Table IV.

Effect of quinmerac on the contents of xanthophylls, xanthoxal, and ABA in G. aparine shoots

Treatmentβ-CaroteneAnthera-XanthinViolaxanthinNeoxanthinXanthoxalABA
nmol g−1 dry wt
Control886 ± 3561 ± 13683 ± 25496 ± 3110.5 ± 0.52.2 ± 0.2
Quinmerac822 ± 36 NS77 ± 4 NS663 ± 45 NS493 ± 35 NS15.5 ± 1.0127.2 ± 1.3

Plants at the third whorl stage were root-treated with 0.01 mm quinmerac hydroponically. After 48 h of incubation, pigments, xanthoxal, and ABA were extracted from shoot tissue and quantified (based on shoot dry wt.) as described in “Materials and Methods.” The data shown are means ± se of four replicates statistically analyzed using a t test. Means with NS are not significantly different to control at P < 0.01.