On the outside looking in: roles of endogenous and exogenous strigolactones
| Autor: | James Michael Bradley, Bruno Aquino, Shelley Lumba |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
0301 basic medicine Parasitic plant Plant Development Endogeny Plant Science 01 natural sciences Lactones 03 medical and health sciences Inorganic phosphate Plant Growth Regulators Mycorrhizae Signalling molecules Genetics Symbiosis Rhizosphere integumentary system biology fungi food and beverages Phosphorus Cell Biology 15. Life on land biology.organism_classification Cell biology Plant development Quorum sensing 030104 developmental biology Arbuscular mycorrhizal Heterocyclic Compounds 3-Ring 010606 plant biology & botany |
| Zdroj: | The Plant Journal. 105:322-334 |
| ISSN: | 1365-313X 0960-7412 |
| DOI: | 10.1111/tpj.15087 |
| Popis: | A collection of small molecules called strigolactones (SLs) act as both endogenous hormones to control plant development and as ecological communication cues between organisms. SL signalling overlaps with that of a class of smoke-derived compounds, karrikins (KARs), which have distinct yet overlapping developmental effects on plants. Although the roles of SLs in shoot and root development, in the promotion of arbuscular mycorrhizal (AM) fungal branching and in parasitic plant germination have been well characterized, recent data have illustrated broader roles for these compounds in the rhizosphere. Here, we review the known roles of SLs in development, growth of AM fungi and germination of parasitic plants to develop a framework for understanding the use of SLs as molecules of communication in the rhizosphere. It appears, for example, that there are many connections between SLs and phosphate utilization. Low phosphate levels regulate SL metabolism and, in turn, SLs sculpt root and shoot architecture to coordinate growth and optimize phosphate uptake from the environment. Plant-exuded SLs attract fungal symbionts to deliver inorganic phosphate (Pi) to the host. These and other examples suggest the boundary between exogenous and endogenous SL functions can be easily blurred and a more holistic view of these small molecules is likely to be required to fully understand SL biology. Related to this, we summarize and discuss evidence for a primitive role of SLs in moss as a quorum sensing-like molecule, providing a unifying concept of SLs as endogenous and exogenous signalling molecules. |
| Databáze: | OpenAIRE |
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