期刊
JOURNAL OF EXPERIMENTAL BOTANY
卷 73, 期 5, 页码 1288-1300出版社
OXFORD UNIV PRESS
DOI: 10.1093/jxb/erab489
关键词
Arbuscular mycorrhizal symbiosis; carbon; ectomycorrhizal symbiosis; legumes; nitrogen; nutrient transport; phosphorus; split-root; trees
资金
- AFRI program from the USDA National Institute of Food and Agriculture [2020-67013-31800]
- North Carolina Soybean Producers Association [2019-1656]
- North Carolina Agriculture Research Service (NCARS)
This review compiles and discusses the methods and applications of split-root assays in the study of arbuscular mycorrhizal and ectomycorrhizal symbioses, highlighting their importance in understanding mycorrhizal associations.
Most land plants symbiotically interact with soil-borne fungi to ensure nutrient acquisition and tolerance to various environmental stressors. Among these symbioses, arbuscular mycorrhizal and ectomycorrhizal associations can be found in a large proportion of plants, including many crops. Split-root assays are widely used in plant research to study local and systemic signaling responses triggered by local treatments, including nutrient availability, interaction with soil microbes, or abiotic stresses. However, split-root approaches have only been occasionally used to tackle these questions with regard to mycorrhizal symbioses. This review compiles and discusses split-root assays developed to study arbuscular mycorrhizal and ectomycorrhizal symbioses, with a particular emphasis on colonization by multiple beneficial symbionts, systemic resistance induced by mycorrhizal fungi, water and nutrient transport from fungi to colonized plants, and host photosynthate allocation from the host to fungal symbionts. In addition, we highlight how the use of split-root assays could result in a better understanding of mycorrhizal symbioses, particularly for a broader range of essential nutrients, and for multipartite interactions. Split-root assays have been used in the study of mycorrhizal associations to investigate colonization events, hydromineral transport from symbiotic fungi to plants, and carbon allocation from the host to mycorrhizal fungi.
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