Table 1 Biomass under different N supplementation conditions in three genotypes of C. quinoa.

From: Nitrogen physiology of contrasting genotypes of Chenopodium quinoa Willd. (Amaranthaceae)

Genotype

LAi (cm2)

SLA (cm2/g)

Total leaves weight (g)

Root (g)

Shoot (g)

Shoot/root

Faro

HN

67 ± 8 (a)

145 ± 9 (c)

32 ± 4 (a)

17 ± 6 (a)

86 ± 7 (ab)

7 ± 2 (bc)

LN

66 ± 6 (a)

166 ± 13 (c)

27 ± 4 (a)

8 ± 2 (b)

69 ± 12 (b)

10 ± 2 (bc)

UdeC9

HN

63 ± 2 (a)

174 ± 9 (c)

31 ± 4 (a)

11 ± 3 (ab)

78 ± 7 (ab)

8 ± 2 (bc)

LN

41 ± 5 (b)

171 ± 9 (c)

16 ± 2 (bc)

3.7 ± 0.5 (c)

45 ± 4 (c)

12 ± 1 (b)

BO78

HN

35 ± 3 (b)

277 ± 13 (a)

23 ± 2 (ab)

18 ± 4 (a)

92 ± 4 (a)

6 ± 1 (c)

LN

19 ± 2 (c)

224 ± 15 (b)

8 ± 1 (c)

1.9 ± 0.3 (c)

39 ± 1 (c)

21 ± 3 (a)

G

<0.05

<0.05

n.s.

n.s.

<0.05

n.s

N

<0.001

n.s

<0.001

<0.001

<0.001

<0.05

G*N

n.s

n.s

n.s

n.s

n.s

n.s

  1. Different parameters were determined to evaluate biomass changes associated with different N supplied. Fully expanded third leaves (from the top part of the plant) were used for individual leaf area measurements (LAi, cm2) and ratio of leaf area to dry mass (SLA, cm2/g) was also determined. Biomass of four different individuals (n = 4) are expressed as dry weight (DW). Different letters represent significant differences between genotypes (G; Faro, UdeC9 and BO78) and nitrogen supplementation (N; HN (high nitrogen) and LN (low nitrogen)) (P < 0.05) using two-way ANOVA. Shoot: root ratio was calculated for every single plant. The three last rows of the table show the significance levels (P) and interactions of the factors (G, N and G*N) for the parameters. n.s. = no significant.
Back to article page