Physiological responses in Macadamia integrifolia on exposure to manganese treatment
DR Fernando, AJM Baker, IE Woodrow
AUSTRALIAN JOURNAL OF BOTANY | CSIRO PUBLISHING | Published : 2009
Macadamia integrifolia Maiden Betche (Proteaceae) from eastern Australia is farmed for its edible nuts and is capable of accumulating high foliar concentrations of manganese (Mn). It was investigated here in a pot trial, where a range of physiological responses to Mn treatment were measured. Although Mn uptake was initially slow, final foliar concentrations increased linearly with treatment levels. The highest observed mean foliar concentration of Mn was 7900gg-1 dry weight (dwt). No negative effect of Mn accumulation on plant growth was apparent, even at the highest treatment concentration. Two groups of plants, each exposed to either full sunlight or part shade were identically treated wit..View full abstract
The authors thank Craig Hardner (CSIRO Plant Industry, Brisbane) and Ian McConnachie (Australian Macadamia Association) for providing Macadamia seed stocks, Jason Goodger and Liz Nielson for their guidance with the organic assays, and Nick Uren for advice on setting up the pot trial. This manuscript was prepared with the financial support of the David Hay Memorial Fund (University of Melbourne, Australia).