Table 1.

HPLC analysis of carotenoid profile (expressed in relative %)^a of D. bardawil in different treatments under light intensity of 35.0 ± 2.5 μmol m⁻² s⁻¹(LL) and 75.0 ± 2.5 μmol m⁻²(HL)

Treatment	lutein	β carotein		Unknown
(HL)	(RT- 4)	(RT- 22)	(RT- 2.3)	(RT- 3.2)	(RT- 7.7)
Control	20.8 cd	39.3 cd	5.1 d	22.9 a	11.9*a
DPA	22.4 cd	70.0*a	5.4 d	1.5 c	0.5 cd
Caffeine	24.8 cd	41.0 b	29.3 cd	0.9 c	3.8 c
Nicotine	1.9 d	19.1 c	67.4*a	0.9 c	10.5 bc
Glyphosate	51.3*a	22.7 c	12.9 c	12.4 b	0.5 cd
DCMU	42.0 bc	18.3 c	11.8 d	24.4*a	3.3 c
Basta	15.4 c	69.0 bc	13.3 c	1.6 c	0.5 cd
(LL)
Control	19.5 c	35.8 b	24.2*c	5.3 c	15.1*a
DPA	22.3 b	61.0*a	5.4 d	6.4 c	5.1 c
Caffeine	14.4 c	51.0 bc	17.3 c	10.9 b	6.3 c
Nicotine	1.9 d	17.1 c	60.4a	20.1 bc	0.4 dc
Glyphosate	42.7*a	31.3 cd	13.0 c	0.0 dc	12.9 bc
DCMU	38.3 bc	11.0 d	18.0 d	24.46*a	8.3 b
Basta	15.0 c	59.0 bc	11.0 d	1.6 dc	13.3 bc

^a Values are mean relative area (%) of HPLC chromatograms for three consecutive analyses.

Different alphabets in the same column represent *significant difference between the means

P ≤ 0.05. RT (retention time) at 4th and 22 nd min represent lutein, β carotein respectively, RT at 2.3, 3.2, 7.7 min represent unknown peaks.