Review
Microbial Biotechnology
maryam sajedmarani; Soheila Talesh Sasani; Shohreh Ariaeenejad; Akram Sadeghi
Abstract
Plants with special compounds in their root exudates can strengthen a specific microbial community in the rhizosphere and prevent harmful microbial community from forming. The rhizosphere is a dynamic region around the plant root that is governed by the interaction between the plant and microorganisms. ...
Read More
Plants with special compounds in their root exudates can strengthen a specific microbial community in the rhizosphere and prevent harmful microbial community from forming. The rhizosphere is a dynamic region around the plant root that is governed by the interaction between the plant and microorganisms. Plant root secretions can be influenced by plant species, plant growth stages and stress conditions and can be different; therefore, each microbial strain can regulate the expression of its genes at each stage of plant growth. Microbes are an unknown and huge source of secondary metabolites that play a very important role in the field of medicine and other industries. The present review focuses on factors inducing the production of new secondary metabolites from rhizosphere microbes. Each microbial strain has the potential to produce several compounds, but considering that the production of secondary metabolites is very costly for the cell, their synthesis is highly controlled by the cell. Studies have shown that changing the growth conditions of microbes, such as: temperature, salinity, co-cultivation (bacteria-bacteria, fungi-fungi, bacteria-fungi), change in oxygen concentration, aeration speed, addition of soil elements and rare metal ions, light radiation and also genetic engineering methods such as: insertion of strong inducible promoters, ribosome engineering, chromatin rearrangement, overexpression of pathway-specific regulatory genes and small molecules and chemical stimuli can help to discover new compounds. In this study, the above cases are explained in detail.
Research Paper
Medicinal plant Biotechnology
Leila Akbari; Mehdi Kakaei
Abstract
The most valuable products obtained from the (Peganum Harmala L.) are phenolic compounds and other biochemical contents, which widely is used in treating of many diseases. This study has been done with the goal of evaluating the effect of different habitats on some biochemical and physiological parameters ...
Read More
The most valuable products obtained from the (Peganum Harmala L.) are phenolic compounds and other biochemical contents, which widely is used in treating of many diseases. This study has been done with the goal of evaluating the effect of different habitats on some biochemical and physiological parameters in pecan plant. First, the samples were identified and collected simultaneously in the four studied habitats. A factorial experiment with a completely randomized design with three replications was conducted in the central laboratory of Razi University in 2023. The results showed that, traits has been showed, that there is a significant difference between the ecotypes and also the two leaf and seed samples in the characteristics of total chlorophyll content, soluble sugar, flavonoid and anthocyanin. The results showed that, there is a significant difference between the ecotype and the sample in chlorophyll b index. The difference between the samples is due to the type of ecotype and the effect of the environment. There is a significant positive correlation between chlorophyll a, chlorophyll b and total chlorophyll. Phenol and flavonoid content showed significant negative correlation with total chlorophyll and positive and significant correlation with anthocyanin. Considering the content of biochemical compounds and the high content of phenols and flavonoids as antioxidant compounds in the studied samples, It can be said that ecotype number 2 of Musa Abad village of Hamedan province can be introduced to researchers as a suitable sample for further studies in the field of medicine.
