Aluminum sensitivity and optimum Ca and pH requirement of teak (Tectona grandis Linn. f.) clones used for forestry plantations in Australia

Wehr, J. Bernhard, Smith, Tim, Blamey, Pax and Menzies, Neal (2010). Aluminum sensitivity and optimum Ca and pH requirement of teak (Tectona grandis Linn. f.) clones used for forestry plantations in Australia. In: R. J. Gilkes and N. Prakongep, Proceedings of the 19th World Congress of Soil Science; Soil Solutions for a Changing World. 19th World Congress of Soil Science, Brisbane, Qld, Australia, (18-21). 1-6 August, 2010.

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Author Wehr, J. Bernhard
Smith, Tim
Blamey, Pax
Menzies, Neal
Title of paper Aluminum sensitivity and optimum Ca and pH requirement of teak (Tectona grandis Linn. f.) clones used for forestry plantations in Australia
Conference name 19th World Congress of Soil Science
Conference location Brisbane, Qld, Australia
Conference dates 1-6 August, 2010
Proceedings title Proceedings of the 19th World Congress of Soil Science; Soil Solutions for a Changing World
Place of Publication Australia
Publisher International Union of Soil Science
Publication Year 2010
Year available 2010
Sub-type Fully published paper
ISBN 9780646537832
Editor R. J. Gilkes
N. Prakongep
Volume Published on DVD
Issue Symposium 3.3.1.
Start page 18
End page 21
Total pages 4
Collection year 2011
Language eng
Abstract/Summary Teak is adapted to grow in tropical and subtropical regions and is considered to require fertile soils. Despite this, teak is often planted in soils that are highly leached, acidic and potentially Al-toxic. In Australia, several clones are commonly used for teak plantations and the aim of this study was to determine the optimum pH, Ca requirement and Al sensitivity of these clones. Biomass increase of nutrient solution-grown teak plants was used to determine the optimum pH and Ca. There were no significant differences in optimum pH and Ca between clones and, overall, the greatest growth was obtained with nutrient solutions containing 1 mM Ca and adjusted to pH 6. Teak plants still grew at pH 4, but developed foliar Ca deficiency symptoms at 0.1 mM Ca. The Al sensitivity was determined by staining excised roots with chromeazurol S, eriochrome R and hematoxylin. Roots of plants exposed to 50 and 300 AM Al for 1-7 days gave a strong reaction with hematoxylin, and chromeazurol S, but a weak response to eriochrome cyanine R. The greatest resistance to low pH and Al was observed in the two clones E and H.
Keyword Al toxicity
Ca deficiency
Clonal differences
Root morphology
Roots
Staining
Q-Index Code E1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Conference Paper
Collections: Official 2011 Collection
School of Agriculture and Food Sciences
 
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Created: Tue, 30 Nov 2010, 09:11:50 EST by Dr Johannes Wehr on behalf of School of Land, Crop and Food Sciences