Efficacy of indigenous plant growth promoting rhizobacteria on capsicum yield and soil health

Plant growth-promoting rhizobacteria with multiple growth-promoting traits play a significant role in soil to improve soil health, crop growth and yield. Recent research studies have focused on the integration of organic amendments with plant growth-promoting rhizobacteria (PGPR) to enhance soil fertility and reduce the hazardous effects of chemical fertilizers. This study aims to evaluate the integrated application of biochar, compost, fruit and vegetable waste, and Bacillus subtilis (SMBL 1) to soil in sole application and in combined form. The study comprises eight treatments—four treatments without inoculation and four treatments with SMBL 1 inoculation in a completely randomized design (CRD), under factorial settings with four replications. The results indicate that the integrated treatments significantly improved okra growth and yield compared with sole applications. The integration of SMBL 1 with biochar showed significant improvements in plant height, root length, leaf chlorophyll a and b, leaf relative water content, fruit weight, diameter and length by 29, 29, 50, 53.3, 4.3, 44.7 and 40.4%, respectively, compared with control. Similarly, fruit N, P and K contents were improved by 33, 52.7 and 25.6% and Fe and Zn in shoot were 37.1 and 35.6%, respectively, compared with control. The results of this study reveal that the integration of SMBL 1 with organic amendments is an effective approach to the sustainable production of okra.

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PLANT GROWTH PROMOTING ACTIVITIES OF RHIZOBACTERIA ISOLATED FROM RHIZOSPHERIC SOILS OF RURAL BANGALORE, INDIA

PLANT ARCHIVES ◽

10.51470/plantarchives.2021.v21.no2.007 ◽

2021 ◽

Vol 21 (2) ◽

Author(s):

Sadhana Venkatesh ◽

Sandeep Suryan ◽

Nagananda Govinahalli Shivashankara ◽

Swetha Seshagiri

Keyword(s):

Plant Growth ◽

Agricultural Soils ◽

Soil Health ◽

Plant Growth Promoting Rhizobacteria ◽

Plant Life ◽

Drought And Salt Tolerance ◽

Plant Growth Promoting Activities ◽

Plant Growth Promoting ◽

Acinetobacter Pittii ◽

Growth Promoting

Soil is a dynamic ecosystem which provides support to plant life. Microorganisms inhabiting the rhizosphere region of soil play a key role in agriculture by promoting the exchange of plant nutrients and reducing the application of chemical fertilizers to a large extent. Engineering of rhizospheric region through exploitation of specific microorganisms leads to higher microbial diversity in the soil which in turn plays a significant role in maintaining the soil health. The present work envisages the isolation, screening and biochemical profiling of potent plant growth promoting rhizobacteria from various rhizospheric soils in and around Bangalore. Sixty isolates from rhizospheric region of fourteen different agricultural soils were screened for plant growth promoting traits such as phosphate solubilization, siderophore production, Ammonia, HCN & Phytohormone production. Twelve isolates that exhibited plant growth promotional traits were further subjected to screening for drought and salt tolerance. Among the twelve isolates, four potential isolates namely Serratia marcescens, Pseudomonas aeruginosa and Acinetobacter pittii were identified based on biochemical methods and 16SrRNA sequencing.

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Bacterial Diversity and Community Structure in Typical Plant Rhizosphere

Diversity ◽

10.3390/d11100179 ◽

2019 ◽

Vol 11 (10) ◽

pp. 179 ◽

Cited By ~ 6

Author(s):

Alawiye ◽

Babalola

Keyword(s):

Plant Growth ◽

Soil Health ◽

Plant Growth Promoting Rhizobacteria ◽

Vital Role ◽

Success Story ◽

Bacillus Spp ◽

Plant Growth Promoting ◽

Microbe Interactions ◽

Growth Promoting

Bacteria play a vital role in the quality of soil, health, and the production of plants. This has led to several studies in understanding the diversity and structure in the plant rhizosphere. Over the years, there have been overwhelming advances in molecular biology which have led to the development of omics techniques which utilize RNA, DNA, or proteins as biomolecules; these have been gainfully used in plant–microbe interactions. The bacterial community found in the rhizosphere is known for its colonization around the roots due to availability of nutrients, and composition, and it affects the plant growth directly or indirectly. Metabolic fingerprinting enables a snapshot of the metabolic composition at a given time. We review metabolites with ample information on their benefit to plants and which are found in rhizobacteria such as Pseudomonas spp. and Bacillus spp. Exploring plant-growth-promoting rhizobacteria using omics techniques can be a true success story for agricultural sustainability.

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Exploitation of agro-climatic environment for selection of 1-aminocyclopropane-1-carboxylic acid (ACC) deaminase producing salt tolerant indigenous plant growth promoting rhizobacteria

Microbiological Research ◽

10.1016/j.micres.2017.08.007 ◽

2017 ◽

Vol 205 ◽

pp. 25-34 ◽

Cited By ~ 12

Author(s):

Sankalp Misra ◽

Vijay Kant Dixit ◽

Mohammad Haneef Khan ◽

Shashank Kumar Mishra ◽

Gyanendra Dviwedi ◽

...

Keyword(s):

Carboxylic Acid ◽

Plant Growth ◽

Acc Deaminase ◽

Plant Growth Promoting Rhizobacteria ◽

Salt Tolerant ◽

Climatic Environment ◽

Indigenous Plant ◽

Plant Growth Promoting ◽

Growth Promoting ◽

Selection Of

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Effect of salt-tolerant plant growth-promoting rhizobacteria on wheat plants and soil health in a saline environment

Plant Biology ◽

10.1111/plb.12173 ◽

2014 ◽

Vol 17 (1) ◽

pp. 288-293 ◽

Cited By ~ 79

Author(s):

S. K. Upadhyay ◽

D. P. Singh

Keyword(s):

Plant Growth ◽

Soil Health ◽

Plant Growth Promoting Rhizobacteria ◽

Salt Tolerant ◽

Saline Environment ◽

Tolerant Plant ◽

Plant Growth Promoting ◽

Growth Promoting

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Plant Growth Promoting Rhizobacterial Biofertilizers for Sustainable Crop Production: The Past, Present, and Future

10.20944/preprints202009.0650.v1 ◽

2020 ◽

Author(s):

Becky N. Aloo ◽

Billy A. Makumba ◽

Ernest R. Mbega

Keyword(s):

Plant Growth ◽

Crop Production ◽

Crop Yields ◽

Agricultural Practices ◽

Plant Growth Promoting Rhizobacteria ◽

Full Potential ◽

Sustainable Crop Production ◽

Indigenous Plant ◽

Plant Growth Promoting ◽

Growth Promoting

The world’s population is increasing and so are agricultural activities to match the growing demand for food. Conventional agricultural practices generally employ artificial fertilizers to increase crop yields, but these have multiple environmental and human health effects. For decades, environmentalists and sustainability researchers have focused on alternative crop fertilization mechanisms to address these challenges, and biofertilizers have constantly been researched, recommended, and even successfully-adopted for several crops. Biofertilizers are microbial formulations made of indigenous plant growth-promoting rhizobacteria (PGPR) which can naturally improve plant growth either directly or indirectly, through the production of phytohormones, solubilization of soil nutrients, and production of iron-binding metabolites; siderophores. Biofertilizers, therefore, hold immense potential as tools for sustainable crop production especially in the wake of climate change and global warming. Despite the mounting interest in this technology, their full potential has not yet been realized. This review updates our understanding of the PGPR biofertilizers and sustainable crop production. It evaluates the history of these microbial products, assesses their present state of utilization, and also critically propounds on their future prospects for sustainable crop production. Such information is desirable to fully evaluate their potential and can ultimately pave the way for their increased adoption for crop production.

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