Effects of micronutrients on the growth form of two families of Pinus radiata (D.Don) seedlings |
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Authors: | Nigel D Turvey Clive Carlyle Geoffrey M Downes |
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Institution: | (1) Forestry Section, University of Melbourne, 3363 Creswick, Victoria, Australia;(2) Present address: CSIRO Division of Forest Research, 5290 Mount Gambier, South Australia, Australia |
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Abstract: | Micro-element deficiencies have been implicated in the development of poor stem form in Pinus radiata plantations. Cu, Mn and B have been implicated in previous studies as influencing tree form and/or the process of lignification in plants. Therefore an experiment was initiated to examine the individual and interactive effects exhibited by these trace elements on stem form and lignification.The investigation showed that Cu deficiency reduced both lignification and stem form in seedlings. Mn, competing with Cu for uptake, enhanced the symptoms of Cu deficiency. Boron addition did not alleviate the expression of deformity or increase levels of lignification. There was a clear family influence on the development of seedling stem form in response to variations in mineral nutrition. |
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Keywords: | boron copper lignin manganese Pinus radiata stem deformity Toorour syndrome |
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