Water and nutritional savings shape non-structural carbohydrates in grapevine (Vitis vinifera L.) cuttings
Global changes and sustainability challenge researchers in saving water and nutrients. The response of woody crops, which can be forced at facing more drought events during their life, is particularly important. Vitis vinifera can be an important model for its relevance in countries subjected to climate changes and its breeding, requiring cuttings plantation and strong pruning.
Drought leads to an impairment between growth and reserves which can be a key point in the survival of plantings. This work aims at understanding the role of non-structural carbohydrates (NSC) in: i) the maintenance of hydraulic function in cuttings subjected to water deficit and limited nitrogen: ii) identify the best regime of water and nitrogen to achieve a correct compromise between plant growth and NSC.
Cuttings of two different cultivars and three rootstocks of grapevine, were grown in pots under different water and nitrogen regimes. During the vegetative season, morphological and physiological traits were measured. Particularly, NSC content analysis were performed in roots, rootstocks, shoots and canes on blooming and on cane ripening period.
During early vegetative phases, plants under water deficit shown a reduced growth and lower water potential respect well-watered plants. At the end of the vegetative season, NSC was affected also by the type of cultivar or rootstock. Nitrogen does not seem to have any effect on carbohydrates content.
Our results suggest that imposing a controlled water deficit to grapevine from budburst, can support plants to accumulate NSC, useful to help cutting survival and face incoming drought events.
Issue: ICGWS 2023
1University of Trieste, Department of Life Sciences, Via Licio Giorgieri 5, 34127 Trieste, Italy
2University of Udine, Department of Food, Environmental, and Animal Sciences, Via delle Scienze 206, 33100 Udine, Italy
3VCR Research center, Via Ruggero Forti, 33095, San Giorgio della Richinvelda, Italy