scholarly journals Potential role of compost mixed biochar with rhizobacteria in mitigating lead toxicity in spinach

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Muhammad Zafar-ul-Hye ◽  
Muhammad Tahzeeb-ul-Hassan ◽  
Muhammad Abid ◽  
Shah Fahad ◽  
Martin Brtnicky ◽  
...  
Keyword(s):  
Bacillus Amyloliquefaciens ◽  
Organic Amendments ◽  
Lead Toxicity ◽  
Acc Deaminase ◽  
Dry Weight ◽  
Plant Growth Promoting Rhizobacteria ◽  
Alcaligenes Faecalis ◽  
Growth And Yield ◽  
Pb Toxicity ◽  
Spinach Plant

Abstract Consumption of heavy metals, especially lead (Pb) contaminated food is a serious threat to human health. Higher Pb uptake by the plant affects the quality, growth and yield of crops. However, inoculation of plant growth-promoting rhizobacteria (PGPR) along with a mixture of organic amendments and biochar could be an effective way to overcome the problem of Pb toxicity. That’s why current pot experiment was conducted to investigate the effect of compost mixed biochar (CB) and ACC deaminase producing PGPR on growth and yield of spinach plants under artificially induced Pb toxicity. Six different treatments i.e., control, Alcaligenes faecalis (PGPR1), Bacillus amyloliquefaciens (PGPR2), compost + biochar (CB), PGPR1 + CB and PGPR2 + CB were applied under 250 mg Pb kg-1 soil. Results showed that inoculation of PGPRs (Alcaligenes faecalis and Bacillus amyloliquefaciens) alone and along with CB significantly enhanced root fresh (47%) and dry weight (31%), potassium concentration (11%) in the spinach plant. Whereas, CB + Bacillus amyloliquefaciens significantly decreased (43%) the concentration of Pb in the spinach root over control. In conclusion, CB + Bacillus amyloliquefaciens has the potential to mitigate the Pb induced toxicity in the spinach. The obtained result can be further used in the planning and execution of rhizobacteria and compost mixed biochar-based soil amendment.

scholarly journals Compost mixed fruits and vegetable waste biochar with ACC deaminase rhizobacteria can minimize lead stress in mint plants

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Muhammad Zafar-ul-Hye ◽  
Muhammad Tahzeeb-ul-Hassan ◽  
Abdul Wahid ◽  
Subhan Danish ◽  
Muhammad Jamil Khan ◽  
...  
Keyword(s):  
Plant Root ◽  
Growth Yield ◽  
Acc Deaminase ◽  
Dry Weight ◽  
Plant Growth Promoting Rhizobacteria ◽  
Alcaligenes Faecalis ◽  
Mentha Piperita ◽  
Pb Stress ◽  
Plant Growth Promoting ◽  
Phosphorus And Potassium

AbstractHigh lead (Pb) concentration in soils is becoming a severe threat to human health. It also deteriorates plants, growth, yield and quality of food. Although the use of plant growth-promoting rhizobacteria (PGPR), biochar and compost can be effective environment-friendly amendments for decreasing Pb stress in crop plants, the impacts of their simultaneous co-application has not been well documented. Thus current study was carried, was conducted to investigate the role of rhizobacteria and compost mixed biochar (CB) under Pb stress on selected soil properties and agronomic parameters in mint (Mentha piperita L.) plants. To this end, six treatments were studied: Alcaligenes faecalis, Bacillus amyloliquefaciens, CB, PGPR1 + CB, PGPR2 + CB and control. Results showed that the application A. faecalis + CB significantly decreased soil pH and EC over control. However, OM, nitrogen, phosphorus and potassium concentration were significantly improved in the soil where A. faecalis + CB was applied over control. The A. faecalis + CB treatment significantly improved mint plant root dry weight (58%), leaves dry weight (32%), chlorophyll (37%), and N (46%), P (39%) and K (63%) leave concentration, while also decreasing the leaves Pb uptake by 13.5% when compared to the unamended control. In conclusion, A. faecalis + CB has a greater potential to improve overall soil quality, fertility and mint plant productivity under high Pb soil concentration compared to the sole application of CB and A. faecalis.

scholarly journals ACC Deaminase Producing PGPR Bacillus amyloliquefaciens and Agrobacterium fabrum along with Biochar Improve Wheat Productivity under Drought Stress

Agronomy ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 343 ◽  
Author(s):  
Muhammad Zafar-ul-Hye ◽  
Subhan Danish ◽  
Mazhar Abbas ◽  
Maqshoof Ahmad ◽  
Tariq Muhammad Munir
Keyword(s):  
Drought Stress ◽  
Plant Growth ◽  
Grain Yield ◽  
Bacillus Amyloliquefaciens ◽  
Nutrient Retention ◽  
Acc Deaminase ◽  
Growth And Yield ◽  
Yield Traits ◽  
Straw Yield ◽  
Soil Application

Drought stress retards wheat plant’s vegetative growth and physiological processes and results in low productivity. A stressed plant synthesizes ethylene which inhibits root elongation; however, the enzyme 1-Aminocyclopropane-1-Carboxylate (ACC) deaminase catabolizes ethylene produced under water stress. Therefore, the ACC deaminase producing plant growth promoting rhizobacteria (PGPR) can be used to enhance crop productivity under drought stress. Biochar (BC) is an organically active and potentially nutrient-rich amendment that, when applied to the soil, can increase pore volume, cation exchange capacity and nutrient retention and bioavailability. We conducted a field experiment to study the effect of drought tolerant, ACC deaminase producing PGPR (with and without timber waste BC) on plant growth and yield parameters under drought stress. Two PGPR strains, Agrobacterium fabrum or Bacillus amyloliquefaciens were applied individually and in combination with 30 Mg ha−1 BC under three levels of irrigation, i.e., recommended four irrigations (4I), three irrigations (3I) and two irrigations (2I). Combined application of B. amyloliquefaciens and 30 Mg ha−1 BC under 3I, significantly increased growth and yield traits of wheat: grain yield (36%), straw yield (50%), biological yield (40%). The same soil application under 2I resulted in greater increases in several of the growth and yield traits: grain yield (77%), straw yield (75%), above- and below-ground biomasses (77%), as compared to control; however, no significant increases in chlorophyll a, b or total, and photosynthetic rate and stomatal conductance in response to individual inoculation of a PGPR strain (without BC) were observed. Therefore, we suggest that the combined soil application of B. amyloliquefaciens and BC more effectively mitigates drought stress and improves wheat productivity as compared to any of the individual soil applications tested in this study.

scholarly journals Impact of integrated use of enriched compost, biochar, humic acid and Alcaligenes sp. AZ9 on maize productivity and soil biological attributes in natural field conditions

2019 ◽  
Vol 14 (2) ◽  
pp. 101-107 ◽  
Author(s):  
Azhar Hussain ◽  
Maqshoof Ahmad ◽  
Muhammad Zahid Mumtaz ◽  
Farheen Nazli ◽  
Muhammad Aslam Farooqi ◽  
...  
Keyword(s):  
Humic Acid ◽  
Grain Yield ◽  
Soil Quality ◽  
Microbial Biomass Carbon ◽  
Organic Amendments ◽  
Plant Growth Promoting Rhizobacteria ◽  
Growth And Yield ◽  
Maximum Increase ◽  
Maize Productivity ◽  
Biological Attributes

Organic amendments improve the soil quality and plant productivity as well as help in the establishment of introduced bacteria. The present study was conducted to evaluate the interactive impact of organic amendments and plant growth promoting rhizobacteria strain Alcaligenes sp. AZ9 to improve maize productivity and soil quality. organic amendments including rock phosphate enriched compost (RPEC), biochar, and humic acid were applied in soil along with and without Alcaligenes sp. AZ9. The results revealed that the sole application of organic amendments along with Alcaligenes sp. AZ9 showed increase in growth and grain yield of maize. However, a combined application of organic amendments (RPEC, biochar, and humic acid) along with Alcaligenes sp. AZ9 showed maximum increase in plant height up to 14%, shoot dry biomass up to 30%, 1000-grains weight up to 10%, grain yield up to 31%, stover yield up to 34%, and potassium (K) concentration in grains up to 12% as compared to absolute control. The increase in nitrogen (N) and phosphorus (P) concentration in grains was non-significant over control. This treatment also improved soil biological attributes in terms of the bacterial population up to 60%, microbial biomass carbon up to 22%, soil organic carbon up to 29%, and saturation percentage of soil up to 14% as compared to control. It can be concluded that the application of organic amendments improved establishment of introduced bacteria, which could be effective in improving maize growth and yield as well as soil health.

scholarly journals Comparative Effects of Bio-Wastes in Combination with Plant Growth-Promoting Bacteria on Growth and Productivity of Okra

Agronomy ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2065
Author(s):  
Hammad Anwar ◽  
Xiukang Wang ◽  
Azhar Hussain ◽  
Muhammad Rafay ◽  
Maqshoof Ahmad ◽  
...  
Keyword(s):  
Plant Growth ◽  
Soil Health ◽  
Organic Amendments ◽  
Plant Growth Promoting Rhizobacteria ◽  
Fruit Weight ◽  
Growth And Yield ◽  
Plant Growth Promoting Bacteria ◽  
Randomized Design ◽  
Plant Growth Promoting ◽  
Growth Promoting

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.

Rhizobacteria containing ACC-deaminase confer salt tolerance in maize grown on salt-affected fields

2009 ◽  
Vol 55 (11) ◽  
pp. 1302-1309 ◽  
Author(s):  
Sajid Mahmood Nadeem ◽  
Zahir Ahmad Zahir ◽  
Muhammad Naveed ◽  
Muhammad Arshad
Keyword(s):  
Salt Stress ◽  
Salt Tolerance ◽  
Plant Growth ◽  
Ethylene Production ◽  
Acc Deaminase ◽  
Plant Growth Promoting Rhizobacteria ◽  
Growth And Yield ◽  
Negative Effect ◽  
Plant Growth Promoting ◽  
Growth Promoting

Salt stress is one of the major constraints hampering agricultural production owing to its impact on ethylene production and nutritional imbalance. A check on the accelerated ethylene production in plants could be helpful in minimizing the negative effect of salt stress on plant growth and development. Four Pseudomonas , 1 Flavobacterium , and 1 Enterobacter strain of plant growth promoting rhizobacteria containing 1-aminocyclopropane-1-carboxylate (ACC)-deaminase were selected and their effects on growth and yield of maize were investigated to improve the salt tolerance of maize grown on salt-affected fields. The selected rhizobacterial isolates reduced or eliminated the classical “triple” response, indicating their ability to reduce stress-induced ethylene levels. Results showed that rhizobacterial strains, particularly Pseudomonas and Enterobacter spp., significantly promoted the growth and yield of maize compared with the non-inoculated control. Pseudomonas fluorescens increased plant height, biomass, cob yield, grain yield, 1000 grain mass, and straw yield of maize up to 29%, 127%, 67%, 60%, 17%, and 166%, respectively, over the control. Under stress conditions, more N, P, and K uptake and high K+–Na+ ratios were recorded in inoculated plants compared with the control. The results imply that inoculation with plant growth promoting rhizobacteria containing ACC-deaminase could be a useful approach for improving growth and yield of maize under salt-stressed conditions.

scholarly journals UTILIZATION OF PLANT GROWTH PROMOTING RHIZOBACTERIA (PGPR) IN DISEASE CONTROL IMPORTANT IN PLANTS ONION (ALLIUM ASCALONICUM L.)

2018 ◽  
Vol 6 (1) ◽  
pp. 126-136
Author(s):  
Francisco Fernandes ◽  
Abdul Latief Abadi ◽  
Luqman Qurata Aini
Keyword(s):  
Fusarium Wilt ◽  
Manufacturing Industry ◽  
Block Design ◽  
Dry Weight ◽  
Plant Growth Promoting Rhizobacteria ◽  
Household Consumption ◽  
Growth And Yield ◽  
Horticultural Crops ◽  
Randomized Block Design ◽  
Plant Growth Promoting

Red onion (Allium ascalonicum L.) is one of many horticultural crops consumed by humans as a mixture of spices. For household consumption of about 635 700 tonnes, non-household consumption such as the manufacturing industry amounted to 719 200 tonnes, the sum total of 1.35 million meaning that the deficit for the onion. The purpose of this study was to gain insight about PGPR in increasing the growth and yield of onion, PGPR role in controlling the disease in onions, PGPR concentration in controlling the disease in onions and certain PGPR concentration in the application to control diseases in onion. Using a randomized block design (RAK) factorial 5 x 3 and repeated 3 times. The first factor is the concentration of PGPR with 5 levels ie: p0 (control), P1 (5 ml / liter of water / 2 plants), P2 (10 ml / liter of water / 2 plants), P3 (15 ml / liter of water / 2 plants) and P4 (20 ml / liter of water / 2 plants) and the second factor is the interval provision of PGPR with 3 levels namely: I1 (1 week, 1 x application until the age of 60 days, I2 (2 weeks, 1 x application until the age of 60 day) and I3 (3 weeks, 1 x application until the age of 60 days). the results showed that the onion crop by PGPR could increase plant height (21, 67 cm), number of leaves (32.70 cm), the number of tubers per plant (17.69 g), the wet weight of tuber per plot highs (3460.00 g) and dry weight of tuber per plot (3010.20 g). the provision of PGPR can control fusarium wilt on the red onion. the higher concentration of PGPR with intervals of 3 weeks administration can suppress disease. fusarium wilt PGPR concentration of 20 ml/liter of water with intervals of 3 weeks administration can suppress disease attacks fusarium wilt the lowest (5.22%).

scholarly journals Exploring Potential Soil Bacteria for Sustainable Wheat (Triticum aestivum L.) Production

2019 ◽  
Vol 11 (12) ◽  
pp. 3361 ◽  
Author(s):  
Rizwan Ali Sheirdil ◽  
Rifat Hayat ◽  
Xiao-Xia Zhang ◽  
Nadeem Akhtar Abbasi ◽  
Safdar Ali ◽  
...  
Keyword(s):  
Crop Production ◽  
Sandy Loam ◽  
Acc Deaminase ◽  
Dry Weight ◽  
Plant Growth Promoting Rhizobacteria ◽  
Triticum Aestivum L ◽  
Growth Chamber ◽  
In Vitro Assays ◽  
The Impact

The application of plant growth-promoting rhizobacteria (PGPR) could allow growers to reduce the use of synthetic fertilizers and increase the sustainability of crop production. Wheat is the main staple food crop of Pakistan, and few studies have reported on the impact of PGPR on wheat crops. To determine if PGPR can maintain wheat productivity with reduced fertilizer applications, we isolated bacteria from the rhizosphere of wheat grown in sandy loam. We selected 10 strains based on in vitro assays for traits associated with PGPR: ACC deaminase activity, siderophore productivity, P-solubilization, and productivity of indole acetic acid (IAA). Furthermore, the strains were tested in three experiments (using a growth-chamber, pots with an experimental area of 0.05 m2, and a field). Strains that possessed the four traits associated with PGPR increased the shoot length, root length, and fresh and dry weight of plants in the growth chamber study. Similarly, under the pot trial, maximum crop traits were observed under the consortium + half dose, while under field conditions maximum crop parameters were detected in the case of consortium 1 and consortium 2 along with half the recommended dose of fertilizer. This confirms that this consortium could provide growers with a sustainable approach to reduce synthetic fertilizer usage in wheat production.

scholarly journals Plant Growth Promoting Rhizobacterial Mitigation of Drought Stress in Crop Plants: Implications for Sustainable Agriculture

Agronomy ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 712 ◽  
Author(s):  
Omena Ojuederie ◽  
Oluwaseyi Olanrewaju ◽  
Olubukola Babalola
Keyword(s):  
Drought Stress ◽  
Plant Growth ◽  
Acc Deaminase ◽  
Plant Growth Promoting Rhizobacteria ◽  
Crop Growth ◽  
Growth And Yield ◽  
Growth Enhancement ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Effects Of Drought

Abiotic stresses arising from climate change negates crop growth and yield, leading to food insecurity. Drought causes oxidative stress on plants, arising from excessive production of reactive oxygen species (ROS) due to inadequate CO2, which disrupts the photosynthetic machinery of plants. The use of conventional methods for the development of drought-tolerant crops is time-consuming, and the full adoption of modern biotechnology for crop enhancement is still regarded with prudence. Plant growth-promoting rhizobacteria (PGPR) could be used as an inexpensive and environmentally friendly approach for enhancing crop growth under environmental stress. The various direct and indirect mechanisms used for plant growth enhancement by PGPR were discussed. Synthesis of 1-aminocyclopropane−1-carboxylate (ACC) deaminase enhances plant nutrient uptake by breaking down plant ACC, thereby preventing ethylene accumulation, and enable plants to tolerate water stress. The exopolysaccharides produced also improves the ability of the soil to withhold water. PGPR enhances osmolyte production, which is effective in reducing the detrimental effects of ROS. Multifaceted PGPRs are potential candidates for biofertilizer production to lessen the detrimental effects of drought stress on crops cultivated in arid regions. This review proffered ways of augmenting their efficacy as bio-inoculants under field conditions and highlighted future prospects for sustainable agricultural productivity.

scholarly journals WEEDS CONTROL WITH HERBICIDE DOSAGE AND FREQUENCY OF PGPR TOWARD GROWTH AND YIELD OF PADDY CROPS

Agrivet ◽  
2018 ◽  
Vol 24 (1) ◽  
Author(s):  
Avino Sudhana ◽  
Siwi Hardiastuti ◽  
Oktavia Sarhesti Padmini
Keyword(s):  
Block Design ◽  
Dry Weight ◽  
Plant Growth Promoting Rhizobacteria ◽  
Growth And Yield ◽  
Herbicide Application ◽  
Plant Growth Promoting ◽  
Application Frequency ◽  
Weeds Control ◽  
Brix Value ◽  
Range Test

The first aim of this research was to determine dose of herbicide and frequency of Plant Growth Promoting Rhizobacteria application that efficient to control weeds toward growth and yield of paddy crops. fertilization on the growth and brix value of sweet sorghum cultivated on marginal land. The factorial experiment was arranged in randomized completely block design, with three treatments. The first factor was dose of herbicide with three levels: H0 = without herbicide application, H1 = 1,25 L/ha, and H2 = 1,5 L/ha. The second factor was frequency of PGPR applications with three levels: P0 = without PGPR application, P1 = one time application, and P2 = two times application, each treatment was repeated three times.. Analysis of variance was used for data analysis, and than followed with Duncan Multiple Range Test (DMRT) if there was a significant different. The result showed that the herbicide application with cyhalofop-butyl and penoxsulam active ingredient doses of 1,25 L/ha and 1,5 L/ha was significantly increased weeds control efficiency per species above 90% (92-99%), shoot root ratio (34-40%), and dry weight of grain per hectare (7-8 tons/ha) than without herbicide application. Frequency of PGPR applications has no significantly effect on all parameters.Keywords: weeds, herbicide, PGPR, rice

scholarly journals Pemberian Berbagai Dosis Bokashi Jerami Padi yang Difermentasikan dengan PGPR Akar Bambu pada Tanaman Kedelai

2019 ◽  
Vol 9 (1) ◽  
pp. 688-698
Author(s):  
Sariyu Erwan ◽  
Nurul Istiqomah ◽  
Mahdiannoor Mahdiannoor
Keyword(s):  
Rice Straw ◽  
Plant Pathogens ◽  
Dry Weight ◽  
Plant Growth Promoting Rhizobacteria ◽  
Organic Fertilizers ◽  
Growth And Yield ◽  
Humid Climate ◽  
Randomized Design ◽  
Plant Growth Promoting ◽  
Soybean Plants

       Soybeans will usually grow well at an altitude of no more than 500 to 600 m above sea level. Thedry climate is preferred by soybean plants compared to the humid climate. Straw is a vegetative part ofrice plants (stems, leaves, pan stalks) that are not collected when the rice plants are harvested. -One ofthe bokashi rice straw organic fertilizers. Bokashi rice straw contains some essential organic elementsneeded by plants. Plant Growth Promoting Rhizobacteria (PGPR), is one of the biological agents that hasbeen widely used and tested to control various plant pathogens, utilizing bamboo roots as decomposersbecause in the bamboo roots there are bacteria Pseudomonas flourescent and Bacillus polymixa whichcan help the fermentation process. The aim of the study (i) was to find out the effect of giving and (ii) toget the best bokashi rice straw dose on the growth and yield of soybean plants. The study was carried outin Pembakulan Village Batang Alai Timur District, Hulu Sungai Tengah Regency from April to August2018. This study used a single factor randomized design (RBD), grouping based on sunlight distribution.The factors examined were 4 bokashi rice straw doses (j) consisting of j1 = 1.3 kg per plot, j2 = 2.6 kgplot, j3 = 3.9 kg per plot and j4 = 5.2 kg per plot plot. Factors observed were plant height, leaf number,flowering age, number of pods, number of seeds, and dry weight of 100 soybeans. The results of the studydid not indicate the effect of bokashi rice straw on soybean plants.

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