Antimicrobial Compounds from Leaf Extracts of Jatropha curcas, Psidium guajava, and Andrographis paniculata

Table 4

Vase life of cut Mokara Red orchid flower and pH (final) of the flower preservative solutions as affected by Jatropha curcas, Psidium guajava, and Andrographis paniculata leaf extracts, tap water, and 8-hydroxyquinoline citrate (8-HQC).

Treatment	Concentration (mg/L)	Vase life (day)	pH
Tap water (control)	—	4.26 ± 0.26e^z	8.70 ± 0.03a
8-HQC (control)	125	8.61 ± 0.11a	4.04 ± 0.01g
J. curcas	5	4.18 ± 0.16e	8.03 ± 0.02b
	10	5.07 ± 0.20d	7.47 ± 0.02c
	15	5.63 ± 0.19cd	6.35 ± 0.03e
	20	3.59 ± 0.21f	8.64 ± 0.04a
P. guajava	5	4.43 ± 0.20e	7.04 ± 0.04d
	10	5.35 ± 0.20d	6.60 ± 0.03e
	15	6.38 ± 0.21b	5.73 ± 0.02f
	20	3.98 ± 0.21ef	7.60 ± 0.03c
A. paniculata	5	4.30 ± 0.30e	7.32 ± 0.02cd
	10	5.14 ± 0.32d	6.65 ± 0.02e
	15	6.02 ± 0.30bc	5.84 ± 0.03f
	20	3.91 ± 0.34ef	7.70 ± 0.04bc

2% sucrose and 3% citric acid were added to each flower preservative solution.
Vase life ended when 30% of flowers appeared unattractive due to bud that remains closed and wilted, petal discoloration and wilting, floret epinasty and drop, and stem yellowing. Data are means ± SE; .
^zMeans followed by the same letter within each column are not significantly different by DMRT ().