Inoculation with all the strains caused increase in number of ray florets
of flowers in treated plants as compared to the non-inoculated control treatment except the isolate Bacillus sp.
The achenes of the ray florets
, which possess markedly incurved corky margins (Fig.
In the second mutation, which results in the tubular florets, the insertion of a "jumping gene" disrupts the ability of the plant to produce normal ray florets
. As a result, tubular florets are produced in place of the normal ray florets
The showier outer ray florets
contain only female parts.
Collerette dahlias have a single row of outer ray florets
which form a disc.
The shape of the petals (called ray florets
) determines the flower formation.
They are members of the Compositae or Sunflower family with a central head composed of many tubular florets surrounded by ray florets
with showy, strap-like petals.