scholarly journals A review on weeds as source of novel plant growth promoting microbes for crop improvement

2014 ◽  
Vol 6 (2) ◽  
pp. 880-886 ◽  
Author(s):  
C. Sarathambal ◽  
K. Ilamurugu ◽  
L. Srimathi Priya ◽  
K. K. Barman
Keyword(s):  
Plant Growth ◽  
Agricultural Research ◽  
Crop Improvement ◽  
Plant Growth Promoting Rhizobacteria ◽  
Grass Species ◽  
Soil Biodiversity ◽  
Symbiotic Relationships ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Chemical Inputs

In the context of increasing international concern for food security and environmental quality, the use of bioinoculants like diazotrophs and plant growth-promoting rhizobacteria (PGPR) for reducing chemical inputs in agriculture is a potentially important issue. The improvement in agricultural sustainability requires optimal use and management of soil fertility and soil physical properties, where both rely on soil biological processes and soil biodiversity. Biological nitrogen fixation by plant-associated bacteria is eco-friendly and has been effectively exploited for crop plants including legumes. Although associations of rhizobacteria with non-leguminous plants such as grasses have been known for decades, they have been poorly - studied. Weedy grass species normally thrive in adverse conditions and act as potential habitats for the diverse groups of elite bacteria with multiple beneficial characters remains unexplored. A more complete understanding of the diversity and functioning of rhizobacterial microorganisms, especially those that have symbiotic relationships with grass species is of great value for agricultural research and application.

scholarly journals Impact of Plant Growth Promoting Rhizobacteria in Sustainable Agriculture: An Important Natural Resource for Crop Improvement

2019 ◽  
Vol 5 (03) ◽  
pp. 210-214
Author(s):  
Debnirmalya Gangopadhyay ◽  
Ashmita Ghosh
Keyword(s):  
Plant Growth ◽  
Sustainable Agriculture ◽  
Crop Yields ◽  
Growth Promotion ◽  
Crop Improvement ◽  
Plant Growth Promoting Rhizobacteria ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Increasing Demand ◽  
Environmentally Sound

It is usually admitted that the chemical fertilizers and pesticides used in modern agriculture create a real environmental and public health problems. The increasing demand for production with a significant reduction of synthetic fertilizers and pesticides use is a big challenge nowadays. The use of plant growth promoting rhizobacteria or PGPR has been proven to be an environmentally sound way of increasing crop yields by facilitating plant growth through either a direct or indirect mechanism. They play an important role to increase in soil fertility, plant growth promotion and suppression of phytopathogens for development of ecofriendly sustainable agriculture. In view of the latest advances in PGPR biotechnology, this paper proposes to do the review on PGPR in rhizosphere and describes the different mechanisms used by PGPR to promote the plants growth and health. In prospect to a healthy and sustainable agriculture, the PGPR approach revealed as one of the best ecofriendly alternatives.

scholarly journals BIO-CONTROL ACTIVITY OF PLANT GROWTH PROMOTING RHIZOBACTERIA ON SCLEROTIUM ROLFSII

2021 ◽  
Vol 21 (no 1) ◽  
Author(s):  
Z. Mary Swaroopa ◽  
R. Jaya Madhuri
Keyword(s):  
Plant Growth ◽  
Agricultural Development ◽  
Crop Improvement ◽  
Sclerotium Rolfsii ◽  
Plant Growth Promoting Rhizobacteria ◽  
Crop Productivity ◽  
Chemical Components ◽  
Control Activity ◽  
Plant Growth Promoting ◽  
Growth Promoting

Crop productivity and crop improvement are colloidal components as the demand of the increasing population, worldwide for the provision of food from crops require dedicated agricultural strategies that tend to lean on natural, available and, beneficial, easily reproducible means of products. In general, the soil components rich in organic matter that can avail rich microbial community initiates agricultural productivity in abundance and in the way to deduce it. But, commercially available chemical pesticides, pollution in the environment, biotic and abiotic constituents are found to be the key components that stress the crop productivity. This can be overtaken by the microbes that can function as both “bio-fertilizer” and “antagonistic” agents, mentioned as Plant growth-promoting rhizobacteria(PGPR), as they present satisfactory, advantageous impact when ever required, due to their presence in the rhizospheric region, by providing nutrients uptake from soil and controlling the unnecessary hazardous bio-impact on plants .Present study relies on sustainable agricultural development that utilizes the bacteria from the rhizospheric region thereby recommending bio-formulation in the future to mobilize the unaware farmer for better productivity, free of devastating chemical components that enter the food chain via crop produced by using chemicals, and also by easy means without affecting the surrounding environment and human health. In this context, Sclerotium rolfsii, a deleterious pathogen that affects groundnut crops predominantly, how best can be prevented and can be suppressed by using beneficial PGPR is been studied.

scholarly journals Effect of Inoculation of Plant Growth Promoting Rhizobacteria (PGPR) Mix I Formulations on Plant Growth, Yield, Disease Incidence and Disease Severity of Rhizoctonia Leaf Blight of Amaranthus (Amaranthus tricolor L.)

2021 ◽  
Author(s):  
A.R. Resmi ◽  
B. Lovely ◽  
A. Jayapal ◽  
G. Suja ◽  
N. Chitra
Keyword(s):  
Plant Growth ◽  
Disease Severity ◽  
Agricultural Research ◽  
Disease Incidence ◽  
Growth Yield ◽  
Plant Growth Promoting Rhizobacteria ◽  
Leaf Blight ◽  
Research Station ◽  
Plant Growth Promoting ◽  
Growth Promoting

Background: Amaranthus is the most popular and commercially cultivated leafy vegetable in the Southern part of India, especially Tamil Nadu and Kerala which is susceptible to a number of diseases. Among the different diseases affecting amaranth, foliar blight caused by Rhizoctonia solani Kuhn, is considered as the most serious disease in Kerala. Methods: A field experiment was taken up at Onattukara Regional Agricultural Research Station (O.R.A.R.S), Kayamkulam, Alappuzha, Kerala during December 2019 to February 2020 to assess the influence of dust and liquid formulations of Plant Growth Promoting Rhizobacteria (PGPR) mix I on growth, yield and disease incidence (Rhizoctonia leaf blight) in amaranthus. Result: The results of the study reveal that maximum number of leaves, number of branches per plant and yield were produced by the plants that were subjected to seedling root dip with 5% talc formulation followed by drenching with 5% talc solution at 30 DAT and 45 DAT. Regardless of talc or liquid formulation of PGPR mix I (2%) seedling dip followed by drenching at 15, 30 and 45 DAT provided the least disease incidence and disease severity in amaranthus at Onattukara condition. Hence use of PGPR mix I is a prerequisite for effective growth, yield and management of leaf blight of amaranthus at Onattukara.

scholarly journals Drought stress mitigation in Vigna radiata by the application of root-nodulating bacteria

2017 ◽  
Vol 4 (4) ◽  
pp. 209-212 ◽  
Author(s):  
Diksha Kumari ◽  
Dipjyoti Chakraborty
Keyword(s):  
Drought Stress ◽  
Plant Growth ◽  
Vigna Radiata ◽  
Plant Growth Promoting Rhizobacteria ◽  
Vegetarian Diet ◽  
Symbiotic Relationships ◽  
Plant Growth Promoting ◽  
Rhizobial Species ◽  
Growth Promoting ◽  
Potential Use

Plant growth promoting rhizobacteria (PGPR) facilitates plant growth and are of potential use as bio-fertilizer. Pulses are an important protein source in the vegetarian diet and being legumes harbour members of the Rhizobiaceae that form symbiotic relationships and nodules involved in nitrogen fixation. Vigna radiata is one such pulse crop popular in India. Nodulating bacteria were also found to mitigate biotic and abiotc stress and may be used as an alternative to chemical fertilizer for a sustainable agriculture. Here, we review rhizobial species isolated from V. radiata that have offered an efficient drought stress tolerance. 

scholarly journals A rhizosphere isolate from Oryza sativa, Enterobacter cloacae VITTPN2, as a potential plant growth promoting rhizobacteria; an in vitro study

2019 ◽  
pp. 10-17
Author(s):  
Thahiya Naushad ◽  
Neethu Kamarudheen ◽  
Poorna Chandrika Gopal ◽  
Kokati Venkata Bhaskara Rao
Keyword(s):  
Oryza Sativa ◽  
Plant Growth ◽  
Root Length ◽  
Agricultural Research ◽  
Enterobacter Cloacae ◽  
Plant Growth Promoting Rhizobacteria ◽  
Shoot Length ◽  
Research Station ◽  
Plant Growth Promoting ◽  
Growth Promoting

The increasing need for Plant Growth Promoting Rhizobacteria (PGPR) for biofertilizer development is warranted owing to the environmental hazards caused by chemical fertilizers. Our investigation was to isolate, screen and characterize PGPR from rhizospheric soil with potential PGPR properties. Oryza sativa and Saccharum officinarum rhizosphere were collected from the agricultural research station, Virinjipuram, Vellore (12.9202N, 79.1333E), Tamil Nadu, India for PGPR isolation. Eleven distinct isolates of bacteria were grown on Jensen’s (seven) and Pikovskaya’s media (four). Among these, four isolates (TPN1 to TPN4) showed phosphate solubilisation activity. And one isolate TPN2 particularly showed both nitrogen fixation and phosphate solubilization with other PGPR properties. Furthermore, the isolate TPN2 demonstrated promising results in Indole 3-Acetic Acid production (99.29±0.945µg ml-1). Since the isolate TPN2 displayed all PGPR characteristics under study, it was selected for pot culture studies. The seeds treated with TPN2 revealed an increase of 63.6% in shoot length and 14.63% in root length of the okra plant. There was a 74.6% increase in shoot length and a 16% increase in the root length of the tomato plant. Additionally, there was extensive development of lateral roots in okra plant. Henceforth TPN2 was identified as Enterobacter cloacae VITTPN2 (ku951582). This report produced remarkable results which promise the bacterial strain Enterobacter cloacae strain VITTPN2 can be further studied as a prospective biofertilizer.

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