The trans‐kingdom communication of noncoding RNAs in plant–environment interactions

• Published in: The plant genome Vol. 16; no. 4; pp. e20289 - n/a
• Main Authors: Liu, Ting, Xu, Liu‐Gen, Duan, Cheng‐Guo
• Format: Journal Article
• Language: English
• Published: United States John Wiley & Sons, Inc 01-12-2023; Wiley
• Subjects: Abiotic stress; DNA methylation; Gene expression; Gene-Environment Interaction; Genomes; Kinases; Legumes; Microorganisms; MicroRNAs; Non-coding RNA; Pathogens; Plants - genetics; Plants - metabolism; Potatoes; Proteins; RNA Interference; RNA polymerase; RNA, Plant; RNA, Untranslated - genetics; RNA-binding protein; RNA-mediated interference; Symbiosis; Transfer RNA; Virulence
• ISSN: 1940-3372; 1940-3372
• DOI: 10.1002/tpg2.20289

As conserved regulatory agents, noncoding RNAs (ncRNAs) have an important impact on many aspects of plant life, including growth, development, and environmental response. Noncoding RNAs can travel through not only plasmodesma and phloem but also intercellular barriers to regulate distinct processes. Increasing evidence shows that the intercellular trans‐kingdom transmission of ncRNAs is able to modulate many important interactions between plants and other organisms, such as plant response to pathogen attack, the symbiosis between legume plants and rhizobia and the interactions with parasitic plants. In these interactions, plant ncRNAs are believed to be sorted into extracellular vesicles (EVs) or other nonvesicular vehicles to pass through cell barriers and trigger trans‐kingdom RNA interference (RNAi) in recipient cells from different species. There is evidence that the features of extracellular RNAs and associated RNA‐binding proteins (RBPs) play a role in defining the RNAs to retain in cell or secrete outside cells. Despite the few reports about RNA secretion pathway in plants, the export of extracellular ncRNAs is orchestrated by a series of pathways in plants. The identification and functional analysis of mobile small RNAs (sRNAs) are attracting increasing attention in recent years. In this review, we discuss recent advances in our understanding of the function, sorting, transport, and regulation of plant extracellular ncRNAs.
Core Ideas
Summarizing the reported phenomena of mobile noncoding RNAs involved in plant‐environment interactions.
Updating the molecular mechanism underlying trans‐kingdom RNA interference and the antagonistic mechanism.
Pointing out the unsolved scientific questions underlying trans‐kingdom RNA interference and the perspective in future studies.