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Field Measurements of Net Photosynthesis and Related Parameters in Four Provenances of Acacia auriculiformis

Cole, Stephen P., Woo, K. C., Eamus, Derek, Harwood, C. E. and Haines, M. W. (1994). Field Measurements of Net Photosynthesis and Related Parameters in Four Provenances of Acacia auriculiformis. Australian Journal of Botany,42(4):457-470.

Document type: Journal Article
Citation counts: Scopus Citation Count Cited 14 times in Scopus Article | Citations

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Title Field Measurements of Net Photosynthesis and Related Parameters in Four Provenances of Acacia auriculiformis
Author Cole, Stephen P.
Woo, K. C.
Eamus, Derek
Harwood, C. E.
Haines, M. W.
Journal Name Australian Journal of Botany
Publication Date 1994
Volume Number 42
Issue Number 4
ISSN 0067-1924   (check CDU catalogue open catalogue search in new window)
Scopus ID 2-s2.0-0028003005
Start Page 457
End Page 470
Total Pages 14
Place of Publication Australia
Publisher C S I R O Publishing
Field of Research 270400 Botany
Abstract Tree diameter at breast height (DBH), tree height, maximum light saturated assimilation (Amax), phyllode conductance (gs), and phyllode water potential (ΨW) were determined in trees of Acacia auriculiformis A. Cunn. ex Benth., 3-4 years old. Trees from three provenance regions were studied: from Papua New Guinea (PNG ̵1 Bensbach River and Morehead River provenances); north Queensland (NQ); and the Northern Territory (NT), as part of a provenance trial on Melville Island, Northern Territory. The PNG provenances were the largest trees and had accumulated the largest biomass.

Significant variation in Amax between provenance regions within a season, and between seasons (wet vs dry) for each provenance region were observed. There was no correlation between seasonal Amax and provenance region growth rate. The NT provenance region generally exhibited the largest Amax and the least variation between seasons and the PNG provenance region the lowest Amax, while the NQ provenance region varied most between seasons. Seasonal and provenance region Variation in gs followed a similar trend to Amax. There was no significant variation in ΨW between provenance regions. Canopy area of the PNG provenances was seven times greater than that of the NT provenance during the late dry season. We conclude that PNG provenances achieve their larger growth rates primarily by maintaining a larger canopy. Results are discussed with reference to the observed superior growth rate of the PNG provenances, and highlight the need for caution in extrapolating single phyllode assimilation data to infer comparative growth rates.
DOI http://dx.doi.org/10.1071/BT9940457   (check subscription with CDU E-Gateway service for CDU Staff and Students  check subscription with CDU E-Gateway in new window)
 
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Created: Fri, 29 Aug 2014, 20:23:53 CST by Anthony Hornby