scholarly journals INOCULATION WITH N2-FIXING PLANT GROWTH PROMOTING RHIZOBACTERIA TO REDUCE NITROGEN FERTILIZER REQUIREMENT OF LETTUCE

2020 ◽  
Vol 19 (5) ◽  
pp. 23-35
Author(s):  
Haluk Çağlar Kaymak ◽  
Adem Aksoy ◽  
Recep Kotan
Keyword(s):  
Plant Growth ◽  
Crop Production ◽  
Growth Yield ◽  
Paenibacillus Polymyxa ◽  
Plant Growth Promoting Rhizobacteria ◽  
Nitrate Accumulation ◽  
Fertilizer Requirement ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Made In

This study was undertaken to determine the effect of three different mixtures of some N2-fixing plant growth-promoting rhizobacteria (PGPR) on growth, yield, element content and nitrate accumulation as well as the effect on the reduction of nitrogen fertilization of lettuce (Lactuca sativa L.). The measurements were made in two separate experiments in 2015 between 6 June – 5 August (Experiment 1) and 2 July – 3 September (Experiment 2) under the field conditions. Butterhead form and heat tolerant summer cultivar ‘Luna’ was used as a plant material. Agrobacterium rubi RK-34, Pantoea agglomerans RK-79 and RK-92, Pseudomonas putida RK-142 and TV-42A, Bacillus megaterium TV-6D, TV-60D and TV-91C, Pseudomonas flourescens TV-11D and Paenibacillus polymyxa TV-12E were used as N2-fixing plant growth promoting rhizobacteria. The treatments were 150 kg N/ha (available dose of AS) as ammonium sulphate (AS) [(NH4)2SO4), (21% N)] and three different mixtures of PGPR. Further, combined uses of decreasing doses of AS (50%, 75 kg ha–1AS and 75%, 112.5 kg ha–1 AS) and PGPR mixtures (M) such as M-1 + 75 AS, M-1 + 112.5 AS, M-2 + 75 AS, M-2 + 112.5 AS, M-3 + 75 AS and M-3 + 112.5 AS were used as additional treatments. All treatments increased the yield and the growth of lettuce according to the control. While inoculation with PGPR mixtures decreased the accumulation of heavy metals such as Cd, Ni, and Pb in lettuce, increased nutrient uptake of lettuce. It was determined that the nitrate accumulation of lettuce (cv. ‘Luna’) in PGPR mixtures were lower than the available dose of AS but higher than control. The yield in M-3 + 112.5 AS (48431 kg ha–1) was similar and in the same statistical group with the available dose of AS (48225 kg ha–1) in both experiments. Furthermore, according to the results of cost analyses, using 25% less of AS (112.5 kg ha–1) with M-3 will supply the same income instead of using AS (150 kg ha–1). It can be clearly said that the mixtures with some N2-fixing plant growth promoting rhizobacteria (PGPR), especially M-3 (P. putida RK-142 + P. flourescens TV-11D + B. megaterium TV-91C), have a great potential to decrease the nitrogen use (25%) for environmentally friendly crop production of lettuce.

scholarly journals Plant-Growth-Promoting Rhizobacteria Emerging as an Effective Bioinoculant to Improve the Growth, Production and Stress Tolerance of Vegetable Crops

2021 ◽  
Vol 22 (22) ◽  
pp. 12245
Author(s):  
Manoj Kumar ◽  
Ved Prakash Giri ◽  
Shipra Pandey ◽  
Anmol Gupta ◽  
Manish Kumar Patel ◽  
...  
Keyword(s):  
Plant Growth ◽  
Crop Production ◽  
Insect Pests ◽  
Vegetable Consumption ◽  
Plant Growth Promoting Rhizobacteria ◽  
Vegetable Crops ◽  
Vegetable Crop ◽  
Plant Growth Promoting ◽  
Growth Promoting

Vegetable cultivation is a promising economic activity, and vegetable consumption is important for human health due to the high nutritional content of vegetables. Vegetables are rich in vitamins, minerals, dietary fiber, and several phytochemical compounds. However, the production of vegetables is insufficient to meet the demand of the ever-increasing population. Plant-growth-promoting rhizobacteria (PGPR) facilitate the growth and production of vegetable crops by acquiring nutrients, producing phytohormones, and protecting them from various detrimental effects. In this review, we highlight well-developed and cutting-edge findings focusing on the role of a PGPR-based bioinoculant formulation in enhancing vegetable crop production. We also discuss the role of PGPR in promoting vegetable crop growth and resisting the adverse effects arising from various abiotic (drought, salinity, heat, heavy metals) and biotic (fungi, bacteria, nematodes, and insect pests) stresses.

scholarly journals Importance of plant growth promoting rhizobacteria (PGPR) in agriculture: A Review

2020 ◽  
Vol 35 (1-2) ◽  
Author(s):  
Tabish Akhtar ◽  
Shubham Kumar ◽  
Sukhdeo Kumar ◽  
M. R. Meena
Keyword(s):  
Plant Growth ◽  
Crop Production ◽  
Plant Pathogens ◽  
Crop Yields ◽  
Plant Growth Promoting Rhizobacteria ◽  
Agricultural Industry ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Increasing Demand ◽  
Environmentally Sound

The growth of plants promoting rhizobacteria (PGPR) has gained widespread importance in agriculture. These are beneficial bacteria found in nature that live actively in plant roots and improve plant growth and increase agricultural productivity.. (PGPR) promoting plant growth shows an important role in the sustainable agricultural industry. The increasing demand for crop production is a major challenge nowadays, with a significant lack of use of synthetic chemical fertilizers and pesticides. The use of PGPR has proven to be an environmentally sound way of increasing crop yields by facilitating plant growth through direct or indirect mechanisms. The mechanisms of PGPR include regulating hormonal and nutritional balance, inducing resistance against plant pathogens, and dissolving nutrients for easy uptake by plants. Furthermore, PGPRs show synergistic and antagonistic interactions with microorganisms within the rhizosphere and in bulk soils, which indirectly increases plant growth rates. There are several bacteria species that act as PGPR. This review summarizes the methodology of PGPR as a bio-fertilizer in agriculture.

scholarly journals PENGARUH PGPR AKAR BAMBU APUS DAN PUPUK LIMBAH CAIR NANAS TERHADAP PERTUMBUHAN BAWANG DAUN UNTUK INFORMASI MASYARAKAT

BIOLOVA ◽  
2020 ◽  
Vol 1 (2) ◽  
pp. 96-107
Author(s):  
Elza - Yulistiana ◽  
Hening Widowati ◽  
Agus Sutanto
Keyword(s):  
Plant Growth ◽  
Crop Production ◽  
Public Information ◽  
Liquid Waste ◽  
Plant Growth Promoting Rhizobacteria ◽  
Agricultural Crop ◽  
Plant Family ◽  
Average Percentage ◽  
Plant Growth Promoting ◽  
Growth Promoting

Increasing agricultural crop production, especially onion, can be done by improving the optimal growing environment for plants. Plant roots can be optimized for the absorption of nutrients and water in the process of photosynthesis. One way that can be used is by applying Plant Growth Promoting Rhizobacteria (PGPR). In addition to increasing the content of micro and macro elements in the soil can also support the growth of leek plants obtained by applying Pineapple Liquid Waste (LCN) made using bacterial isolation and can meet the needs of nutrients in plants. This study aims to determine the effect Plant Growth Promoting Rhizobacteria (PGPR) from Apus (Gigantochola apus) bamboo root and Pineapple Liquid Waste (LCN) fertilizer on the growth of leeks (Allium fistulosum L.), then the results of this study are treated as community information in the form of Leaflets. The method used in this study was an experiment using a Completely Randomized Design (CRD) system consisting of 4x4 factorials with 3 replications. Based on the results of calculations and data analysis, the results show that there is an effect of PGPR and LCN on the growth of scallions on the height and number of tillers per scallion plant family, but there is no influence on pseudo stem circumference and wet weight per scallion plant family, and the results of this study can be used as a source of public information in the form of leaflets with an average percentage included in good eligibility criteria.

scholarly journals Isolation and screening of multifunctional rhizobacteria from the selected sites of Madhupur, Narshingdi and Mymensingh, Bangladesh

2015 ◽  
Vol 2 (1) ◽  
pp. 1-8
Author(s):  
Moonmoon Nahar Asha ◽  
Atiqur Rahman ◽  
Quazi Forhad Quadir ◽  
Md Shahinur Islam
Keyword(s):  
Plant Growth ◽  
Crop Production ◽  
Plant Growth Promoting Rhizobacteria ◽  
N Fixation ◽  
National Botanical Research Institute ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Botanical Research ◽  
Plant Growth Promoting Traits

A laboratory experiment was performed to isolate some native rhizobacteria that could be used as bioinoculants for sustainable crop production. A total of 43 rhizobacteria were isolated from undisturbed plant rhizosphere soils of three different locations of Bangladesh and evaluated their plant growth promoting traits, both direct and indirect. The study has screened out isolates on the basis of their phosphorous solubilization and nitrogen (N) fixation. The phosphate solubilization assay in National Botanical Research Institute of Phosphate (NBRIP) medium revealed that 12 bacterial isolates were able to solubilize tricalcium phosphate and the rhizobacteria M25 showed best performance with a PSI of 3.33 at 5 day. Exactly 47% (20 isolates) of the isolated rhizobacteria were able to grow in N-free Winogradsky’s medium, which is an indication of potential N2-fixers. Among the 20 potential N-fixers, 15 were able to grow within 24 hours of incubation indicating that they are more efficient in Nfixation. The present study successfully isolated and characterized 43 rhizobacteria. Some of these isolated rhizobacteria have potential plant growth promoting traits and are potential plant growth promoting rhizobacteria (PGPR) candidate. Considering all plant growth promoting traits, the isolate F37 was the best followed by M6. However, further experiments are needed to determine the effectiveness of these isolates under in vitro and different field conditions to understand the nature of interaction with the plant and environment.Res. Agric., Livest. Fish.2(1): 1-8, April 2015

Multifaceted Potential of Plant Growth Promoting Rhizobacteria (PGPR)

2021 ◽  
pp. 205-268
Author(s):  
Dwaipayan Sinha ◽  
Suchetana Mukherjee ◽  
Dakshayani Mahapatra
Keyword(s):  
Plant Growth ◽  
Host Plant ◽  
Scientific Community ◽  
Crop Production ◽  
Sustainable Use ◽  
Plant Growth Promoting Rhizobacteria ◽  
Point Of View ◽  
Plant Growth Promoting ◽  
Growth Promoting

Plant growth-promoting rhizobacteria (PGPR) is a unique group of bacteria that colonize the rhizosphere and roots of plants. They are involved in a plethora of interaction with the host plant and benefit the host plant from nutritional and pathological point of view. The beneficial role of PGPR extends from fixation of atmospheric nitrogen, solubilization of phosphates, siderophore production, synthesis of plant growth regulators, and conferring protection to plants through production of antibiotics and ultimately helping the plants in acquiring resistance. The microbes are also being used for bioremediation purposes and thus act as an eco-friendly cleansing agent. PGPR has gained immense interest in the scientific community and have emerged as a very reliable tool for eco-friendly and sustainable approach for crop production. PGPR is a potent candidate of bioprospection for sustainable use in agriculture and bioremediation process for the overall benefit of mankind.

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