Specialisation: Grapevine nutrition and carbohydrate physiology
Focus area: Nutrient/carbohydrate dynamics and berry composition
The carbohydrate and nutrient reserve pool of the perennial structure of grapevines is determined by internal requirements for growth, the production of assimilates and nutrient acquisition. The inter and intra seasonal changes are mediated through processes of translocation, accumulation and mobilisation of carbohydrates and nutrients, with the depletion and replenishment of reserves during the growing season influenced by the vineyard environment and by viticultural practices. In addition, the stored reserves of the perennial structure are critical for providing a buffer against contingencies that reduce the assimilatory capacity of the canopy and the nutrient uptake of the roots. The focus of the research is on the understanding of the reserve dynamics within and between seasons and the influence of cultural practises on reserves in relation to vine development and grape production.
Holzapfel BP and Smith JP (2012) Developmental stage and climatic factors impact more on carbohydrate reserve dynamics of Shiraz than cultural practice. Am. J. Enol. Vitic. 63:333-342.
Schmidtke LM, Smith JP, Müller MC and Holzapfel B (2012) Rapid Monitoring of grapevine reserves using ATR-FT-IR and chemometrics. Analytica Chimica Acta 732:16-26.
Holzapfel BP, Smith JP, Field SK and Hardie WJ (2010) Dynamics of Carbohydrate Reserves in Cultivated Grapevines. Hort. Reviews 36:143-211.
Smith JP, Schmidtke LM, Müller MC and Holzapfel BP (2014) Measurement of nutrient concentrations in grapevine petioles by ATR-FT-IR spectroscopy and chemometrics. Aust. J. Grape & Wine Res. 20:299-309
Holzapfel B and Treeby M (2013) Vineyard and winery indicators of Shiraz must fermentation behaviour. Vitis 52:97-104.