints on agricultural yield is drought and this circumstance is likely to be intensified in the future due to water shortage worldwide. A number of mitigation approaches and alterations are involved to survive drought stress. Plant growth-promoting rhizobacteria (PGPR) could play a major role in decreasing different stress conditions in plants. From an overall study of six isolates A4 isolate shows significant PGPR and drought tolerant properties.

scholarly journals Quantitative estimation of complex phosphate - solubilization by immobilized or free Azospirillum Lipoferum (H3) as vital vaccine in Pikovskaya broth (PVK) medium

2019 ◽  
pp. 166-173
Author(s):  
Hafsa. M. E. Mohamed ◽  
Farag M. A. Shaieb ◽  
Hesham M. A. EL-Komy
Keyword(s):  
Plant Growth ◽  
Phosphate Solubilization ◽  
Immobilized Cells ◽  
Quantitative Estimation ◽  
Plant Growth Promoting Rhizobacteria ◽  
Free Cell ◽  
Azospirillum Lipoferum ◽  
Complex Phosphate ◽  
Plant Growth Promoting ◽  
Growth Promoting

Azospirillum species were collected from the rhizosphere and free soil of different plants in Al-Jabal El- Akhdar region. The isolates were identified according to biochemical activities. Isolate (H3) which showed the higher solubilization efficiency (SE) on Pikovskaya medium (PVK) containing insoluble phosphate (inorganic phosphate) Ca3(po4)2 Isolate (H3) was identified as Azospirillum lipoferum (H3), which used as an inoculum as free cell suspension or as alginate formulation. Phosphate solubilization was measured by A.lipoferum (H3) as free or alginate immobilized cells in (PVK) liquid medium and recording the pH of the medium at the same time. The results showed in the phosphorus content by immobilized bacteria in liquid (PVK) broth medium from 2nd day of incubation (2.48 µg/ ml) to 10th day (3.70 µg/ ml) and the free bacteria from 2nd day (8.81 µg/ ml) to 10th day (4.49 µg/ ml). pH of the liquid (PVK) broth medium was recorded from 2nd day to 10th day after incubation which decreased by immobilized A.lipoferum (H3) from 7.00 pH to 4.47 on the 10th day and by the free A.lipoferum (H3) to 6.00, which improved the production of organic acids from sugars which was response of decreasing the pH of the medium. This present study contribute to make agriculture more productive with less harm to the environment and for developing countries where the use of fertilizers is costly, and to encourage of using the biofertilizers ‘plant growth promoting rhizobacteria’ (PGPR) instead of the chemical fertilizers to enhance the plant growth which is the main goal to increase the food production in a healthy way.

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