Antimicrobial substances from aspen tissue grown in vitro

Science (New York, N.Y.)
|June 7, 1963
PubMed

Insights

Aspen tissue cultures produced antimicrobial compounds effective against various fungi and bacteria. These natural substances show potential for controlling a range of microbial contaminants.

Area of Science:

  • Plant science
  • Microbiology
  • Biochemistry

Background:

  • Plant-derived compounds are a source of novel antimicrobial agents.
  • Investigating antimicrobial properties of aspen (Populus tremuloides) tissue cultures is important for discovering new bioactive molecules.

Purpose of the Study:

  • To determine if isolated aspen tissue grown in vitro produces antimicrobial substances.
  • To assess the spectrum of activity of these substances against various microorganisms.

Main Methods:

  • Isolated aspen tissue was cultured in vitro on agar medium for three weeks.
  • Culture plates were inoculated with a panel of microorganisms including fungi and bacteria.
  • Inhibitory zones were measured to assess antimicrobial activity.

Main Results:

  • Antimicrobial substances were successfully isolated from aspen tissue cultures.
  • Significant inhibitory zones were observed against Fusarium roseum, Saccharomyces cerevisiae, Bacillus subtilis, Bacillus cereus, Penicillium roqueforti, Torula utilis, Sarcina lutea, Flavobacterium aquatile, Pullularia pullulans, and Staphylococcus aureus.
  • The results indicate broad-spectrum antimicrobial activity.

Conclusions:

  • In vitro cultured aspen tissue yields potent antimicrobial substances.
  • These compounds demonstrate efficacy against a diverse range of pathogenic and non-pathogenic microorganisms.
  • Aspen tissue culture is a viable method for producing natural antimicrobial agents.

Related Concept Videos

Defenses Against Pathogens and Herbivores02:26

Defenses Against Pathogens and Herbivores

Plants present a rich source of nutrients for many organisms, making it a target for herbivores and infectious agents. Plants, though lacking a proper immune system, have developed an array of constitutive and inducible defenses to fend off these attacks.
Defense Mechanism Against Infection01:26

Defense Mechanism Against Infection

Natural flora, body system defenses, and inflammation are natural barriers of the body against infectious agents regardless of previous exposure. Normal floras of the human body refer to the microbial population that colonizes the skin and mucous membranes.
In addition, many body organ systems have unique defenses against infection. The skin is an intact, multilayered surface preventing invasion by microorganisms unless impaired. Mucous membranes lining the mouth, nose, and eyelids are barriers...
Surface Membrane Barriers01:18

Surface Membrane Barriers

The skin and mucous membranes serve as the primary line of defense against pathogens by providing both physical and chemical protection. These barriers are essential in preventing the entry and establishment of microbes, thereby maintaining the integrity of the host.
The outer layer of the skin, the epidermis, is a robust barrier comprising layers of closely packed keratinized cells. This dense arrangement prevents microbes from penetrating the body. The periodic shedding of epidermal cells...
Defense Against Bacterial Pathogens01:31

Defense Against Bacterial Pathogens

The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
Production of Antibiotics01:27

Production of Antibiotics

Penicillin, one of the earliest and most widely used antibiotics, is produced industrially by the filamentous fungus Penicillium chrysogenum. Large stirred-tank bioreactors ranging from tens to hundreds of thousands of liters maintain tightly controlled temperature, pH, and dissolved oxygen conditions to support fungal metabolism and maximize antibiotic yield. Penicillin is a secondary metabolite, synthesized primarily during the stationary growth phase, which requires a carefully managed...
iChip01:24

iChip

The cultivation of environmental microorganisms has long been hindered by the inability to replicate complex native conditions in vitro. The isolation chip (iChip) addresses this limitation by facilitating the growth of previously uncultivable microorganisms through in situ incubation. Designed for high-throughput microbial cultivation, the iChip comprises hundreds of microchambers, each capable of housing a single microbial cell. These microchambers are loaded with a mixture of molten agar and...