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Plant Parasitism and Resistance
Research Guide
What is Plant Parasitism and Resistance?
Plant Parasitism and Resistance is the study of strigolactones, a group of plant hormones, in signaling pathways that regulate shoot branching, root development, mycorrhizal symbiosis, and interactions with parasitic plants, including their biosynthesis, perception, effects on environmental stress responses, and molecular and evolutionary mechanisms.
Research on Plant Parasitism and Resistance encompasses 48,039 works focused on strigolactones' roles in plant hormone signaling. These pathways influence shoot branching, root development, mycorrhizal symbiosis, and parasitic plant interactions. Studies examine strigolactone biosynthesis via the carotenoid pathway, perception by proteins like DWARF14, and connections to karrikins and host recognition.
Topic Hierarchy
Research Sub-Topics
Strigolactone Biosynthesis Pathways
This sub-topic examines the enzymatic steps and genetic regulation in the carotenoid-derived biosynthesis of strigolactones in plants. Researchers investigate key genes like CCD7 and CCD8 and their role in producing strigolactones for shoot branching and parasitic plant interactions.
Strigolactone Perception by DWARF14
This sub-topic focuses on the DWARF14 receptor protein's role in perceiving strigolactones and initiating downstream signaling cascades. Researchers study receptor-ligand interactions and signaling complexes involving MAX2 and D53/SMXL repressors.
Strigolactones in Mycorrhizal Symbiosis
This sub-topic explores how strigolactones act as signaling molecules for mycorrhizal fungi colonization of plant roots. Researchers analyze gene expression changes and symbiotic benefits under nutrient stress conditions.
Strigolactone Effects on Shoot Branching
This sub-topic investigates strigolactone-mediated inhibition of shoot branching via auxin transport modulation. Researchers use mutants like max and d mutants to dissect hormonal crosstalk.
Strigolactone Signaling in Parasitic Plants
This sub-topic studies how root-exuded strigolactones trigger germination and haustorium formation in parasitic plants like Striga and Orobanche. Researchers explore host detection mechanisms and resistance strategies.
Why It Matters
Strigolactones mediate host recognition by parasitic plants, enabling infection processes that impact crop yields in agriculture. Phillips and Hayman (1970) developed methods for clearing roots and staining parasitic and vesicular-arbuscular mycorrhizal fungi, allowing rapid assessment of infection levels critical for evaluating resistance in host plants. Lanoue et al. (2010) identified induced root-secreted phenolic compounds as belowground defenses, which plants deploy against rhizosphere invaders including parasitic organisms. These mechanisms intersect with biotic invasions, as Mack et al. (2000) outlined causes and control of species that proliferate to environmental detriment, relevant to managing parasitic plant spread. Jones and Dangl (2006) detailed the plant immune system, providing foundational understanding of resistance pathways that counter parasitism alongside hormonal signaling.
Reading Guide
Where to Start
"Improved procedures for clearing roots and staining parasitic and vesicular-arbuscular mycorrhizal fungi for rapid assessment of infection" by Phillips and Hayman (1970), as it offers practical methods essential for visualizing and quantifying parasitic infections, forming the basis for resistance studies.
Key Papers Explained
Phillips and Hayman (1970) establish staining techniques for assessing parasitic fungi infections, foundational for later works. Jones and Dangl (2006) in "The plant immune system" link these to broader resistance signaling, including hormonal overlaps. Lanoue et al. (2010) in "Induced root-secreted phenolic compounds as a belowground plant defense" build on this by detailing chemical defenses in the rhizosphere. Berendsen et al. (2012) in "The rhizosphere microbiome and plant health" extend to microbial modulation of defenses. Mack et al. (2000) in "BIOTIC INVASIONS: CAUSES, EPIDEMIOLOGY, GLOBAL CONSEQUENCES, AND CONTROL" contextualizes parasitism as invasion, connecting to agricultural impacts.
Paper Timeline
Most-cited paper highlighted in red. Papers ordered chronologically.
Advanced Directions
Research centers on strigolactone-DWARF14 interactions in root signaling, with no recent preprints available. Current frontiers emphasize integrating immune system insights from Jones and Dangl (2006) with rhizosphere defenses from Berendsen et al. (2012). No news coverage reports shifts in the past 12 months.
Papers at a Glance
| # | Paper | Year | Venue | Citations | Open Access |
|---|---|---|---|---|---|
| 1 | The plant immune system | 2006 | Nature | 12.7K | ✓ |
| 2 | An update of the Angiosperm Phylogeny Group classification for... | 2016 | Botanical Journal of t... | 9.4K | ✓ |
| 3 | Improved procedures for clearing roots and staining parasitic ... | 1970 | Transactions of the Br... | 8.3K | ✕ |
| 4 | Importance of pollinators in changing landscapes for world crops | 2006 | Proceedings of the Roy... | 6.8K | ✓ |
| 5 | Global pollinator declines: trends, impacts and drivers | 2010 | Trends in Ecology & Ev... | 6.1K | ✕ |
| 6 | BIOTIC INVASIONS: CAUSES, EPIDEMIOLOGY, GLOBAL CONSEQUENCES, A... | 2000 | Ecological Applications | 6.1K | ✕ |
| 7 | Evidence for the Existence of Three Primary Strategies in Plan... | 1977 | The American Naturalist | 5.6K | ✕ |
| 8 | Induced root-secreted phenolic compounds as a belowground plan... | 2010 | Plant Signaling & Beha... | 5.5K | ✓ |
| 9 | Abiotic Stress Signaling and Responses in Plants | 2016 | Cell | 5.4K | ✓ |
| 10 | The rhizosphere microbiome and plant health | 2012 | Trends in Plant Science | 5.0K | ✓ |
Frequently Asked Questions
What role do strigolactones play in parasitic plant interactions?
Strigolactones serve as signaling molecules exuded by host plant roots for recognition by parasitic plants, triggering germination and attachment. This process is central to host-parasite dynamics in Plant Parasitism and Resistance studies. DWARF14 protein mediates their perception in responsive plants.
How are strigolactones biosynthesized in plants?
Strigolactone biosynthesis occurs via the carotenoid pathway in plant roots. This pathway produces hormones that regulate shoot branching and symbiotic associations. Key enzymes link it to responses against parasitic plants.
What methods assess parasitic and mycorrhizal infections in roots?
"Improved procedures for clearing roots and staining parasitic and vesicular-arbuscular mycorrhizal fungi for rapid assessment of infection" by Phillips and Hayman (1970) provides standardized techniques. These enable quantification of fungal colonization in host tissues. The methods support studies of resistance to both parasitic plants and symbionts.
How do root defenses counter parasitic interactions?
"Induced root-secreted phenolic compounds as a belowground plant defense" by Lanoue et al. (2010) shows phenolics secreted in response to rhizosphere threats. These compounds deter invaders including parasitic plants. They function independently of aboveground immune responses.
What is the plant immune system's role in parasitism resistance?
"The plant immune system" by Jones and Dangl (2006) describes layered defenses against pathogens and parasites. These include recognition and signaling pathways overlapping with strigolactone effects. The system underpins host resistance to parasitic plants.
How does the rhizosphere microbiome influence parasitism?
"The rhizosphere microbiome and plant health" by Berendsen et al. (2012) explains microbial communities shaping root defenses. These interact with strigolactone signaling to modulate parasitic plant access. Beneficial microbes enhance resistance outcomes.
Open Research Questions
- ? How do strigolactone signaling variations across angiosperm families affect susceptibility to parasitic plants, considering APG IV classifications?
- ? What molecular interactions between DWARF14 and root-secreted phenolics determine resistance thresholds to parasitic infection?
- ? How do biotic invasion dynamics alter strigolactone-mediated host recognition in changing agricultural landscapes?
- ? In what ways do rhizosphere microbiomes reprogram strigolactone pathways to confer heritable resistance against parasites?
- ? How do stress-signaling cross-talks with strigolactones evolve novel resistance strategies in Grime's plant strategies framework?
Recent Trends
The field maintains 48,039 works with no reported 5-year growth rate.
No recent preprints from the last 6 months or news coverage in the past 12 months indicate steady focus on established papers like Phillips and Hayman and Jones and Dangl (2006).
1970Keyword emphasis persists on strigolactones, DWARF14, and parasitic plant signaling.
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