Rosette core fungal resistance in Arabidopsis thaliana
| Autor: | Wan-Ting Mao, Lye Meng Markillie, Galya Orr, Hugh D. Mitchell, Michael V. Kolomiets, Janet Braam, Yuan Liu, Huw A. Ogilvie, Matthew J. Gaffrey, Eli J. Borrego, Michael Huang, E. Wassim Chehab, Yanwan Dai |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
0301 basic medicine Arabidopsis Plant Science Biology Real-Time Polymerase Chain Reaction 01 natural sciences Petiole (botany) Rosette (botany) 03 medical and health sciences Abscission Plant Growth Regulators Botany Genetics Plant defense against herbivory Jasmonate Botrytis cinerea Disease Resistance Plant Diseases Gene Expression Profiling fungi food and beverages Biotic stress biology.organism_classification Plant Leaves 030104 developmental biology Botrytis 010606 plant biology & botany |
| Zdroj: | Planta. 250(6) |
| ISSN: | 1432-2048 |
| Popis: | Unlike rosette leaves, the mature Arabidopsis rosette core can display full resistance to Botrytis cinerea revealing the importance for spatial and developmental aspects of plant fungal resistance. Arabidopsis thaliana is a model host to investigate plant defense against fungi. However, many of the reports investigating Arabidopsis fungal defense against the necrotrophic fungus, Botrytis cinerea, utilize rosette leaves as host tissue. Here we report organ-dependent differences in B. cinerea resistance of Arabidopsis. Although wild-type Arabidopsis rosette leaves mount a jasmonate-dependent defense that slows fungal growth, this defense is incapable of resisting fungal devastation. In contrast, as the fungus spreads through infected leaf petioles towards the plant center, or rosette core, there is a jasmonate- and age-dependent fungal penetration blockage into the rosette core. We report evidence for induced and preformed resistance in the rosette core, as direct rosette core inoculation can also result in resistance, but at a lower penetrance relative to infections that approach the core from infected leaf petioles. The Arabidopsis rosette core displays a distinct transcriptome relative to other plant organs, and BLADE ON PETIOLE (BOP) transcripts are abundant in the rosette core. The BOP genes, with known roles in abscission zone formation, are required for full Arabidopsis rosette core B. cinerea resistance, suggesting a possible role for BOP-dependent modifications that may help to restrict fungal susceptibility of the rosette core. Finally, we demonstrate that cabbage and cauliflower, common Brassicaceae crops, also display leaf susceptibility and rosette core resistance to B. cinerea that can involve leaf abscission. Thus, spatial and developmental aspects of plant host resistance play critical roles in resistance to necrotrophic fungal pathogens and are important to our understanding of plant defense mechanisms. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink