Karrikins are a family of compounds produced by wildfires that can stimulate the germination of dormant seeds of plants from numerous families. Seed plants could have 'discovered' karrikins during fire-prone times in the Cretaceous period when flowering plants were evolving rapidly. Recent research suggests that karrikins mimic an unidentified endogenous compound that has roles in seed germination and early plant development. The endogenous signalling compound is presumably not only similar to karrikins, but also to the related strigolactone hormones.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4687367 | PMC |
| http://dx.doi.org/10.1186/s12915-015-0219-0 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Identification and structure-guided development of triazole urea-based selective antagonists of Arabidopsis karrikin signaling.
Nat Commun
January 2025
Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan.
The smoke-derived butenolides, karrikins (KARs), regulate many aspects of plant growth and development. However, KARs and a plant hormone, strigolactones (SLs), have high resemblance in signal perception and transduction, making it hard to delineate KARs response due to the shortage of chemical-genetic tools. Here, we identify a triazole urea KK181N1 as an inhibitor of the KARs receptor KAI2.
View Article and Find Full Text PDFIdentification of osmotic stress resistance mediated by in apple.
Front Plant Sci
December 2024
Xinjiang Production and Construction Corps, Shihezi University, Shihezi, China.
KAR (Karrikin), a novel plant growth regulator, can be recognized specifically by plants and can activate resistance responses. MdKAI2 is the natural receptor of KARs in apple. Here, we report the identification of osmotic stress resistance in via the method of genetic transformation.
View Article and Find Full Text PDFEffects of biochar, N-enriched biochar and urea on tomato seed germination, vegetative growth, and fruit traits.
J Sci Food Agric
November 2024
Department of Soil and Water Conservation and Organic Waste Management, CEBAS-CSIC, Murcia, Spain.
Background: Agronomic uses of biochar have been intensely explored in the last 15 years. Recently, a new generation of biochar-based fertilizers has been developed. Raw biochar (BCH), nitrogen-enriched biochar (N + BCH) or urea were added to a coir fiber-based substrate for tomato cultivation, to assess seed germination, growth and fruiting of two cultivars (Cuarenteno and Moneymaker).
View Article and Find Full Text PDFIn Vitro vs. In Vivo Transcriptomic Approach Revealed Core Pathways of Nitrogen Deficiency Response in Tea Plant ( (L.) Kuntze).
Int J Mol Sci
October 2024
Agrarian and Technological Institute, Peoples' Friendship University of Russia, 117198 Moscow, Russia.
Article Synopsis
- The study utilized a novel experimental design to identify key biological pathways affected by nitrogen deficiency in an evergreen tree crop, highlighting processes like lignin biosynthesis and defense responses.
- The research found significant upregulation of the MAPK pathway and ATP-binding cassette transporters, with a greater focus on calcium signaling over hormone signaling, particularly involving auxin and abscisic acid.
- A total of 45 transcription factors were increased under nitrogen deficiency, indicating a shared regulatory role in both nitrogen and pathogen responses, especially in relation to flavanoids and cell wall integrity.
HTL/KAI2 signaling substitutes for light to control plant germination.
PLoS Genet
October 2024
Department of Cell & Systems Biology, University of Toronto, Toronto, Canada.
Plants monitor multiple environmental cues, such as light and temperature, to ensure they germinate at the right time and place. Some specialist plants, like ephemeral fire-following weeds and root parasitic plants, germinate primarily in response to small molecules found in specific environments. Although these species come from distinct clades, they use the same HYPOSENSITIVE TO LIGHT/KARRIKIN INSENSITIVE 2 (HTL/KAI2) signaling pathway, to perceive different small molecules suggesting convergent evolution on this pathway.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!