Benzyladenine pulsing retards leaf yellowing and improves quality of goldenrod (Solidago canadensis) cut flowers
Sonia Philosoph-Hadas, Rina Michaeli, Yael Reuveni and Shimon Meir
Postharvest Biology and Technology Vol: 9 Issue: 1 Pages: 65-73
1996
บทคัดย่อ
In order to retard early leaf yellowing in flowering shoots of goldenrod (Solidago
canadensis cv. `Yellow Submarine') while preserving overall quality, the
effects of silver thiosulphate (STS), naphthalene acetic acid (NAA),
gibberellin (GA3) and benzyladenine (BA) were investigated. Except
for BA, which was applied by spraying, all compounds were applied by pulsing
with an aqueous solution for 19 h. STS and BA both considerably delayed leaf
yellowing in cut spikes during vase life, and the former treatment also
inhibited flower senescence; combining STS and BA was beneficial to both leaf
and flower survival. However, since BA was inefficient as a pulsing treatment,
commercial formulations containing the same active ingredient that did not have
this disadvantage, were examined. The product TOG-L-101 containing BA was
particularly effective in postponing the senescence of both leaves and flowers,
and the addition of STS gave no further advantage. A range of concentrations
suggested that the equivalent of 45 
M
BA was optimal for both leaves and spikes even after simulated transport (dry
storage for 2 days at 6°C). TOG-L-101 is thus a nonhazardous and effective
substitute for STS, and can be introduced intoS. canadensis by normal
pulse treatment, which in those circumstances can preserve the quality of these
cut flowers at the consumer level.