How does microbial activity negatively affect cut flowers?

Microbial activity negatively affects cut flowers primarily by causing plugging of the stem. When bacteria and fungi proliferate in the water or on the stems of cut flowers, they can create a biofilm or slime that obstructs the vascular system of the flowers. This blockage prevents the flowers from effectively taking up water and nutrients, leading to premature wilting and a decrease in overall longevity.

The presence of these microorganisms can also lead to the production of harmful substances that can further impede water movement. Therefore, managing microbial activity in the environment of cut flowers is crucial to maintaining their freshness and vitality.