scholarly journals Potential effects of plant growth promoting rhizobacteria (Pseudomonas fluorescens) on cowpea seedling health and damping off disease control

2013 ◽  
Vol 12 (15) ◽  
pp. 1853-1861 ◽  
Author(s):  
N S ◽  
i ◽  
Adhikari A ◽  
Dutta S ◽  
Chattopadhaya A ◽  
...  
Keyword(s):  
Plant Growth ◽  
Disease Control ◽  
Pseudomonas Fluorescens ◽  
Plant Growth Promoting Rhizobacteria ◽  
Damping Off ◽  
Plant Growth Promoting ◽  
Growth Promoting

scholarly journals Plant growth-promoting rhizobacteria induced resistance in Jatropha curcas through phenyl propanoid metabolism against Rhizoctoniabataticola

2017 ◽  
Vol 9 (1) ◽  
pp. 121-128
Author(s):  
S. Kumar ◽  
M. Singh ◽  
Sushil Sharma
Keyword(s):  
Plant Growth ◽  
Pseudomonas Fluorescens ◽  
Jatropha Curcas ◽  
Root Rot ◽  
Plant Growth Promoting Rhizobacteria ◽  
Systemic Resistance ◽  
Total Phenols ◽  
Phenyl Propanoid ◽  
Plant Growth Promoting ◽  
Growth Promoting

The root rot disease in Jatropha curcas L. caused by Rhizoctonia. bataticola (Taub.) Butler has been recorded in causing 10-12 per cent mortality of 20-30 days old seedlings of Jatropha curcasin southern Haryana. The incidence of this disease has also been observed from other parts of Haryana too. Induction of systemic resistance in host plants through microbes and their bioactive metabolites are attaining popularity in modern agricultural practices. Studies on the plant growth-promoting rhizobacteria induced resistance in Jatropha curcas through phenyl propanoid metabolism against Rhizoctoniabataticola were undertaken at Chaudhary Charan Singh, Haryana Agricultural University, Regional Research Station, Bawal. Three plant growth-promoting rhizobacteria (PGPRs) viz., Pseudomonas maltophila, Pseudomonas fluorescens and Bacillus subtilis were evaluated for their potential to induce systemic resistance in Jatropha against root rot. The maximum increase of 97 per cent in total phenols, 120 per cent in peroxidase, 123 per cent in polyphenol oxidase, 101 per cent in phenylalanine ammonia lyase and 298 per cent in tyrosine ammonia lyase was detected in plants raised with Pseudomonas fluorescens+ Rhizoctoniaba-taticola inoculation in Jatropha curcas at 10 days post inoculation against control except total phenols where it was maximum (99%) at 30 DPI. There was slight or sharp decline in these parameters with age irrespective of inoculations. The pathogen challenged plants showed lower levels of total phenols and enzymes. The observations revealed that seed bacterization with Pseudomonas fluorescens results in accumulation of phenolics and battery of enzymes in response to pathogen infection and thereby induce resistance systemically.

scholarly journals PENGEMBANGAN PERTANIAN ORGANIK MELALUI BUDIDAYA TANAMAN PALAWIJA DENGAN APLIKASI TEKNOLOGI RIZOBAKTERI INDIGENOS DI NAGARI SUNGAI DURIAN KABUPATEN SOLOK

2017 ◽  
Vol 1 (2) ◽  
pp. 88
Author(s):  
Yulmira Yanti ◽  
Munzir Busniah ◽  
Trimurti Habazar ◽  
Zulfadli Syarief ◽  
Intan Sari Pasaribu
Keyword(s):  
Plant Growth ◽  
Disease Control ◽  
Community Service ◽  
Plant Growth Promoting Rhizobacteria ◽  
Growth And Yield ◽  
Service Program ◽  
Sweet Potatoes ◽  
Pests And Diseases ◽  
Plant Growth Promoting ◽  
Growth Promoting

ABSTRAK Nagari Sungai Durian Kabupaten Solok merupakan salah satu nagari yang memiliki berbagai permasalahan seperti kekeringan, tingginya jumlah lahan tidur dan jauhnya akses. Tanaman utama yang ditanam saat musim hujan adalah padi sawah, namun sebagian besar lahan menjadi lahan tidur saat musim kemarau. Solusi yang dapat ditawarkan adalah dengan penanaman tanaman palawija yang lebih tahan terhadap kekeringan dan penggunaan rizobakteri sebagai agens pengendali hama dan penyakit. Selain sebagai agens pengendali hama dan penyakit, penggunaan rizobakteri juga sebagai PGPR (Plant Growth Promoting Rhizobacteria) yang mampu meningkatkan pertumbuhan dan hasil tanaman. Tujuan dari program pengabdian masyarakat ini adalah memberikan pengetahuan kepada masyarakat dalam budidaya tanaman palawija dengan aplikasi teknologi rizobakteri indigenos. Kegiatan ini dilakukan dengan cara sosialisasi dan demonstrasi plot. Adapun luaran yang didapat dari program pengabdian masyarakat ini adalah :1) Masyarakat mendapatkan pengetahuan serta menguasai teknik budidaya tanaman palawija yang baik (jagung, singkong dan ubi jalar); 2) pengetahuan mengenai teknologi pemanfaatan rizobakteri sebagai agens hayati dalam pengendalian hama dan penyakit tanaman serta peningkatan pertumbuhan dan hasil tanaman palawija; 3) Mendapatkan produk pertanian organik (jagung, singkong dan ubi jalar) yang bebas dari penggunaan pupuk dan pestisida sintetik. Kata kunci : Agens hayati, Rizobakteri, PGPR, Tanaman palawija ABSTRACT Nagari Sungai Durian of Solok District is one of the village that has various problems such as drought, high number of unused land and the distance of urban access. The main crops in this village grown during the rainy season are wetland paddy, but most of the land becomes unused during the dry season. The solution that can be offered is by planting crops that are more resistant to drought and the use of rhizobacteria as pest and disease control agents. In addition to pest and disease control agents, the use of rhizobacteria which also called PGPR (Plant Growth Promoting Rhizobacteria) that can increase growth and yield of plants. The purpose of this community service program is to provide knowledge to the community in the cultivation of secondary crops with the application of indigenous rhizobacteria technology. This activity is done by socialization and demonstration plot. The outcomes obtained from this community service program are: 1) Communities gain knowledge and master good cultivation of secondary crops (corn, cassava and sweet potatoes); 2) knowledge of rhizobacteria utilization technology as biological agent in plant pests and diseases control and improvement of crops' growth and yield; 3) Obtain organic agricultural products (corn, cassava and sweet potato) that are free from the use of synthetic fertilizers and pesticides. Keywords: Biological agents, Rhizobacteria, PGPR, Secondary crops

scholarly journals Selection and Assessment of Plant Growth-Promoting Rhizobacteria for Biological Control of Multiple Plant Diseases

2017 ◽  
Vol 107 (8) ◽  
pp. 928-936 ◽  
Author(s):  
Ke Liu ◽  
Molli Newman ◽  
John A. McInroy ◽  
Chia-Hui Hu ◽  
Joseph W. Kloepper
Keyword(s):  
Biological Control ◽  
Plant Growth ◽  
Broad Spectrum ◽  
Plant Growth Promoting Rhizobacteria ◽  
Plant Diseases ◽  
Damping Off ◽  
In Planta ◽  
Plant Growth Promoting ◽  
Growth Promoting

A study was designed to screen individual strains of plant growth-promoting rhizobacteria (PGPR) for broad-spectrum disease suppression in vitro and in planta. In a preliminary screen, 28 of 196 strains inhibited eight different tested pathogens in vitro. In a secondary screen, these 28 strains showed broad spectrum antagonistic activity to six different genera of pathogens, and 24 of the 28 strains produced five traits reported to be related to plant growth promotion, including nitrogen fixation, phosphate solubilization, indole-3-acetic acid production, siderophore production, and biofilm formation. In advanced screens, the 28 PGPR strains selected in vitro were tested in planta for biological control of multiple plant diseases including bacterial spot of tomato caused by Xanthomonas axonopodis pv. vesicatoria, bacterial speck of tomato caused by Pseudomonas syringae pv. tomato, damping-off of pepper caused by Rhizoctonia solani, and damping-off of cucumber caused by Pythium ultimum. In all, 5 of the 28 tested strains significantly reduced three of the four tested diseases, and another 19 strains showed biological control to two tested diseases. To understand the observed broad-spectrum biocontrol capacity, antiSMASH was used to predict secondary metabolite clusters of selected strains. Multiple gene clusters encoding for secondary metabolites, e.g., bacillibactin, bacilysin, and microcin, were detected in each strain. In conclusion, selected individual PGPR strains showed broad-spectrum biocontrol activity to multiple plant diseases.

Inducing salt tolerance in mung bean through coinoculation with rhizobia and plant-growth-promoting rhizobacteria containing 1-aminocyclopropane-1-carboxylate deaminase

2011 ◽  
Vol 57 (7) ◽  
pp. 578-589 ◽  
Author(s):  
Maqshoof Ahmad ◽  
Zahir A. Zahir ◽  
H. Naeem Asghar ◽  
M. Asghar
Keyword(s):  
Salt Tolerance ◽  
Plant Growth ◽  
Pseudomonas Fluorescens ◽  
Mung Bean ◽  
Acc Deaminase ◽  
Plant Growth Promoting Rhizobacteria ◽  
Saline Stress ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Axenic Conditions

Twenty-five strains of plant-growth-promoting rhizobacteria (PGPR) containing 1-aminocyclopropane-1-carboxylate (ACC) deaminase and 10 strains of rhizobia were isolated from rhizosphere soil samples and nodules of mung bean. They were screened in separate trials under salt-stressed axenic conditions. The three most effective strains of PGPR (Mk1, Pseudomonas syringae ; Mk20, Pseudomonas fluorescens ; and Mk25, Pseudomonas fluorescens biotype G) and Rhizobium phaseoli strains M1, M6, and M9 were evaluated in coinoculation for their growth-promoting activity at three salinity levels (original, 4 dS·m–1, and 6 dS·m–1) under axenic conditions. The results showed that salinity stress significantly reduced plant growth but inoculation with PGPR containing ACC deaminase and rhizobia enhanced plant growth, thus reducing the inhibitory effect of salinity. However, their combined application was more effective under saline conditions, and the combination Mk20 × M6 was the most efficient for improving seedling growth and nodulation. The effect of high ethylene concentrations on plant growth and the performance of these strains for reducing the negative impact of saline stress was also evaluated by conducting a classical triple-response bioassay. The intensity of the classical triple response decreased owing to inoculation with these strains, with the root and shoot lengths of inoculated mung bean seedlings increasing and stem diameter decreasing, which is a typical response to the dilution in a classical triple response bioassay. Thus, coinoculation with PGPR containing ACC deaminase and Rhizobium spp. could be a useful approach for inducing salt tolerance and thus improving growth and nodulation in mung bean under salt-affected conditions.

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