Screening of Actinomycete Isolates from Niche Habitats in Manipur for Antibiotic Activity

Ningthoujam, Debananda S.; Sanasam, Suchitra; Salam, Nimaichand

doi:10.3844/ajbbsp.2009.221.225

Cited by 38 publications

(20 citation statements)

References 22 publications

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“…In addition, biocontrol agents isolated outside the region and imported to Africa have performed inconsistently under field conditions (12). The development of indigenous biocontrol strains that suit local environments may help enhance competitiveness with in situ microorganisms and effectiveness at suppressing local pathogen strains (13).…”

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confidence: 99%

Phytobeneficial Properties of Bacteria Isolated from the Rhizosphere of Maize in Southwestern Nigerian Soils

Abiala

Odebode

Hsu

et al. 2015

Appl Environ Microbiol

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bBiocontrol agents isolated outside Africa have performed inconsistently under field conditions in Africa. The development of indigenous phytobeneficial microbial strains that suit local environments may help enhance competitiveness with in situ microorganisms and effectiveness at suppressing local pathogen strains. We isolated bacteria from the rhizosphere of maize growing in southwestern Nigeria and assessed them for growth-promoting characteristics. The best isolates were characterized using 16S rRNA genes and were further evaluated in the greenhouse on maize seedlings. Four isolates (EBS8, IGBR11, EPR2, and ADS14) were outstanding in in vitro assays of antagonistic activity against a local strain of Fusarium verticillioides, phosphate solubilization efficiency, chitinase enzyme activity, and indole-3-acetic acid production. Inoculation of maize seeds with these isolates resulted in >95% maize seed germination and significantly enhanced radicle and plumule length. In the greenhouse, maize seedling height, stem girth, number of leaves, leaf area, shoot mass (dry matter), and nutrient contents were significantly enhanced. The bioprotectant and phytobeneficial effects were strongest and most consistent for isolate EBS8, which was identified as a Bacillus strain by 16S rRNA gene analysis. As a bacterial strain that exhibits multiple growth-promoting characteristics and is adapted to local conditions, EBS8 should be considered for the development of indigenous biological fertilizer treatments. Maize was traditionally grown as a subsistence crop on small plots in home gardens in West and Central Africa, but it has recently expanded into a local "cash crop," especially in southwestern Nigeria, where Ͼ30% of cropland is devoted to maize production (1). However, maize productivity is often low in Nigeria due to a combination of agrobiological (2), climatic (3, 4), and technological (5) factors coupled with high postharvest losses (6). In addition to continued soil nutrient limitation (5), diseases such as downy mildew, rust, leaf blight, leaf spot, maize streak virus, and root, stalk, collar, and ear rots (7, 8) are among the major factors that limit maize production in southwestern Nigeria. Thus, national and international bodies have raised a global call to promote maize production through the management of biological communities associated with agroecosystems, which is an environmentally friendly and cost-effective strategy (4). In this regard, the use of plant growth-promoting rhizobacteria (PGPR) can play an important role in developing sustainable systems of crop production (9). PGPR can play a pivotal role in crop production by means of siderophore production, antagonism to soilborne root pathogens, phosphate solubilization, and dinitrogen fixation (10). PGPR are also known to alter root morphology and enhance the uptake of essential nutrients by plants (10).Despite the potential benefits of using rhizobacteria to enhance crop protection (11), they remain largely untapped in the effort to improve maize producti...

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confidence: 99%

Phytobeneficial Properties of Bacteria Isolated from the Rhizosphere of Maize in Southwestern Nigerian Soils

Abiala

Odebode

Hsu

et al. 2015

Appl Environ Microbiol

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“…Revegetation of tailings with wetlands should be sustainable for indefinite periods of time. The vegetation component provides the source of organic matter needed to drive the chemical reduction of sulphides and the subsequent precipitation of metal sulphides (Ningthoujam et al, 2009). Through these processes the metals and sulphates are returned to the form they were derived from originally in the mining process, as many metal ores are sulphide in nature.…”

Section: Resultsmentioning

confidence: 99%

Developmental Design of Anaerobic Wetland System for Mining Waste Water Treatment

Ashraf¹

2011

American Journal of Environmental Sciences

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Problem statement: Tin mining is one of the oldest industries in Malaysia that have started since 1820s. These mining activities have resulted in about 13,700 hectors of tin tailings throughout the peninsula. These tailings have created numerous environmental problems such as threat to natural reserves due to landscape changes, damage to natural drainage, pollution and destruction of natural habitats. Approach: This research provided an approach for designing a constructed wetland system for treatment of tin-contaminated wastewater from mining catchment, a system that is known to provide a more economical treatment than the conventional system. Design of wetland was mostly based on the review of scientific literature, theoretical modelling and verification of performance via a pilot system. Results: Initially, physio-chemical characteristics and concentration of heavy metals in the soil and ponds were evaluated. It was found that the soil and water quality of area is highly degraded. This study will help for the design of the wetland for wastewater treatment. The study area consists of five mined out ponds in the catchment, each pond arranged in series with a 48 h hydraulic retention time. Wetland system comprises of three compartments in series-an 'inflow' pond receiving untreated tailings water overflowing into a wetland compartment, which in turn overflows into an 'outflow' pond receiving the now treated water. Each compartment filled with approximately 50 cm depth of a mixture of the cattle manure as (25%) and municipal waste compost (75%) as substrate. Waterproof baffles in each wetland compartment serve to increase the flow path of the water, thereby increasing the potential for sulphate retention. Additionally 30 tonnes of limestone will be deposited at the far end of the wetland, to facilitate final pH adjustment if it should be required. On site a computer connected to the pumps regulates the flow of tailings water through the systems. Conclusion: The planting density chosen is based on similar research on constructed wetlands. Proposed anaerobic wetland is first of its kind introduce for mining waste water treatment in Malaysia. Good results have achieved on laboratory scale operations for this system.

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“…All studies were mainly based on ecological and socio-economic studies (Jain et al, 2011;Ngasepam et al, 2015;Jain et al, 2007;Ningthoujam et al, 2009;Rai and Raleng, 2011;Rai and Singh, 2014). It is also found that there is lack of educational/institutional scientific research as all studies were mainly carried out by Government set up organization like Loktak Development Authority; Directorate of Environment).…”

Section: Resultsmentioning

confidence: 99%

Status of wetlands valleyed in a hilly region of North East India - A review

Devi¹,

Oinam²,

Singh³

et al. 2017

Int. J. Water Res. Environ. Eng.

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A key to future sustenance of human societies lies in the sustainable management and wise use of Wetlands. Wetlands are frequently referred to as Kidneys of Landscape; are amongst the most productive ecosystems on the earth and any alterations might lead to changes in their bio-physical, socio-economic and climatic conditions. Due to various factors like rapid urbanization, industrialization and agricultural activities; Wetland ecosystems become the most threatened of all environmental resources on earth. The call for its protection gained in early 1960's globally. However, in India, the momentum for its protection gained only in late 1980's. In order to make effort to restore and protect such degraded Wetlands, its extensive study is required in terms of its ecological changes with its areal extent. There is a huge gap of scientific study about the Wetlands in India especially in this study region (Manipur) and eventually people could not recognise the importance of Wetland services given to mankind. Therefore, this study is aimed at reporting the status of Wetland exists in Manipur (a small state of North-Eastern India surrounded by hilly terrains) as a first step for further studies. The lack of scientific studies about the Wetlands in this particular study region is also reported in this paper.

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Screening of Actinomycete Isolates from Niche Habitats in Manipur for Antibiotic Activity

Cited by 38 publications

References 22 publications

Phytobeneficial Properties of Bacteria Isolated from the Rhizosphere of Maize in Southwestern Nigerian Soils

Phytobeneficial Properties of Bacteria Isolated from the Rhizosphere of Maize in Southwestern Nigerian Soils

Developmental Design of Anaerobic Wetland System for Mining Waste Water Treatment

Status of wetlands valleyed in a hilly region of North East India - A review

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