Table 2.
Seed oil physico-chemical attributes of two maize (Zea mays L.) cultivars as influenced by foliar-applied proline under water stress and non-stress conditions.
| Cultivar | Drought treatment | Treatments | Saponification value (mg of KOH g−1 of oil) | Un-saponifiable matter (%) | Iodine value (g of I 100g−1 of oil) | FFA (mg of KOH/g of oil) | Peroxide value (meq kg−1) | p-anisidine value | Dienes [ɛ1 cm(λ232 nm)] | Trienes [ɛ1 cm(λ268 nm)] |
|---|---|---|---|---|---|---|---|---|---|---|
| EV-1098 | Control | NS | 196.12 ± 10.78 a | 2.11 ± 0.23 d,e | 115.16 ± 5.53 a,b | 1.41 ± 0.08 c | 6.30 ± 0.56 f | 1.87 ± 0.057 f | 1.83 ± 0.005 b | 1.54 ± 0.009 e |
| WS | 193.93 ± 07.42 a,c | 2.25 ± 0.09 b,c,d | 114.37 ± 4.96 b | 1.42 ± 0.08 c | 6.41 ± 0.47 d | 1.89 ± 0.066 f | 1.79 ± 0.005 d | 1.64 ± 0.005 d | ||
| Pro | 201.67 ± 10.31 a | 1.97 ± 0.04 e | 121.56 ± 8.05 a | 1.29 ± 0.05 d | 5.58 ± 0.47 h | 2.12 ± 0.106 d,e | 1.63 ± 0.006 h | 1.63 ± 0.007 d | ||
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| Drought | NS | 178.55 ± 09.14 b | 2.35 ± 0.19 a,b | 115.34 ± 3.90 a,b | 1.70 ± 0.11 a,b | 7.60 ± 0.37 a | 2.14 ± 0.072 c,d,e | 1.71 ± 0.008 e | 1.81 ± 0.006 b | |
| WS | 179.74 ± 10.28 b | 2.28 ± 0.16 b,c | 112.95 ± 7.37 c | 1.76 ± 0.08 a | 7.56 ± 0.44 a | 2.14 ± 0.057 c,d | 1.69 ± 0.007 f | 1.68 ± 0.006 c | ||
| Pro | 188.08 ± 12.93 b,c | 2.14 ± 0.09 c | 121.86 ± 7.19 a | 1.48 ± 0.10 c | 6.34 ± 0.42 e,f | 2.24 ± 0.097 b,c | 1.60 ± 0.008 i | 1.55 ± 0.008 e | ||
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| Agaiti- 2002 | Control | NS | 191.07 ± 11.27 a | 2.11 ± 0.18 d,e | 113.49 ± 3.40 c | 1.35 ± 0.07 d | 6.15 ± 0.37 g | 2.09 ± 0.091 d,e | 1.88 ± 0.011 a | 1.68 ± 0.005 c |
| WS | 189.26 ± 11.50 b,c | 2.16 ± 0.15 c | 113.75 ± 4.28 c | 1.40 ± 0.06 c | 6.37 ± 0.43 d,e | 2.04 ± 0.189 e | 1.81 ± 0.009 c | 1.64 ± 0.005 d | ||
| Pro | 198.67 ± 07.27 a | 1.95 ± 0.11 e | 115.68 ± 5.28 a,b | 1.28 ± 0.04 d | 5.50 ± 0.56 i | 2.10 ± 0.068 d,e | 1.66 ± 0.011 g | 1.55 ± 0.004 e | ||
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| Drought | NS | 175.38 ± 11.03 b | 2.47 ± 0.14 a | 116.60 ± 5.41 a,b | 1.64 ± 0.08 b | 6.59 ± 0.39 c | 2.33 ± 0.091 a,b | 1.71 ± 0.009 e | 1.87 ± 0.006 a | |
| WS | 179.86 ± 03.80 b | 2.30 ± 0.11 b | 113.83 ± 6.29 c | 1.64 ± 0.08 b | 6.79 ± 0.29 b | 2.32 ± 0.040 a,b | 1.64 ± 0.009 h | 1.82 ± 0.010 b | ||
| Pro | 186.14 ± 10.24 b,c | 2.15 ± 0.15 c | 116.64 ± 7.55 a | 1.46 ± 0.08 c | 6.33 ± 0.57 e,f | 2.42 ± 0.070 a | 1.55 ± 0.008 j | 1.55 ± 0.005 e | ||
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| LSD at 5% | 11.07 | 0.16 | 6.62 | 0.09 | 0.05 | 0.01 | 0.10 | 0.01 | ||
Data are presented as means ± standard error. Means within the same column sharing the same superscript letters do not differ significantly at the 5% level. NS: No spray; WS: Water spray; Pro: 30 mM proline; FFA= Free fatty acids.