PGPR-induced defense responses in the tea plant against blister blight disease

Saravanakumar, D.; Vijayakumar, Charles; Kumar, Naresh; Samiyappan, R.

doi:10.1016/j.cropro.2006.05.007

Cited by 220 publications

(93 citation statements)

References 54 publications

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“…Positive effect of microbiolization by the Gram-positive rhizobacteria B. cereus and P. fluorescens, has already been reported by Saravanakumar et al (2007), who have observed increases varying from 37% to 50% on percentage emergence of seeds of Tea (Camellia sinensis L.). Kishore and Pande (2007) have observed increase that ranged from 12% to 19%, on emergence of peanut seeds, induced by Gram-positive bacterium B. megaterium.…”

Section: Resultsmentioning

confidence: 67%

Physiological potential of rice seeds treated with rhizobacteria or the insecticide thiamethoxam

Soares

Tillmann

Moura

et al. 2012

Rev. bras. sementes

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ABSTRACT-Development of new technologies, aiming at increasing productivity in different crops, involves constant research on the effectiveness and application of these techniques in seed treatment. In this study, it was aimed at evaluating physiological potential of rice seeds treated with plant growth-promoting rhizobacteria (PGPR) (strains DFs185, DFs223, DFs306, DFs416), or with two dosages of the insecticide thiamethoxam. The variables assessed were: germination (G); first count of germination (FCG); cold test (CT); length of seedlings aerial parts (LAP), root system (LRS), and total length (TL); emergence speed index (ESI); emergence (E), at 14 days; and dry phytomass (DP). Treatments have had a positive effect on percentage of G, FCG and E. The strain DFs185 has promoted increase in percentage emergence, for five of the six lots assessed. The variables: LAP; LRS; TL; ESI; and DP have undergone low or none influence of treatments; and there has been no toxic effect of rhizobacteria or insecticide thiamethoxam. In the cold test, a negative effect of treatments has been detected. Seed treatment with rhizobacteria, as well as with thiamethoxam, improve quality of low quality rice seeds. The strain DFs185 is promising for treating rice seeds, once it stimulates seed germination and emergence.

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Section: Resultsmentioning

confidence: 67%

Physiological potential of rice seeds treated with rhizobacteria or the insecticide thiamethoxam

Soares

Tillmann

Moura

et al. 2012

Rev. bras. sementes

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“…Saravanakumar et al (2007a) demonstrated that application of talc-based bioformulation of P. fluorescens Pf1 consistently reduced the blister blight disease and increased the yield on tea plants. The same research group has demonstrated that P. fluorescens Pf1 effectively controlled the dry root rot disease on mung bean plants (Saravanakumar et al, 2007b). Further, seed treatment, soil application and seedling dip of talc-based bioformulation of Pf1 effectively reduced the sheath rot disease on rice plants under glasshouse and field conditions (Manikandan et al, 2010).…”

Section: Carriersmentioning

confidence: 91%

A review on plant growth promoting rhizobacteria acting as bioinoculants and their biological approach towards the production of sustainable agriculture

Nehra

Choudhary

2015

JANS

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Plant growth promoting rhizobacteria are the soil bacteria inhabiting around/on the root surface and are directly or indirectly involved in promoting plant growth and development via production and secretion of various regulatory chemicals in the vicinity of rhizosphere. There has been much research interest in PGPB and there is now an increasing number of PGPB being commercialized for various crops. Today a lot of efforts have been made for searching and investigating the PGPB and their mode of action, so that they can be exploited commercially as biofertilizers. Because of the various challenges faced in screening, formulation, and application, PGPB have yet to fulfill their promise and potential as commercial inoculants. Recent progress in our understanding of their diversity, colonization ability, mechanisms of action, formulation, and application should facilitate their development as reliable components in the management of sustainable agricultural systems. Several reviews have discussed specific aspects of PGPB as bioinoculants. We have tried to critically evaluate the current status of bacterial inoculants for contemporary agriculture in developed and developing countries. This review focuses on some important information regarding the biofertilizing potential of some important group of microbes, their formulations, their application for the development of sustainable technology, scope of improvement by genetic engineering, steps to be undertaken for their commercialization and their future prospects.

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“…They reduce disease severity and enhance yield of many crops (Liu et al, 1995;Murphy et al, 2000). In the context of the international concern for food and environmental quality, the use of PGPR has been applied to various crops to enhance growth, seedling emergence and crop yield, and some have been commercialized (Herman et al, 2008;Nayaka et al, 2009;Choong-Min et al, 2007;Saravanakumar et al, 2007;Murphy et al, 2003;Zhang et al, 2004). Rhizobial inoculants have also been reported to improve nutrient uptake, growth, seedling vigor and yield of rice (Biswas et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

Plant growth-promoting rhizobacteria mediate induced systemic resistance in rice against bacterial leaf blight caused by Xanthomonas oryzae pv. oryzae

et al. 2011

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a b s t r a c tSeven Bacillus plant growth-promoting rhizobacteria spp. were evaluated for growth promotion and induced systemic resistance in rice against Xanthomonas oryzae pv. oryzae (Xoo). The identities of colonies of X. oryzae pv. oryzae grown on mXOS and PSA medium were confirmed by PCR employing specific primers TXTF and TXT4R. Among the seven strains tested as fresh suspensions, talc and sodium alginate formulations under laboratory and green house conditions, maximum germination of 86% was recorded after seed treatments with fresh suspension of Bacillus subtilis GBO3 followed by 85% germination treated with Bacillus pumilus SE34 in comparison to only 71% germination in the untreated controls. Similarly, the maximum vigor index of 1374 was obtained by seed treatment with fresh suspensions of B. subtilis strain GBO3 followed by treatments with strain SE34 with vigor index of 1323 in contrast to an index of only 834 observed in untreated controls. Among the treatments, seed treatments with fresh suspension of seven strains resulted in better germination and vigor assessments than talc based or sodium alginate formulations. Seed treatments with fresh suspension of strain SE34 gave 71% protection, followed by B. subtilis GBO3 and B. pumilus T4 with 58% and 52% protection, respectively, compared to the untreated controls. Seed treatments with talc based formulation of SE34 gave 66% protection, while GBO3 and T4 resulted in 52% and 50% protection, respectively, with similar formulation. Seed treatment with talc and sodium alginate formulations of strain SE34 gave 58% protection followed by GBO3 with 40% protection. Seed treatment with fresh suspensions of strains SE34 and GBO3 followed by challenge inoculations with Xoo increased accumulation of phenylalanine ammonia lyase, peroxidase and polyphenol oxidase compared to untreated control seedlings. Thus, the results of the present study suggest that the PGPR strains used as fresh suspensions and powdered formulations may have commercial potential in plant growth promotion and in management of rice bacterial leaf blight disease.

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PGPR-induced defense responses in the tea plant against blister blight disease

Cited by 220 publications

References 54 publications

Physiological potential of rice seeds treated with rhizobacteria or the insecticide thiamethoxam

Physiological potential of rice seeds treated with rhizobacteria or the insecticide thiamethoxam

A review on plant growth promoting rhizobacteria acting as bioinoculants and their biological approach towards the production of sustainable agriculture

Plant growth-promoting rhizobacteria mediate induced systemic resistance in rice against bacterial leaf blight caused by Xanthomonas oryzae pv. oryzae

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