UV-B Radiation Impacts Shoot Tissue Pigment Composition in Allium fistulosum L. Cultigens
Table 4
Mean valuesa for the ratio of zeaxanthin + antheraxanthin to zeaxanthin + antheraxanthin + violaxanthin (Z + A/A + Z + V) and the ratio of chlorophyll a to chlorophyll b (chlorophyll a/chlorophyll b) in shoot tissues for Allium fistulosum L. cultigens grown under supplemental UV-B (313 nm) light [7.0 mol·m−2·s−2 (2.68 W·m−2); UV-B] or UV-filtered (control) light in a glasshouse in Knoxville, TN, USA (35°96′N Lat.).
Cultigen
Z + A/A + Z + V
Chlorophyll a/chlorophyll b
UV-B
Control
Pr >
UV-B
Control
Pr >
Deep Purple
0.48 ± 0.01
0.51 ± 0.19
ns
1.25 ± 0.90
1.50 ± 0.23
ns
Evergreen Hardy White
0.41 ± 0.06
0.41 ± 0.01
ns
1.15 ± 0.56
0.91 ± 0.16
ns
Feast
0.51 ± 0.16
0.65 ± 0.21
ns
2.14 ± 0.43
1.07 ± 0.63
P = 0.031
GA-C 76
0.49 ± 0.07
0.49 ± 0.10
ns
1.58 ± 0.18
0.93 ± 0.51
ns
Ishikura Improved F1
0.34 ± 0.03
0.40 ± 0.08
ns
1.69 ± 1.06
1.45 ± 0.70
ns
Improved Beltsville Bunching
0.41 ± 0.03
0.41 ± 0.07
ns
1.04 ± 0.92
1.29 ± 0.50
ns
Jionji Negi
0.46 ± 0.07
0.35 ± 0.15
ns
1.85 ± 0.70
2.21 ± 0.50
ns
Long White Bunching
0.52 ± 0.04
0.58 ± 0.17
ns
1.86 ± 0.06
2.25 ± 0.68
ns
Parade
0.45 ± 0.10
0.50 ± 0.24
ns
1.77 ± 0.33
2.16 ± 0.48
ns
Performer
0.66 ± 0.17
0.40 ± 0.02
ns
1.60 ± 0.11
2.07 ± 1.19
ns
Pesoenyj
0.44 ± 0.03
0.39 ± 0.01
P = 0.022
1.40 ± 0.42
1.95 ± 0.80
ns
Shounan
0.42 ± 0.03
0.40 ± 0.03
ns
1.78 ± 0.52
1.08 ± 0.53
ns
White Spear
0.50 ± 0.21
0.51 ± 0.22
ns
1.46 ± 0.42
1.08 ± 0.62
ns
Zhang Qui Da Cong
0.42 ± 0.05
0.41 ± 0.08
ns
1.11 ± 0.50
1.32 ± 0.46
ns
274254-05GI
0.36 ± 0.06
0.40 ± 0.00
ns
1.80 ± 0.71
2.14 ± 0.81
ns
G 30393-06GI
0.69 ± 0.20
0.55 ± 0.12
ns
1.84 ± 0.31
1.32 ± 0.64
ns
0.15
0.20
ns
0.96
aComposition of plant samples from 4 replications ± standard deviation. bSignificance based on paired Student’s t-test among treatments; ns: not significant. cLSD for differences between cultivar means .
