ISHS Acta Horticulturae 388: International Symposium on Viticulture and Enology
ROOTSTOCK EFFECTS ON GROWTH, DRY WEIGHT PARTITIONING AND MINERAL NUTRIENT CONCENTRATION OF GRAPEVINE1. |
| Authors: | J. Tardáguila, M. Bertamini, C. Giulivo, A. Scienza |
| Keywords: | Dry weight partitioning, mineral nutrients, rootstock, growth, Vitis vinifera L. |
| Abstract:
Leaf area, shoot growth, dry weight partitioning and mineral nutrient concentration of all vine organs were determined on Vitis vinifera L., cv Cabernet Sauvignon, grafted on 101-14 Mgt, 420A and 41B rootstocks at harvest. 41B developed the largest total leaf area and 101-14 induced a premature smaller leaf fall than another two rootstocks (50%) at harvest time. Between anthesis and harvest 101-14 induced the smallest and 41B the largest growth of primary shoots. Rootstock affected dry weight partitioning among the organs. 420A accumulated the lowest (660 g) and 41B the highest (854g) dry weight, 101-14 showed the highest leaf efficiency (180 g dry weight m-2 leaf area). Significant differences in concentration of mineral nutrients were observed both among plant organs and rootstocks. 101-14 had a lower nitrogen concentration in roots, primary and lateral shoots, and in petioles; considering the total content per vine, K/N appared to be the highest in this rootstock. The effect of rootstock on mineral concentration of leaves and petioles may be relevant by evaluating vine nutrient status. | |
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