Localized Vacuum Infiltration as a Size-Independent Platform for In Planta Transient Gene Expression: Highlight of...

Area of Science:

• Plant Biotechnology
• Molecular Biology
• Agricultural Science

Background:

• Vacuum-assisted agroinfiltration is a standard method for transient gene expression in plants.
• Current methods are limited to small plants that fit within a vacuum chamber, excluding large, woody, and perennial species.
• Transforming large, woody plants for functional genomics is challenging.

Purpose of the Study:

• To introduce a novel method for localized vacuum infiltration applicable to large, attached plant organs.
• To overcome the physical limitations of traditional vacuum infiltration techniques.
• To enable transient gene expression in woody perennial species.

Main Methods:

• A recently patented system and method for localized vacuum infiltration (MX2023015160A).
• Application of localized vacuum infiltration to attached organs of large plants.
• Demonstration in economically important fruit trees: avocado (Persea americana) and cacao (Theobroma cacao).

Main Results:

• Successful transient genetic expression in planta was achieved in avocado and cacao.
• The method enables localized infiltration regardless of plant size.
• First-time transient gene expression in mature, attached organs of woody perennial fruit trees.

Conclusions:

• The localized vacuum infiltration method overcomes previous size limitations for plant transformation.
• This advancement facilitates functional genomics studies in native physiological contexts for woody perennials.
• The invention extends the utility of transient gene expression techniques to previously inaccessible plant species.