Dr Michael Treeby
Sub-Program Leader
Horticultural Systems Research Program
CSIRO Plant Industry
Merbein Victoria 3505
Email: Michael.Treeby@csiro.au
To enhance control over crop productivity and product quality by manipulating crop nutrition, to improve nutrient use efficiency of grapevines and citrus; and to use modeling techniques to develop improved management support frameworks for incorporation into advanced decision support packages.
The Big Question
The economic sustainability of the grape and citrus industries is dependent on not only control over productivity, but also on composition. Controlling composition by managing nutrient supply is another means of manipulating fruit quality. Understanding the physiology of mineral nutrient accumulation by whole vines and trees and grape berries and citrus fruit will enable the development of nutrient supply regimes to better control production and composition. Modeling approaches allow identification of gaps in knowledge, enabling better crop management decisions by industry and provide support in education and training.
The Short-term goals
Grapevines
- N supply effects on Sultana berry composition and non-enzymic darkening of dried vine fruit during storage quantified
- Develop N supply framework for highly productive dried vine fruit vineyards
- Identify factors leading to berry collapse in table grapes
Citrus
- Assess impact of cultural practices (mineral nutrient supply and irrigation) on postharvest performance of navel orange rinds
- Develop means of estimating physiological age of navel orange rinds
- Describe development steps leading to postharvest rind breakdown
| Group (lab) Members and areas of research
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- Michael Treeby: Grapevine and citrus mineral nutrition, fruit development and quality, cultural impacts, spatial variability, modeling
- Richard Storey: Salinity tolerance mechanisms, mineral element distribution, gene expression
- Katina Lindhout: Physiology of postharvest breakdown of navel oranges rind
Current:
- Horticulture Australia Ltd
- Victoria and Murray Valley Wine Grape Committee
Applications submitted or planned
- Horticulture Australia Ltd
- Australian Research Council
- Grape and Wine Research and Development Corporation
| Techniques in the Laboratory
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Currently active
- X-ray microprobe analysis
- Light microscopy
- Fourier transform infra-red spectroscopy
- ICP
- Chemometrics
In development
- Subtractive hybridisation
- Crop nutrition
- Fruit quality
- Stress responses
Top three areas of knowledge
Top three technical skills
| Publications Last 5 Years
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Mpelasoka, B.; Schachtman, D.; Treeby, M . and Thomas, M. (2003) Potassium accumulation in the grape berry: A review. Australian Journal of Grape and Wine Research 9, 154-168.
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Storey R.; Jones R.G.W.; Schachtman, D.P. and Treeby M.T. (2003) Calcium-accumulating cells in the meristematic region of grapevine root apices. Functional Plant Biology 30, 719-27.
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Treeby, M. T and Storey, R. ( 2002) Calcium spray treatments for ameliorating albedo breakdown in navel oranges. Australian Journal of Experimental Agriculture 42, 495-502.
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Storey, R. and Treeby, M.T . (2002) Cryo-SEM study of the early symptoms of peteca in Lisbon lemon Journal of Horticultural Science and Biotechnology 77, 551-556.
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Storey, R.; Treeby, M.T and Milne, D.J. (2002) Creasing: Another Ca related disorder? Journal of Horticultural Science and Biotechnology 77, 565-571.
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Zerihun, A. and Treeby, M.T. (2002) Biomass distribution and nitrate assimilation responses to N supply of Vitis vinifera L. cv. Cabernet Sauvignon on five Vitis rootstock genotypes. Australian Journal of Grape and Wine Research 8, 157-162.
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Storey, R. and Treeby, M.T . (2002) N utrient uptake into navel oranges during fruit development. Journal of Horticultural Science and Biotechnology 77, 91-99.
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Treeby, M.T . (2001) Sultana fruitfulness: responses to rootstock and nitrogen supply. Australian Journal of Experimental Agriculture 41, 681-687.
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Storey, R. and Treeby, M.T . (2000) Seasonal changes in nutrient concentrations of navel orange fruit. Scientia Horticulturae 84, 67-82.
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