Table 1.
Seed composition and nitrogen harvest index of Aviso and Oase under ample or low N supply
| Aviso | Oase | ||||
|---|---|---|---|---|---|
| HN | LN | HN | LN | ||
| Yield components | C:N ratio | 11.31 ± 0.19 | 14.29 ± 1,01* | 11.19 ± 0.25 | 18.36 ± 0.70**# |
| Seed N amount (mg) | 421.48 ± 40.08 | 194.36 ± 8.05** | 432.84 ± 5.93 | 168.22 ± 7.77**# | |
| N Harvesting Index (NHI) | 63.69 ± 3.33 | 72.05 ± 2.14 | 65.01 ± 1.24 | 73.97 ± 1.68* | |
| Seed composition | Proteins (%) | 32.20 ± 0.39 | 25.83 ± 1.20* | 31.68 ± 1.87 | 19.48 ± 0.77*# |
| Fatty acids (%) | 33.99 ± 1.31 | 38.32 ± 1.45* | 30.10 ± 4.27 | 44.37 ± 1.75*# | |
| C18:1 (oleic; %) | 53.13 ± 0.46 | 55.86 ± 0.8 | 58.76 ± 3.13 | 64.61 ± 1.08*# | |
| C18:2 (linolenic ω6; %) | 21.91 ± 0.34 | 21.43 ± 0.33 | 15.34 ± 0.40# | 17.29 ± 0.29*# | |
| C18:3 (linoleic ω3; %) | 11.53 ± 0.19 | 10.91 ± .022 | 8.05 ± 0.59# | 7.56 ± 0.29# | |
| C22:1 (erucic; %) | 2.13 ± 0.13 | 8.26 ± 0.83* | 3.57 ± 2.39 | 4.28 ± 2.19# | |
The plants were supplied with an ample (HN, 3.75 mM) or low (LN, 0.375 mM) nitrate concentration. The N amount in seed is estimated in milligrams. C: N ratio: ratio C: N in seeds; NHI: N Harvesting Index (mg N in seeds per mg N in shoot). The seed composition (percentage of proteins and fatty acids) and the oil composition (percentage in oleic, linolenic, linoleic and erucic acids) was determined by NIRS method. Asterisks represent significant differences between N treatments and hashes represent significant differences between the two genotypes (n = 4 plants; #,*= p < 0.05; **= p < 0.01).