Beneficial Bacteria and Viruses
By Andrew Schiffman
Agriculture Since these rhizobacteria work so well accelerating plant growth is the reason why PGPR has been recognized worldwide for its agricultural benefits . “The exact mechanism by which PGPR stimulate plant growth is not clearly established” (Auburn, 2012) but there are collections of microbiologist worldwide that are trying to figure out how these rhizobacteria are capable of overtaking the plant roots, creating the promotion of plant growth. This information is really beneficial because the knowledge is gained how some crops are grown so large so fast. it is also helpful knowledge in the way that bacteria can really promote plant growth and development. Another way that PGPRs help with agriculture is that they can act with the same purpose as pesticides, but have less negative effects. Since they use biocontrol, they are able to block off the root systems from pretadors like weeds, fingal and bacterial infections. |
How PGPR is Inserted Into Plants.
Plant growth promoting rhizobacteria is a type of bacteria that uses the technique of biocontrol making it capable to colonizes the roots of plants. To complete this process the PGPR has to be injected into the seed and survive the process, then after that the PGPR must multiply itself to surround the seed and when the roots begin to develop the rhizobacteria must colonize onto the root system. Once in effect Even though it is difficult for these bacteria to colonize, they start to enhance the plant growth directly, this is because it causes the mineral nutrient uptake from the roots to increase. this increased amount of mineral uptake allows the plant to grow a lot more rapidly than before. Giving this plant a much greater growth and capability to produce food than ordinary plants. Plant growth promoting rhizobacteria also promote siderophone production, these "are small compounds that binds to iron in the soil; this can deprive some of the disease-causing microflora of the iron they otherwise need to survive." according to a blog post by ExiteBio. |
-Bacillus Megaterium; A different strain of the bacillus bacterium, provides many of the same functions as the subtilis but has one chracteristic makes it stand out. It is a phosphate solubilizing bacteria which makes phosphate more available to its host plant, therefore the phosphate levels in the soil do not need to be as abundant. So the phosphate no longer needs to be applicated the traditional way. These kind of plant bacteria come with many benefits, plant growth, protection and crop growth are only some of what these bacteria have to offer. |
Bacillus Bacteria
-Bacillus Subtilis; This strain of the Baciluus bacteria has the capability of replacing the key mineral nutrients in the plants soil through both the carbon and the nitrogen cycles. “To aid the carbon cycle B. subtilis degrades thatch, pectin, cellulose and other organic materials.” (Bill, 2013). Subtilis can then produce barriers called biofilms which act as a shield to prevent colonization. after this film is created it is able to keep pathogens out of the plant, a downfall is, when this film is in place good bacteria like PGPR are incapable of colonizing on the plant roots. |
Works Cited
- "Plant Growth-Promoting Rhizobacteria." About PGPR. Auburn University, 21 Mar. 2012. Web. 25 Apr. 2015.
- Kloepper, Joeseph W. "Rhizobacteria." Wikipedia. Wikimedia Foundation, 23 Feb. 2015. Web. 25 Apr. 2015.
- Bill. "Bacteria for Plants." Custom Biologicals. Living-Soils, 20 Mar. 2013. Web. 24 Apr. 2015.
- "6 Ways Bacteria Promote Healthier Plants | Growing Possibilities, A Blog by XiteBio." Growing Possibilities A Blog by XiteBio. XiteBio Technologies Inc., 24 July 2012. Web. 10 May 2015.
- "Bacillus Subtilis Spore." N.p., 2005. Web. 10 May 2015.
- Griffith. "Lab Midterm Slides." StudyBlue. StudyBlue, 2014. Web. 10 May 2015.