Originally developed to combat phylloxera, rootstocks are now being researched as a solution to one of viticulture’s challenges: drought. Dr. Suraj Kar, Assistant Professor of Viticulture at Cal Poly San Luis Obispo, explores the 150-year history of rootstocks and their evolving purpose. He explains the complex influence rootstocks have on drought tolerance, vine vigor, and fruit set—and how long-term research is identifying those best suited to support vine longevity in a changing climate.

Resources:

110: How to Develop a New Vineyard Site
171: How to Farm Wine Grapes for Climate Change
Differences in grapevine rootstock sensitivity and recovery from drought are linked to fine root cortical lacunae and root tip function
Foundation Plant Sciences Grape Registry: Grapevine Varieties
Irrigation and rootstock effects on the phenolic concentration and aroma potential of Vitis vinifera L. cv. Cabernet Sauvignon grapes
Researchers pinpoint drought-resistant traits in grape rootstocks
Root pressure–volume curve traits capture rootstock drought tolerance
Suraj Kar, Ph.D
The influence of grapevine rootstocks on scion growth and drought resistance

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281: How Rootstock Impacts Vine Drought Tolerance and Longevity

Sustainable Winegrowing