Importance of plant growth-promoting rhizobacteria in enhancing the seed germination and growth of watermelon attacked by fungal pathogens

In the present study, seven isolates of plant growth-promoting rhizobacteria were used for seed treatment to suppress seedling diseases caused by fungi. Their effect on the seed germination and seedling vigour of watermelon was also studied. Among them INR-7 was able to inhibit a broad range of fungal species, GBO3 and IPC-11 were found to be effective against Fusarium spp. and Didymella bryoniae , while isolates SE-34 and T-4 were effective against Myrothecium species and also reduced the development of symptoms on the seedlings. Isolates GBO3, IPC-11 and INR-7 increased seed germination and seedling vigour to the greatest extent.

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Studies on Effect of Different Propagating Media and Plant Growth Promoting Rhizobacteria on Seed Germination and Seedling Vigour of Rauvolfia tetraphylla Linn.

International Journal of Pure & Applied Bioscience ◽

10.18782/2320-7051.6093 ◽

2017 ◽

Vol 5 (6) ◽

pp. 1411-1419

Author(s):

Anand Jaganath Kademani ◽

Keyword(s):

Seed Germination ◽

Plant Growth ◽

Plant Growth Promoting Rhizobacteria ◽

Seedling Vigour ◽

Plant Growth Promoting ◽

Growth Promoting ◽

Rauvolfia Tetraphylla

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The Effectiveness of Giving Plant PGPR Rhizosphere Bamboo on Cocoa Seeds Germination at The Nursery Level

Biology Medicine & Natural Product Chemistry ◽

10.14421/biomedich.2021.101.1-5 ◽

2021 ◽

Vol 10 (1) ◽

pp. 1-5

Author(s):

Muhammad Yusril Hardiansyah ◽

Yunus Musa ◽

Abdul Mollah Jaya

Keyword(s):

Seed Germination ◽

Plant Growth ◽

Block Design ◽

Plant Growth Promoting Rhizobacteria ◽

Special Treatment ◽

Initial Growth ◽

Seed Growth ◽

Plant Growth Promoting ◽

Growth Promoting

The low productivity of cocoa plantations in Indonesia is partly due to the low quality of seeds, which refers to the impeded growth of cultivated cocoa nurseries. Seed is the initial growth of plants so the importance of giving special treatment to seeds will refer to better seed growth. Provision of Plant Growth Promoting Rhizobacteria (PGPR) microbes can produce indoleacetic acid (IAA) in plants to improve the quality of plant growth. This study aims to determine the effectiveness of the provision of Plant Growth Promoting Rhizobacteria bamboo rhizosphere against cocoa seed germination. The study was carried out in the farmer group garden, Gantarangkeke District, Bantaeng. This study was arranged in the form of a two-factor factorial design (F2F) in a randomized block design (RBD). The use of cocoa seed type as the first factor consisted of GTB (Gantarangkeke Bantaeng) local cocoa seed and MCC 01 cocoa seed and seed immersion treatment at PGPR rhizosphere bamboo concentration as the second factor consisting of 0% (control) concentration, 5%, 10 % and 15%. The results obtained indicate that administration of seeds with bamboo rhizosphere PGPR affects the germination (100.00%), the speed of seed growth (7.14%/etmal), as well as on abnormal seeds (10.00%). So that the provision of bamboo rhizosphere PGPR on cocoa seeds has an effective influence on seed germination and cocoa seedling development.

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Effect of plant growth promoting rhizobacteria (PGPR) in seed germination and root-shoot development of chickpea (Cicer arietinum L.) under different salinity condition

Research in Agriculture Livestock and Fisheries ◽

10.3329/ralf.v3i1.27864 ◽

2016 ◽

Vol 3 (1) ◽

pp. 105-113 ◽

Cited By ~ 4

Author(s):

Mohammad Mosharraf Hossain ◽

Keshob Chandra Das ◽

Sabina Yesmin ◽

Syfullah Shahriar

Keyword(s):

Seed Germination ◽

Plant Growth ◽

Indole Acetic Acid ◽

Phosphate Solubilization ◽

Plant Growth Promoting Rhizobacteria ◽

Matter Production ◽

Wide Range ◽

Positive Growth ◽

Plant Growth Promoting ◽

Growth Promoting

Plant growth promoting rhizobacteria (PGPR) are beneficial bacteria that colonize plant roots and enhance plant growth by a wide variety of mechanisms. Ten isolates of bacteria designated as SS01, SS02, SS03, SS04, SS05, SS06, SS07, SS08, SS09 and SS10 were successfully isolated and morphologically and biochemically characterized. Subsequently to investigate the effect of PGPR isolates on the growth of chickpea, a pot culture experiment was conducted in 2013 at National Institute Biotechnology, Bangladesh net house. Prior to seeds grown in plastic pots, seeds were treated with PGPR isolates and seedlings were harvested after 21 days of inoculation. All the isolates were gram negative in reaction, catalase positive, produced indole acetic acid (IAA) as well as performed phosphate solubilization, able to degrade cellulose and have the adaptability in wide range of temperature and showed positive growth pattern in medium. Most of isolates resulted in a significant increasing of shoot length, root length and dry matter production of shoot and root of chickpea seedlings. Application of PGPR isolates significantly improves the percentage of seed germination under saline conditions. The present study, therefore suggested that the use of PGPR isolates SS04, SS10 and SS08 as inoculants biofertilizers might be beneficial for chickpea cultivation in saline conditionRes. Agric., Livest. Fish.3(1): 105-113, April 2016

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Anti-fungal secondary metabolites and hydrolytic enzymes from rhizospheric bacteria in crop protection: a review

Journal of Bangladesh Academy of Sciences ◽

10.3329/jbas.v44i2.51452 ◽

2021 ◽

Vol 44 (2) ◽

pp. 69-84

Author(s):

Farhana Tasnim Chowdhury ◽

Nazia Rifat Zaman ◽

Mohammad Riazul Islam ◽

Haseena Khan

Keyword(s):

Secondary Metabolites ◽

Plant Growth ◽

Fungal Pathogens ◽

Hydrolytic Enzymes ◽

Plant Growth Promoting Rhizobacteria ◽

Field Conditions ◽

Plant Host ◽

Wide Range ◽

Plant Growth Promoting ◽

Growth Promoting

Plant growth promoting rhizobacteria (PGPR) residing in soil rhizosphere provide enormous beneficial effects to a plant host producing diverse secondary metabolites and enzymes useful for plant growth and protection. Siderophores, antibiotics, volatile compounds and hydrolytic enzymes are the major molecules secreted by the PGPRs, which have substantial antifungal properties and can provide plant protection. These compounds are responsible for the lysis and hyperparasitism of antagonists against deleterious fungal pathogens. Siderophore-producing PGPRs function by depriving the pathogen of iron nutrition. Antibiotics have been reported to be involved in the suppression of different fungal pathogens by inducing fungistasis, inhibition of spore germination, lysis of fungal mycelia. The PGPRs also secrete a wide range of low molecular weight volatile organic compounds (VOCs) that inhibit mycelial growth, sporulation, germination of phytophathogenic fungi, etc. Hydrolytic enzymes, mostly chitinase, protease and cellulose, lyse the cell wall of fungi. Therefore, plant growth-promoting rhizobacteria can be considered as an effective, eco-friendly, and sustainable replacement to the chemical fungicides. There are many PGPRs that perform very well in controlled conditions but not in field conditions, and hence the commercializing of hese products is not easy. Development of formulations with increased shelf life, a broad spectrum of action and consistent performance under field conditions can pave the way for commercializing the PGPRs at a faster rate. Journal of Bangladesh Academy of Sciences, Vol. 44, No. 2, 69-84, 2020

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Amendment of Muskmelon and Watermelon Transplant Media with Plant Growth-Promoting Rhizobacteria: Effects on Seedling Quality, Disease, and Nematode Resistance

HortTechnology ◽

10.21273/horttech.13.3.0476 ◽

2003 ◽

Vol 13 (3) ◽

pp. 476-482 ◽

Cited By ~ 28

Author(s):

Nancy Kokalis-Burelle ◽

C.S. Vavrina ◽

M.S. Reddy ◽

J.W. Kloepper

Keyword(s):

Plant Growth ◽

Pseudomonas Syringae ◽

Leaf Spot ◽

Citrullus Lanatus ◽

Plant Growth Promoting Rhizobacteria ◽

Angular Leaf Spot ◽

Root Weight ◽

Didymella Bryoniae ◽

Plant Growth Promoting ◽

Growth Promoting

Greenhouse and field trials were performed on muskmelon (Cucumis melo) and watermelon (Citrullus lanatus) to evaluate the effects of six formulations of plant growth-promoting rhizobacteria (PGPR) that have previously been shown to increase seedling growth and induce disease resistance on other transplanted vegetables. Formulations of Gram-positive bacterial strains were added to a soilless, peat-based transplant medium before seeding. Several PGPR treatments significantly increased shoot weight, shoot length, and stem diameter of muskmelon and watermelon seedlings and transplants. Root weight of muskmelon seedlings was also increased by PGPR treatment. On watermelon, four PGPR treatments reduced angular leaf spot lesions caused by Pseudomonas syringae pv. lachrymans, and gummy stem blight, caused by Didymella bryoniae, compared to the nontreated and formulation carrier controls. One PGPR treatment reduced angular leaf spot lesions on muskmelon compared to the nontreated and carrier controls. On muskmelon in the field, one PGPR treatment reduced root-knot nematode (Meloidogyne incognita) disease severity compared to all control treatments.

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