Definition

1. Noun:
   • A root or part of a root used for plant propagation: In horticulture, a rootstock is the part of a plant, often the root system and lower stem, onto which another plant (the scion) is grafted. It provides the root system for the grafted plant.
   • A horizontal plant stem with shoots above and roots below serving as a reproductive structure: In botany, a rootstock can also refer to a rhizome—a modified subterranean plant stem that sends out roots and shoots from its nodes, often used for asexual reproduction.

Usage Examples

• Noun:
  • The gardener selected a disease-resistant rootstock for grafting the rose variety.
  • The apple tree was grown on a dwarfing rootstock to control its size.
  • Plants like iris and ginger spread through their underground rootstocks.

Advanced Usage

• "Grafting onto a rootstock": A common horticultural practice where a desired plant variety (scion) is joined to a hardy or specially selected root system.
  • The vineyard uses a specific phylloxera-resistant rootstock for all its grapevines.

Variants and Related Words

• Rhizome (n): A more specific botanical term for a horizontal, usually underground stem that often functions as a rootstock for plant propagation and spread.
• Scion (n): The detached living portion of a plant (a bud or shoot) that is grafted onto the rootstock.
• Understock (n): A synonym for rootstock, particularly the part that provides the root system in grafting.

Synonyms

• Stock: Often used interchangeably with rootstock in a grafting context.
• Rhizome: Specifically for the horizontal, reproductive stem structure.
• Base: In a non-technical sense, the foundational part.

Related Phrases

• "Work on a rootstock": Refers to the practice of grafting a scion onto a specific rootstock.
  • This cherry cultivar works best when worked on a Mazzard rootstock.

Noun

1. root or part of a root used for plant propagation; especially that part of a grafted plant that supplies the roots
2. a horizontal plant stem with shoots above and roots below serving as a reproductive structure