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.
Rossouw, G., Smith, J., Barril, C., Deloire, A. & Holzapfel, B. 2017. Carbohydrate distribution during berry ripening of potted grapevines: Impact of water availability and leaf-to-fruit ratio. In: Scientia Horticulturae. 216, p. 215-225 11 p.
Mahmud, K., Rogiers, S., Guisard, Y., Smith, J., Nielsen, S. & Holzapfel, B. 2017. Circadian rhythms in grapevine root and shoot growth and their modulation by photoperiod and temperature. In: Journal of Plant Physiology.
Rossouw, G. C., Smith, J. P., Barril, C., Deloire, A. & Holzapfel, B. P. 01 Mar 2017. Implications of the presence of maturing fruit on carbohydrate and nitrogen distribution in grapevines under postveraison water constraints. In: Journal of the American Society for Horticultural Science. 142, 2, p. 71-84 14 p.
Gourieroux, A. M., Holzapfel, B. P., McCully, M. E., Scollary, G. R. & Rogiers, S. Y. 2017. Vascular development of the grapevine (Vitis vinifera L.) inflorescence rachis in response to flower number, plant growth regulators and defoliation. In: Journal of Plant Research. 130, 5, p. 873-883 11 p.
View all Bruno Holzapfel's publications at CRO