Split down the middle: studying arbuscular mycorrhizal and ectomycorrhizal symbioses using split-root assays

Area of Science:

• Plant biology
• Mycology
• Ecology

Background:

• Most land plants form symbiotic relationships with soil fungi for nutrient acquisition and stress tolerance.
• Arbuscular and ectomycorrhizal symbioses are common in many plant species, including crops.
• Split-root assays are established methods for studying local and systemic plant responses.

Purpose of the Study:

• To review and discuss the application of split-root assays in mycorrhizal symbiosis research.
• To highlight the utility of split-root assays for investigating arbuscular and ectomycorrhizal symbioses.
• To emphasize the potential of split-root assays for understanding multipartite interactions and nutrient transport.

Main Methods:

• Compilation and discussion of existing literature on split-root assays in mycorrhizal studies.
• Focus on assays examining multiple symbiont colonization, systemic resistance, nutrient/water transport, and photosynthate allocation.
• Analysis of how split-root assays can be further utilized.

Main Results:

• Split-root assays have been underutilized in mycorrhizal symbiosis research.
• These assays are valuable for studying colonization by multiple beneficial symbionts.
• They provide insights into systemic resistance, nutrient/water transport, and host-fungal resource exchange.

Conclusions:

• Split-root assays offer a powerful approach to dissecting complex mycorrhizal symbioses.
• Further application of these assays can enhance understanding of nutrient uptake and multipartite interactions.
• This methodology can reveal crucial details about plant-fungal communication and resource allocation.