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Electronic Journal of Biotechnology ISSN: 0717-3458
  © 2010 by Universidad Católica de Valparaíso -- Chile
Vol. 13 No. 1, Issue of January 15, 2010
 


Table 1. Morphological characteristics of four E. globulus genotypes subjected to three drought hardening regimes in nursery. Height, collar diameter, leaf area, specific leaf area, stem and leaf biomass in four Eucalyptus globulus genotypes (EG-13, EG-23, EG-22 and EG-14) subjected to three different regimes of drought hardening (-0.2, -1.8 and -2.6 MPa) evaluated at the end of the experiment (Day 54). Values are means ± 1 SE (n = 160 for hardening regime and n = 120 per genotype). Means with different letters indicate significant differences (P ≤ 0.05).



Morphological

Hardening regime (MPa)

Genotype

characteristic

-0.2

-1.8

-2.6

EG-13

EG-23

EG-22

EG-14

Height (cm)

23.4 ± 0.36 a

22.6 ± 0.29 ab

21.8 ± 0.28 b

22.9 ± 0.32 a

22.4 ± 0.26 ab

23.6 ± 0.41 a

21.5 ± 0.38 b

Collar diameter (mm)

2.34 ± 0.04 a

2.34 ± 0.04a

2.25 ± 0.04 a

2.26 ± 0.04 a

2.27 ± 0.06 a

2.34 ± 0.03 a

2.36 ± 0.04 a

Leaf area (cm2)

66.3 ± 1.3 a

44.9 ± 1.4 b

37.3 ± 1.2 c

51.3 ± 3.2 a

41.3 ± 2.7 b

53.0 ± 2.6 a

52.3 ± 2.6 a

Specific leaf area (cm2/g)

105 ± 1.6 a

97 ± 1.4 b

90 ± 1.5 c

98 ± 2.0 ab

93 ± 2.1 b

99 ± 1.9 ab

100 ± 2.4 a

Stem biomass (g)

0.65 ± 0.02 a

0.49 ± 0.02 b

0.43 ± 0.01 c

0.51 ± 0.03 bc

0.54 ± 0.03 ab

0.57 ± 0.02 a

0.47 ± 0.02 c

Leaf biomass (g)

0.63 ± 0.02 a

0.46 ± 0.02 b

0.42 ± 0.02 b

0.52 ± 0.03 a

0.45 ± 0.03 b

0.53 ± 0.02 a

0.53 ± 0.03 a

 


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