Beneficial aspect of weeds

Weeds are considered to be a potential enemy for agricultural development, due to their direct competition with important agricultural crops in the fields. However, weeds do not possess this negative effect only. There exists a way in which one very common wild weed, Medicago, has been used as an aid in agricultural biotechnology through the creation of an indigenous gene pool of Rhizobium meliloti. The potential of Medicago species in future research has also been discussed

Regulatory enzymes for the screening of streptomycin producing mutant strains of Streptomyces griseus.

Intermediary enzymes of streptomycin biosynthesis-arginine amidinotransferase and alkaline phosphatase were located at the early fermentation stages. Their relationship with streptomycin production by Streptomyces griseus strains GX-19 and MR-20 was determined and the use of this relationship was made for the screening of streptomycin producing mutant strains.

Selective strategies for antibiotic fermentation, Part II: Effect of aeration on streptomycin production by Streptomyces griseus JB-19.

The effect of higher aerated fermentation medium which enhanced streptomycin production by Streptomyces griseus JB-19 was found mainly related to the changes in dextrose consumption, inorganic phosphate utilisation and ammonia nitrogen accumulation under optimal and suboptimal supply of soluble vegetative protein.

Selective strategies for antibiotic fermentation. Part I.: The role of soluble vegetative protein in streptomycin production by Streptomyces griseus.

The soluble vegetative protein was found to enhance the production of streptomycin. It seems to be maintaining a balance between glucose consumption and phosphate utilization. Soluble vegetative protein was found to be the chief source of soluble inorganic phosphate, which when monitored along with dextrose addition boosted streptomycin production considerably.