Fungal and bacterial contamination is one of the most important problems in plant tissue culture. Once microorganisms enter a culture vessel, they can compete with plant tissues for sugars and nutrients, alter the culture medium, suppress growth, and eventually cause the entire vessel to fail. Visual inspection is useful for preliminary screening, but it should not be used to identify a microorganism with certainty. Bacteria, filamentous fungi, and yeasts can sometimes produce very similar...

Subculturing is a normal and necessary part of plant tissue culture. Plantlets need fresh medium, additional space for multiplication, and regular transfer to prevent nutrient depletion and the accumulation of metabolic waste inside the culture vessel. However, subculturing too frequently or maintaining the same culture line through too many passages can create problems. It is important to distinguish between subculturing too soon within each production cycle and continuing the same culture...

Flowering inside a tissue culture vessel is a real and well-documented phenomenon known as in vitro flowering or in vitro floral induction. It occurs when a plantlet or shoot that is initially growing vegetatively shifts into the reproductive phase and begins producing an inflorescence or flowers under sterile culture conditions. This does not automatically mean that the plant has mutated, the vessel is contaminated, or the culture medium is incorrect. In vitro flowering usually results from...