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Rootstock effects on scion phenotypes in a 'Chambourcin' experimental vineyard
Zoë Migicovsky1, Zachary N Harris2,3, Laura L Klein2,3
11Department of Plant and Animal Sciences, Faculty of Agriculture, Dalhousie University, Truro, NS B2N 5E3 Canada.
Horticulture Research
|May 10, 2019
Summary
Grafting influences grapevine leaf shape and ion content, with rootstock and irrigation interacting significantly. Gene expression also shows rootstock-specific patterns, revealing complex root-shoot interactions in
Area of Science:
- Plant Biology
- Horticulture
- Agricultural Science
Background:
- Root systems critically influence shoot phenotypes, impacting crop resilience.
- Grafting, a technique joining rootstock and scion, offers a model to study organ system interactions.
Purpose of the Study:
- To investigate how rootstocks affect 'Chambourcin' grapevine leaf morphology, ion concentrations, and gene expression.
- To understand the complex rootstock-scion interactions in Vitis L.
Main Methods:
- Grafting 'Chambourcin' scions onto three rootstocks (SO4, 1103P, 3309C).
- Analyzing leaf shape, ion concentrations, and gene expression under varying irrigation treatments over two years.
- Comparing grafted vines to ungrafted controls.
Main Results:
- Rootstock and irrigation significantly interacted to influence leaf shape.
- Leaf position was the primary driver of ion concentration variation, with rootstock and irrigation interactions also significant.
- Grafted vines exhibited distinct, rootstock-specific gene expression patterns compared to ungrafted vines.
Conclusions:
- Grafting has subtle yet complex effects on grapevine leaf morphology, ionomics, and gene expression.
- Rootstock choice and environmental conditions like irrigation are crucial factors in modulating scion traits.
- This study enhances understanding of rootstock-scion communication for developing improved grapevine cultivars.