#exopolysaccharides

[oaresearchpaper]

Maize (Zea mays L.) is an important cereal crop throughout the world. It is highly affected by biotic and abiotic stresses. Water deficiency is a major problem in semi-arid regions of Pakistan. It affects plant growth, therefore there is a huge loss of productivity and yield due to drought. Exopolysaccharides (EPSs) are of high importance for bacteria as a defense mechanism to prevent from desiccation and for adhesions by forming biofilms. EPSs producing bacterial strains were isolated from roots of desert plants of Thal, Pakistan and their potential was compared with pure culture strains Bacillus subtilis and Mycobacterium Barkeri. Effect of inoculation of EPSs producing strains on maize hybrids was evaluated at various moisture levels. The moisture treatments were comprised of 50%, 75% and 100% Field Capacity (FC). Various plant growth and soil parameters were determined. The results showed that the inoculation with Bacillus subtilis (KCTC-3135), Mycobacterium Barkeri (KCTC-3197) and strain (M1) isolated from roots of desert plants of Thal desert reduced the adverse effects of drought significantly. Moreover, inoculation with Bacillus subtilis, Mycobacterium Barkeri and M1 also improved the aggregate stability of soil, which improved water holding capacity of soil thus helping the plants to perform better in drought.

[ijtsrd]

A Review on Plant Growth Promoting Bacteria Ameliorating Salinity Stress

by Metaliya Divya | Bhadaniya Nidhi | Patel Aakruti | Rathod Zalak. R | Saraf Meenu S "A Review on Plant Growth Promoting Bacteria Ameliorating Salinity Stress"

Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-5 | Issue-2 , February 2021,

URL: https://www.ijtsrd.com/papers/ijtsrd38531.pdf

Paper Url: https://www.ijtsrd.com/biological-science/microbiology/38531/a-review-on-plant-growth-promoting-bacteria-ameliorating-salinity-stress/metaliya-divya

callforpaperpapersinjournals, specialissuepublication, multidisciplinaryjournal

Salinity is a biotic stress which is constraint for the plant growth and development, putting agriculture productivity and food security under stress globally. Potential use of plant growth promoting bacteria PGPB ameliorating the salinity stress through number of mechanisms evoking multipronged physiological, biochemical and molecular responses. By developing the novel inoculum for saline soil based on the recent studies concepts can be a sustainable approach in ameliorating productivity of affected agricultural land and food by simultaneously remediating salinity affected agricultural land. The metabolic and genetic properties of the PGPB have direct role in eliminating the harmful effect of salinity. Various mechanism of PGPB includes modification in cell wall cell membrane, development of various enzymes, production of protein performing various metabolic function, production of osmolytes, siderophore production, improving the level of phytohormones auxin, ethylene, cytokinin, abscisic acid, gibberellin , Exopolysaccharide EPS production. In spite of overwhelming advantages exact mechanism of PGPB ameliorating saline stress is not known so it is field to further investigate. 

[scirp]

Read the full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=49759 DOI: 10.4236/abb.2014.510095 Author(s) Rafael Andrade Menolli, Thais Soprani Ayala, Pablo Rodrigo da Rosa, Claudia Rejane Lima de Macedo Costa,Erica Fernanda Osaku, Rosiane G. Mello Zibetti Affiliation(s) Centro de Ciências Médicas e Farmacêuticas, Universidade Estadual do Oeste do Paraná, Cascavel, Brasil. Centro de Ciências Médicas e Farmacêuticas, Universidade Estadual do Oeste do Paraná, Cascavel, Brasil. Centro de Ciências Médicas e Farmacêuticas, Universidade Estadual do Oeste do Paraná, Cascavel, Brasil. Centro de Ciências Biológicas e da Saúde, Universidade Estadual do Oeste do Paraná, Cascavel, Brasil. Centro de Ciências Biológicas e da Saúde, Universidade Estadual do Oeste do Paraná, Cascavel, Brasil. Faculdades Pequeno Príncipe, Curitiba, Brasil. ABSTRACT The diagnosis of Invasive Fungal Disease (IFD) is difficult because the sensitivity of conventional culture and cytology methods for the detection of Aspergillus is poor, and because serological methods exhibit cross-reactivity with environmental fungi. Fungal polysaccharides are of particular interest in the serologic diagnosis of IFD, especially galactomannan (GM) and glucan, which have been recognized as useful tools for the diagnosis of fungal infections. Further investigation into polysaccharide antibody cross-reactivity is important in improving diagnostic tests. Our aim was to verify the production of antibodies against fungal antigens in mice immunized with exopolysaccharides (EPS) obtained from three fungal species (Aspergillus terreus, Paecilomyces variotii and Curvularia brachyspora). ELISA assays were performed to evaluate homologous and heterologous reactions and showed anti-polysaccharide antibodies production. EPS fromA. terreus was immunogenic enough to immunize the animal and lead to antibody production against this EPS. In addition, no cross-reactivity was observed with EPS obtained from P. variotii and C. brachyspora. The EPS from P. variotii did not exhibit good immunogenicity, whereas EPS from C. brachyspora showed good immunogenicity, and heterologous reactions were detected on the ELISA assays performed using the EPS from this species. The results indicate that immunization can occur for environmental fungal polysaccharides, generating antibodies may be interfere in serological diagnosis that are based on detection of fungal polysaccharides, mainly glucans and galactomannans.EWW140919GJR KEYWORDS Exopolysaccharides, Environmental Fungi, Immunization

[saddestboytoholdamartini]

Top 5 favourtie Exopolysaccharides

hyaluronic acid (Streptococcus equi)

schizophyllan (Schizophylum commune)

cellulose (Acetobacter xylinum)

levan (Alcaligenes viscosus, Zymomonas mobilis)

kefiran (Lactobacillus hilgardii)