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Modern agriculture faces unprecedented challenges due to climate change, unsustainable farming practices, and declining soil health. In response, nanoparticle-bioinoculants (nano-bioinoculants) have emerged as a promising innovation that integrates nanotechnology with microbial inoculants to enhance plant productivity and sustainability. Conventional agriculture contributes significantly to greenhouse gas emissions, degrades microbial diversity, and compromises ecological balance. Beneficial microbes, known as bioinoculants, play a vital role in improving plant health through nutrient cycling, hormone production, and disease suppression. However, their field performance is often limited by environmental instability and low survival rates. Nanotechnology provides a solution by enabling the encapsulation of bioinoculants within nanoparticles, enhancing their stability, targeted delivery, and effectiveness. These nano-scale carriers exhibit high surface-area-to-volume ratios, improved reactivity, and strong adhesion properties, making them ideal for enhancing microbial colonization and activity in the rhizosphere. Additionally, nanoparticles function as nano-fertilizers and nano-pesticides, supporting both plant nutrition and protection against pathogens. Plant-based nanoparticle synthesis further offers an eco-friendly alternative, minimizing ecological and health risks. Studies demonstrated that nano-bioinoculants improve seed germination, stress resilience, photosynthetic activity, and crop yield across various species. They also mitigate abiotic stresses such as drought, salinity, and heavy metal toxicity while promoting systemic resistance against biotic threats. The synergistic combination of nanoparticles and microbial agents enables multifunctional benefits—supporting soil health, reducing chemical dependency, and enhancing agricultural resilience. While challenges remain in understanding

1. Introduction
All glassware used for bacteriological work must be meticulously cleaned and sterilized. Used and soiled glassware should be thoroughly washed to remove dirt and solid residues before drying and undergoing sterilization.
2. Cleaning of New Glassware
Borosilicate glass (e.g., Pyrex) and factory-washed soda glass require only standard washing before use. However, new, unwashed soda glass needs additional treatment to neutralize alkali content.
• Place the items (e.g., test tubes, Petri dishes, and flasks) in a suitable container, cover with a 1% tri-sodium phosphate solution, and bring to a boil.
• Remove the items, rinse with tap water, and immerse them in a 1% hydrochloric acid solution to neutralize alkalinity.
• Rinse thoroughly with tap water, followed by distilled water. Allow the glassware to dry before sterilization.
3. Cleaning of Used Glassware and Other Apparatus
• Autoclave all glassware contaminated by microorganisms (121°C for 15–20 minutes). This liquefies solid media, facilitating removal.
• Rinse the empty glassware with tap water, then warm water (50–55°C).
• Soak in a detergent solution (e.g., 1% washing soda or tri-sodium phosphate solution) and scrub with a brush.
• Rinse thoroughly with tap water to remove detergent traces, followed by distilled water.

Introduction
Ocular micrometer and stage micrometer are used to measure the size of microorganisms. The Ocular micrometer consists of a circular disk of glass which has graduations engraved on surface. A stage micrometer or objective micrometer has scribed lines on it that are exactly 0.01mm (10 micrometer) apart. Ocular micrometer is calibrated for the objective first. To calibrate the ocular micrometer for a given objective, the two scales are superimposed and determined how many of the ocular gradation coincide with one graduation on the stage micrometer scales. Thus, the distance between the graduations on the ocular micrometer can be determined and so the size of the organism can be determined.
Materials
1. Ocular micrometer
2. Stage micrometer
3. Microscope
4. Stained slides of yeast or bacteria

Introduction
This method consists of mixing the microorganisms in a small amount of India ink or nigrosine and spreading the mixture over a clean slide. These two pigments are not really bacterial stain and do not penetrate the microorganisms. These pigments make the background dark thus making organisms transparent against dark background. This method is useful for determining cell morphology and accurate size as no shrinkage of cells due to heat.
Materials
1. Bacterial culture (B. subtilis)
2. Microscopic slides (Clean, Grease Free)
3. Inoculating needle
4. Cedar wood oil
5. Microscope
6. Xylene

Principle

In this method the estimation of pentose sugar is carried out. Acid hydrolysis of RNA releases ribose (a pentose sugar) which in the presence of strong acid undergoes dehydration to yield furfural. Orcinol, in the presence of ferric chloride as a catalyst, reacts with furfural producing a green colored compound which can be quantitatively estimated at A_{665 nm}. DNA gives a limited positive reaction with Orcinol test.

Materials and Reagents

1. Spectrophotometer
2. Boiling water bath
3. 5% chloroform (HClO₄)
4. Standard RNA solution : Dissolve yeast RNA (500ìg/ml) in 5% HClO₄ . make different dilutions to obtain solutions containing 100 – 500ìg RNA/ml with 5% HClO₄ .
5. Orcinol reagent : Dissolve 100mg of ferric chloride (FeCl₃.6H₂O) in 100 ml of concentration HCl and then add 3.5 ml of 6% solution of Orcinol prepared in alcohol.

The objective of the present investigation was to evaluate the antibacterial properties of cyanobacterial species viz., Anabaena variabilis, Anabaena fertilissima, Nostoc muscorum, Nostoc punctiforme, Nostoc linckia, Nostoc commune, Spirulina platensis., Westiellopsis prolifica and Hapalosiphon sp. against some pathogenic species including Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, Klebsiella pnumoniae and Salmonella typhi. The following are the major findings of the study.

    •    Extracts prepared in methanol were found more active as compared to ethyl acetate, hexane and dichloromethane.
 
    •    Antibacterial activity of extracts varied with the test organisms. Maximum antibacterial activity was shown against Staphylococcus aureus followed by Escherichia coli, Pseudomonas aeruginosa and Salmonella typhi. Klebsiella pneumoniae was found to be least susceptible against all tested cyanobacterial extracts.

    •    Antibacterial activity was observed against both Gram-positive and a spectrum of Gram-negative bacteria by almost all the cyanobacterial species examined in the present study except Westiellopsis prolifica where activity was observed only against S. aureus, a Gram-positive bacterium.

SCARs are DNA fragments amplified by the Polymerase Chain Reaction (PCR) using specific 15-30 bp primers, designed from nucleotide sequences established in cloned RAPD (Random Amplified Polymorphic DNA) fragments linked to a trait of interest. By using longer PCR primers, SCARs do not face the problem of low reproducibility generally encountered with RAPDs. Obtaining a codominant marker may be an additional advantage of converting RAPDs into SCARs. However, SCARs may exhibit dominance when one or both primers partially overlap the site of sequence variation. SCARs are locus specific and have been widely applied in gene mapping studies and marker assisted selection (Paran & Michelmore, 1993).

Synonym : PCR-RFLP (PCR- Restriction Fragment Length Polymorphism)

The Cleaved Amplified Polymorphic Sequence or CAPS method is a technique in molecular biology for the analysis of genetic markers. It is an extension to the Restriction Fragment Length Polymorphism (RFLP) method, using polymerase chain reaction (PCR) to more quickly analyse the results.

Like RFLP, CAPS works on the principle that genetic differences between individuals can create or abolish restriction endonuclease restriction sites, and that these differences can be detected in the resulting DNA fragment length after digestion.

In the CAPS method, PCR amplification is directed across the altered restriction site, and the products digested with the restriction enzyme. When fractionated by agarose or acrylamide gel electrophoresis, the digested PCR products will give readily distinguishable patterns of bands. Alternatively, the amplified segment can by analyzed by Allele specific oligonucleotide (ASO) probes, a process that can often be done by a simple Dot blot.