Source-sink manipulation of Camelina sativa L. related to grain yield under stressful environment of Hokkaido, Japan

Figures & data

Figure 1 Grain yield in camelina (Camelina sativa L.) genotypes grown at different nitrogen (N) rates. Dark and light gray indicate 30 kg N ha⁻¹ and 130 kg N ha⁻¹, respectively. Bars in the graph indicate standard deviation (SD) in the different N levels. Camelina sativa genotypes are denoted as follows: (1) Celine, (2) Calena, (3) CG3X-40, (4) CA4X-4, (5) CA9X-21.

Table 1 Content of fatty acids in oil of Camelina (Camelina sativa L.) seed (percent of fatty acid) as affected by nitrogen (N) rates (means ± standard error)

N rate (kg N ha^−1)
Fatty acid	30	130
16:0	5.58 ± 0.06	5.59 ± 0.06
18:0	2.76 ± 0.01	2.68 ± 0.05
18:1n-9	12.16 ± 0.37	11.72 ± 0.47
18:2n-6	18.47 ± 0.44	18.57 ± 0.21
18:3n-3	31.21 ± 0.86	31.39 ± 0.35
20: 1n-9	15.32 ± 0.01	15.31 ± 0.10
22: 1n-9	4.54 ± 0.32	4.73 ± 0.19

Palmitic acid (16:0), stearic acid (18:0), oleic acid (18:In-9), linoleic acid (18:2n-6), α-linolenic acid (18:3n-3), gondoic acid (20:In-9) and erucic acid (22:In-9).

Figure 2 Plant biomass in a Camelina (Camelina sativa L.) genotype as affected by defoliation and shading. Treatment was applied at flowering and measurement was made at maturity.

Figure 3 Relationship between grain number and grain yield in Camelina sativa L.

Table 2 Effect of defoliation and shading on grain yield and yield components in Camelina sativa L.

Treatment	Grain yield g plant^−1	Grain no. plant^−1	1000-grain g	Pod no. plant^−1	Grain no. pod^−1
Control	1.60 ± 0.98	1746 ± 982	0.906 ± 0.084	183 ± 75	8.8 ± 1.4
All leaves	1.13 ± 0.68	1347 ± 860	0.802 ± 0.147	114 ± 60	12.2 ± 3.6
Lower L	1.69 ± 0.3	2023 ± 212	0.825 ± 0.126	135 ± 2	10.8 ± 5.3
Shading I	0.41 ± 0.12	645 ± 194	0.825 ± 0.126	52 ± 17	12.6 ± 1.4
Shading II	0.74 ± 0.31	1036 ± 413	0.709 ± 0.107	77 ± 31	12.7 ± 3.0

All leaves: removal of all leaves; and Lower L: removal of lower leaves on the main stem. Shading I and II indicate the light transmission ratio at the ground level at 6 and 33%, respectively (means ± standard error).

Figure 4 Relationship between pod number and grains per pod in Camelina sativa L.