. 2019 Feb 12;25(3):727–740. doi: 10.1007/s12298-019-00646-8

Table 2.

Total chlorophyll and carotenoid content in thirteen rice varieties after exposure to various doses of UV-B (7, 14, 21 and 28 kJ m⁻²d⁻¹)

UV-B (kJ m⁻²d⁻¹)	Aathira	Mangalamahsuri	Kanchana	Jyothi	Annapoorna	Mattatriveni	Karuna
Total chlorophyll content (mg/g DW)
Control	14.24 ± 1.67^a	7.24 ± 1.04^a	12.77 ± 0.37^b	5.99 ± 0.31^ab	4.82 ± 0.31^b	10.79 ± 0.63^c	7.61 ± 0.18^a
7	12.85 ± 2.19^ab	5.36 ± 0.85^ab	14.09 ± 1.15^a	6.30 ± 0.15^a	5.85 ± 0.27^a	9.71 ± 0.30^b	6.30 ± 0.14^b
14	11.74 ± 0.52^ab	6.01 ± 0.86^ab	12.60 ± 0.69^b	5.41 ± 0.46^b	4.81 ± 0.18^b	8.91 ± 0.55^b	5.35 ± 0.08^c
21	10.69 ± 1.76^b	6.02 ± 0.29^b	11.22 ± 0.54^c	5.41 ± 0.48^b	4.63 ± 0.22^b	7.25 ± 0.61^a	4.95 ± 0.53^cd
28	11.05 ± 0.53^b	5.76 ± 0.18^b	10.23 ± 0.52^c	5.28 ± 0.43^b	4.61 ± 0.71^b	7.57 ± 0.30^a	4.62 ± 0.43^d
Total carotenoid content (mg/g DW)
Control	0.65 ± 0.04^e	0.40 ± 0.05^c	0.77 ± 0.03^d	0.47 ± 0.04^c	0.53 ± 0.02^d	0.41 ± 0.08^ab	2.37 ± 0.06^c
7	0.95 ± 0.05^d	0.52 ± 0.06^c	1.20 ± 0.14^c	0.48 ± 0.07^c	0.54 ± 0.01^d	0.40 ± 0.11^b	2.64 ± 0.13^b
14	1.37 ± 0.25^c	1.13 ± 0.07^b	1.12 ± 0.09^c	0.87 ± 0.12^b	0.85 ± 0.06^c	0.52 ± 0.04^ab	2.55 ± 0.01^b
21	2.58 ± 0.16^b	2.10 ± 0.58^a	1.45 ± 0.14^b	1.40 ± 0.11^a	1.15 ± 0.07^b	0.52 ± 0.06^ab	2.94 ± 0.04^a
28	2.95 ± 0.07^a	2.43 ± 0.39^a	2.06 ± 0.16^a	0.80 ± 0.16^b	2.48 ± 0.06^a	0.30 ± 0.01^a	3.07 ± 0.13^a

UV-B (kJ m⁻²d⁻¹)	Harsha	Varsha	Neeraja	Swetha	Aiswarya	Swarnaprabha
Total chlorophyll content (mg/g DW)
Control	10.69 ± 0.72^a	6.75 ± 0.60^a	9.23 ± 0.89^a	12.75 ± 1.07^a	13.51 ± 1.17^a	19.80 ± 0.56^a
7	10.69 ± 1.50^a	4.66 ± 0.29^b	7.35 ± 0.63^b	7.60 ± 0.86^b	7.50 ± 0.77^b	15.29 ± 1.18^b
14	8.05 ± 0.34^b	2.78 ± 0.23^c	5.46 ± 0.29^c	5.43 ± 0.91^c	4.75 ± 0.20^c	7.77 ± 0.58^c
21	4.68 ± 0.31^c	2.75 ± 0.72^c	1.75 ± 0.15^e	3.04 ± 0.56^d	1.42 ± 0.47^d	7.10 ± 0.58^c
28	4.19 ± 0.18^c	2.53 ± 0.44^c	3.68 ± 0.37^d	6.39 ± 0.40^bc	1.48 ± 0.32^d	4.04 ± 0.70^d
Total carotenoid content (mg/g DW)
Control	4.44 ± 0.19^c	0.82 ± 0.07^b	1.40 ± 0.07^c	2.41 ± 0.10^a	2.31 ± 0.28^ab	1.20 ± 0.15^a
7	4.42 ± 0.13^c	1.18 ± 0.08^a	1.43 ± 0.04^c	2.55 ± 0.19^a	2.54 ± 0.00^a	1.26 ± 0.05^a
14	4.66 ± 0.01^bc	1.22 ± 0.12^a	1.51 ± 0.03^ab	2.62 ± 0.56^a	2.54 ± 0.00^a	1.33 ± 0.03^a
21	4.96 ± 0.07^b	1.10 ± 0.11^a	1.55 ± 0.04^a	1.55 ± 0.10^b	2.24 ± 0.10^ab	0.83 ± 0.13^b
28	6.44 ± 0.48^a	1.24 ± 0.07^a	1.44 ± 0.01^bc	1.70 ± 0.16^b	1.99 ± 0.25^b	0.41 ± 0.12^c

The data represent mean ± standard error (SE) and the values is an average of recordings from three independent experiments, each with three replicates (i.e. n = 9). Different alphabetical letters indicate statistically significant differences at p ≤ 0.05. Values followed by the same letter in a column indicate no significant difference between treatments following Tukey’s studentized range (HSD) test