Grapevines are frequently classified as isohydric or anisohydric in an attempt to portray their water relations strategy. However, despite the popularity of the iso/anisohydric classification, the underlying biology remains unclear. In this presentation, I will present a simple hydraulic model, field measurements, and the extensive literature on grapevine hydraulics to illustrate that the iso/anisohydric classification depends on the definition used and the environment in which it is grown, rather than describing an intrinsic property of the plant itself. I argue that abandoning the iso/anisohydric terminology and returning to a more fundamental hydraulic framework would provide a stronger foundation for cultivars comparisons.

1. Dr. Uri Hochberg
Making (Non)sense of Grapevine Cultivars Classification into Iso/anisohydric
Volcani Institute, Agricultural Research Organization, Israel
Related products
- Viticulture in a Changing Climate. Session 2. High-Throughput/Omics Perspectives of Grapevine Response to Stress
5. Dr. Maria Mar Alsina Marti
Using Remote Sensing to Monitor Vine Water Status in a Production Environment: Opportunities and Challenges
E&J Gallo Winery, USA
- Viticulture in a Changing Climate. Session 2. High-Throughput/Omics Perspectives of Grapevine Response to Stress
4. Dr. Noam Reshef
Controlling Fruit Sourness in a Changing Climate: Genetic Loci, Genes, and Metabolic Changes Associated with Grape Malate Levels
Volcani Institute, Agricultural Research Organization, Israel
- Viticulture in a Changing Climate. Session 2. High-Throughput/Omics Perspectives of Grapevine Response to Stress
3. Prof. Lawrence Hipps
Coherent Interactions of Turbulence and Microclimate in Irrigated Vineyards
Utah State University, USA
- Viticulture in a Changing Climate. Session 2. High-Throughput/Omics Perspectives of Grapevine Response to Stress
6. Dr. Or Sperling
Droughts’ Instantaneous and Lasting Effects on Grapevines’ Water Use
Volcani Institute, Agricultural Research Organization, Israel