Table II.

Carotenoid content of leaves of varieties IR72 and IR65600-42-5-2 (NPT) in LL, ML, and HL conditions (10%, 40%, and 100% of full sunlight, respectively)

Variety and Growth ConditionLuteinNeoxanthinβ -CaroteneXCRatio of Total Carotenoid to Total Chlorophyll
IR72
 HL32.4 ±  0.3712.58 ±  0.1529.15 ±  0.4228.81 ±  1.940.512 ±  0.012
 ML37.91 ±  0.3214.17 ±  0.1528.56 ±  0.2718.41 ±  0.780.443 ±  0.008
 LL40.41 ±  0.9015.07 ±  0.1526.91 ±  0.4217.61 ±  0.010.395 ±  0.005
NPT
 HL32.03 ±  0.4112.58 ±  0.1528.75 ±  0.4526.23 ±  1.250.474 ±  0.015
 ML33.49 ±  1.9513.91 ±  0.5630.12 ±  1.1322.98 ±  0.950.481 ±  0.020
 LL36.08 ±  1.1014.67 ±  0.5228.03 ±  0.7919.93 ±  0.770.437 ±  0.014

Lutein, neoxanthin, and β -carotene levels are expressed as percentage of total carotenoid. Xanthophyll cycle (XC) content is expressed as percentage of total carotenoid content. Means ±se, n = 5.