The makings of a gradient: spatiotemporal distribution of gibberellins in plant development
| Autor: | Annalisa Rizza, Alexander M. Jones |
|---|---|
| Přispěvatelé: | Rizza, Annalisa [0000-0002-1896-7688], Jones, Alexander [0000-0002-3662-2915], Apollo - University of Cambridge Repository |
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
0301 basic medicine Time Factors Plant Development Plant Science Biology 01 natural sciences Models Biological Article 03 medical and health sciences Arabidopsis Plant Cells Cell growth food and beverages Biological Transport biology.organism_classification Gibberellins Transport protein Cell biology Plant development 030104 developmental biology Germination Plant species Gibberellin Spatiotemporal resolution 010606 plant biology & botany |
| Zdroj: | Current Opinion in Plant Biology |
| Popis: | Highlights • Patterning of biosynthesis, catabolism and transport determines gibberellin distributions. • The first gibberellin transporters have only recently been discovered. • Novel methods are revealing spatiotemporal distributions of gibberellins in vivo. • Gibberellin gradients can be generated independently of biosynthesis patterns. • In some tissues, gibberellin levels correlate with cell elongation rates. The gibberellin phytohormones regulate growth and development throughout the plant lifecycle. Upstream regulation and downstream responses to gibberellins vary across cells and tissues, developmental stages, environmental conditions, and plant species. The spatiotemporal distribution of gibberellins is the result of an ensemble of biosynthetic, catabolic and transport activities, each of which can be targeted to influence gibberellin levels in space and time. Understanding gibberellin distributions has recently benefited from discovery of transport proteins capable of importing gibberellins as well as novel methods for detecting gibberellins with high spatiotemporal resolution. For example, a genetically-encoded fluorescent biosensor for gibberellins was deployed in Arabidopsis and revealed gibberellin gradients in rapidly elongating tissues. Although cellular accumulations of gibberellins are hypothesized to regulate cell growth in developing embryos, germinating seeds, elongating stems and roots, and developing floral organs, understanding the quantitative relationship between cellular gibberellin levels and cellular growth awaits further investigation. It is also unclear how spatiotemporal gibberellin distributions result from myriad endogenous and environmental factors directing an ensemble of known gibberellin enzymatic and transport steps. |
| Databáze: | OpenAIRE |
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