Karrikins Identified in Biochars Indicate Post-Fire Chemical Cues Can Influence Community Diversity and Plant Development
| Autor: | Gavin R. Flematti, Jitka Kochanek, Allan Lisle, Rowena L. Long |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
Leaves lcsh:Medicine Lactuca Plant Science Plant Reproduction 01 natural sciences Lycopersicon Disasters Solanum lycopersicum Seed Germination Vegetables Biochar lcsh:Science Flowering Plants Plant Growth and Development 2. Zero hunger Multidisciplinary biology Plant Anatomy food and beverages Plant physiology Agriculture Biodiversity 04 agricultural and veterinary sciences Lettuce Plants Karrikin Germination Charcoal Plant Physiology Seeds Research Article Crops Brassica Solanum Fires Fruits Tomatoes Botany Furans Pyrans lcsh:R Organisms Biology and Life Sciences 15. Life on land biology.organism_classification Seedlings Seedling 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Dormancy lcsh:Q Crop Science Developmental Biology 010606 plant biology & botany |
| Zdroj: | PLoS ONE, Vol 11, Iss 8, p e0161234 (2016) PLoS ONE |
| ISSN: | 1932-6203 |
| DOI: | 10.1371/journal.pone.0161234 |
| Popis: | Background Karrikins are smoke-derived compounds that provide strong chemical cues to stimulate seed germination and seedling growth. The recent discovery in Arabidopsis that the karrikin perception system may be present throughout angiosperms implies a fundamental plant function. Here, we identify the most potent karrikin, karrikinolide (KAR1), in biochars and determine its role in species unique plant responses. Methods Biochars were prepared by three distinct commercial-scale pyrolysis technologies using systematically selected source material and their chemical properties, including karrikinolide, were quantified. Dose-response assays determined the effects of biochar on seed germination for two model species that require karrikinolide to break dormancy (Solanum orbiculatum, Brassica tourneforttii) and on seedling growth using two species that display plasticity to karrikins, biochar and phytotoxins (Lactuca sativa, Lycopersicon esculentum). Multivariate analysis examined relationships between biochar properties and the plant phenotype. Findings and Conclusions Results showed that karrikin abundant biochars stimulated dormant seed germination and seedling growth via mechanisms analogous to post-fire chemical cues. The individual species response was associated with its sensitivity to karrikinolide and inhibitory compounds within the biochars. These findings are critical for understanding why biochar influences community composition and plant physiology uniquely for different species and reaffirms that future pyrolysis technologies promise by-products that concomitantly sequester carbon and enhance plant growth for ecological and broader plant related applications. |
| Databáze: | OpenAIRE |
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