Carbon isotope discrimination and oxygen isotope composition in clones of the F1 hybrid between slash pine and Caribbean pine in relation to tree growth, water-use efficiency and foliar nutrient concentration

Xu, Z. H., Saffigna, P. G., Farquhar, G. D., Simon, J. A., Haines, R. J., Walker, D. O., Osbourne, D. O. and Guinto, D. (2000) Carbon isotope discrimination and oxygen isotope composition in clones of the F1 hybrid between slash pine and Caribbean pine in relation to tree growth, water-use efficiency and foliar nutrient concentration. Tree Physiology, 20 18: 1209-1217. doi:10.1093/treephys/20.18.1209


Author Xu, Z. H.
Saffigna, P. G.
Farquhar, G. D.
Simon, J. A.
Haines, R. J.
Walker, D. O.
Osbourne, D. O.
Guinto, D.
Title Carbon isotope discrimination and oxygen isotope composition in clones of the F1 hybrid between slash pine and Caribbean pine in relation to tree growth, water-use efficiency and foliar nutrient concentration
Journal name Tree Physiology   Check publisher's open access policy
ISSN 0829-318X
Publication date 2000-01-01
Sub-type Article (original research)
DOI 10.1093/treephys/20.18.1209
Open Access Status Not Open Access
Volume 20
Issue 18
Start page 1209
End page 1217
Total pages 9
Place of publication Canada
Publisher Heron Publishing, Victoria, Canada
Language eng
Subject C1
620302 Softwood plantations
300604 Management and Environment
Abstract The objectives of this study were: (1) to examine how foliar carbon isotope discrimination ({Delta}) and oxygen isotope composition ({delta}18O) are related to tree growth, ash mineral nutrient concentration and foliar nutrient concentration in 7-year-old clones of the F1 hybrid between slash pine (Pinus elliottii Engelm.) and Caribbean pine (P. caribaea var. hondurensis Barr. et Golf.) in subtropical Australia; and (2) to evaluate the potential of using foliar {Delta}, ash mineral nutrient concentration and {delta}18O measurements for selecting F1 hybrid pine clones with high water-use efficiency (WUE) and growth potential. There were significant differences in tree growth, foliar {Delta}, {delta}18O and ash mineral nutrient concentration among the eight clones tested. Significant negative linear relationships existed between tree growth and {Delta}, extrapolating to zero growth at {Delta} = 24–30{per thousand}. There were strong genetic correlations (r = –0.83 to –0.96) between {Delta} and tree growth, particularly tree height. Significant non-genetic correlations (r = –0.62 to –0.80) existed between {Delta} and foliar K concentration. Foliar {delta}18O, ash mineral nutrient concentration and foliar nutrient concentration were unrelated to tree growth. In the F1 hybrid pine clones, variation in tree WUE, as reflected by {Delta}, was largely attributed to a genetic effect on leaf photosynthetic capacity rather than on stomatal conductance, as reflected by foliar {delta}18O.
Keyword ash mineral nutrient concentration
foliar K concentration
growth performance
photosynthetic capacity
Pinus caribaea
Pinus elliottii
selection
stomatal conductance
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Agriculture and Food Sciences
 
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Created: Tue, 10 Jun 2008, 22:38:38 EST