R. Sridar

Tamil Nadu Agricultural University

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R. Anandham

Tamil Nadu Agricultural University

M. Sivaji

Tamil Nadu Agricultural University

R. Jeyarajan

Tamil Nadu Agricultural University

Munusamy Madhaiyan

Temasek Life Sciences Laboratory

P. Nalayini

Central Institute for Cotton Research

Pandiyan Indira Gandhi

Tamil Nadu Agricultural University

Tongmin Sa

Chungbuk National University

G. Ramakrishnan

Université Laval

K. Veerender

S. Priyanka

Tamil Nadu Agricultural University

Cooperative Institutions

Tamil Nadu Agricultural University

Chungbuk National University

Daegu University

Saveetha University

Reliance Industries (India)

Indian Institute of Oilseeds Research

Temasek Life Sciences Laboratory

National University of Singapore

Central Institute for Cotton Research

Central Institute of Fisheries Technology

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Genetic diversity of sulphur oxidizing bacteria from different ecosystems

R. Sridar K. Veerender M. Sivaji R Gayathri

Sulphur is one of the fourth major nutrients after N, P, and K for oil crops and pulses. To explore the possibility of meeting the sulphur nutrition of groundnut crop through bioinoculant, in the present study, a total of 24 isolates of sulphur oxidizing bacteria (SOB) obtained from different ecosystems were screened. Among the screened isolates, VSS4 isolate produced 72 mg 100 mL -1 sulphate from elemental sulphur. Species diversity, phylogenetic affiliations and environmental occurrence patterns of SOB were investigated by amplified ribosomal DNA restriction analysis (ARDRA). Finally, based upon the suphate production, pH reduction and other biochemical studies, four isolates, viz.,VSS4, VSM8, VSB3 and VST3, were selected for the study of genetic diversity between different ecosystems by using 16S ribosomal RNA (rRNA) gene sequences and phylogenetic analysis. SOB isolates VSS4, VSM8, VSB3 and VST3 were identified as Pseudomonas sp., Burkholderia sp., Exiguobacterium sp., and Bacillus sp., respectively. For the conformation of their chemoautotrophic nature, the selected isolates were screened with the primers of cbbL (form I), cbbM (form II) genes of ribulose 1,5-bisphosphate carboxylase/oxygenase (RuBisCO). All the four selected isolates were chemoautotrophic in nature as they showed the presence of cbbL (form I) gene.

Phylogenetic diversity

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Use of sulphur bacteria for increased yield and oil content of groundnut.

R. Anandham R. Sridar S. Kannaiyan Krishna Kumar K. Govindarajan

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Evaluation of Gypsum as a Carrier in the Formulation of Trichoderma viride

Journal of Biological Control (1995)

K. Renganathan R. Sridar R. Jeyarajan

At present there is considerable pressure from public and environment scientists to go for biocontrol agents, to prevent the environmental pollution caused by pesticides. Use of Trichoderma viride Pers.exfr, was reported to be effective in reducing the propagules of seed as well as soil-borne pathogens (Papavizas, 1984). Ramakrishnan et al. (1994) developed a talc-based product of T. viride . Jeyarajan et al. (1994) reported that the talc-based T. viride when used for seed treatment @ 4 g/kg seed reduced the root rot of pulses and oilseeds. The cost of the talc powder is Rs.10/kg which has a major share in the production cost of Trichoderma product.

Trichoderma viride

Talc

Propagule

Trichoderma

Environmental Pollution

10.18311/jbc/1995/7627

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Sulfur-oxidizing Bacteria: A Novel Bioinoculant for Sulfur Nutrition and Crop Production

Springer eBooks (2011)

R. Anandham Pandiyan Indira Gandhi M. Senthilkumar R. Sridar P. Nalayini

Oxidizing agent

Sulfur Cycle

10.1007/978-3-642-21061-7_5

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Studies on the Efficacy of Different carriers for Antagonistic Bacillus subtilis (Cohn)

Journal of Biological Control (1993)

R. Sridar G. Ramakrishnan D. Dinakaran R. Jeyarajan

Bacillus subtilis (Cohn) has been used for many years to control plant pathogens and to increase plant growth (Turner and Backman, 1991). This bacterial antagonist is known to produce extracellular antibiotics, that are inhibitory to some plant pathogens (Podile et al., 1988). A commercial preparation of B.subtilis A.13 has been developed under the trade name Quantum 4000 and is recommended for treatment of peanut seeds for the control of soil borne diseases (Weller, 1988). With the intention of developing an inexpensive B. subtilis inoculant that can be easily applied, an experiment was conducted in our laboratory.

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Development of pellet formulation of sulphur oxidizing bacterium (SOB) for groundnut.

R. Anandham R. Sridar S. Kannaiyan K. Sathish Kumar K. Govindarajan

Pellet

Oxidizing agent

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Effect of Carbofuran on the Biocontrol Agent Trichoderma viride

Indian journal of plant protection (1997)

R. Sridar A. Regupathy

Carbofuran

Trichoderma viride

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Efficacy of two antibiotics against bacterial flacherie of silkworm, Bombyx mori L.

Indian Journal of Sericulture (2000)

R. Sridar A. Subramanian N. Chandramohan

Sericulture

Soil bacteria

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Potential for plant growth promotion in groundnut (Arachis hypogaea L.) cv. ALR-2 by co-inoculation of sulfur-oxidizing bacteria and Rhizobium

Microbiological Research (2006)

R. Anandham R. Sridar P. Nalayini Selvaraj Poonguzhali Munusamy Madhaiyan

Arachis hypogaea

Thiobacillus

10.1016/j.micres.2006.02.005

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Citations (84)

Impact of Bt Cotton on the Functional Microbes in the Rhizosphere Under In Vitro Condition

Trends in Biosciences/Trends in biosciences (2014)

M. Sivaji R. Sridar

In the present study, population of functional microbes was enumerated and compared from the Bt and non Bt cotton rhizosphere. On comparison of microbial population in Bt and non Bt cotton rhizosphere A. brasilense was more at 15 and 60 DAS, whereas P. fluorescens was more at 15, 30 and 45 DAS and B. megaterium population was more in Bt cotton in all sampling stages but T. viride recorded less population at 60 DAS in Bt cotton rhizosphere. Variation in the terms population of functional microbes were observed between Bt and non Bt cotton rhizosphere, but the variation was not statistically significant at any stage. Same trend of microbial population was followed between Bt and non Bt cotton. So under the green house condition Cry protein which released from the root exudates of the Bt cotton is not having any impact of the selected functional microbial population.

Bt Cotton

Gossypium

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