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Auxin and Cytokinin Metabolism and Root Morphological Modifications in Arabidopsis thaliana Seedlings Infected with Cucumber mosaic virus (CMV) or Exposed to Cadmium
- Source :
- International Journal of Molecular Sciences, International Journal of Molecular Sciences; Volume 14; Issue 4; Pages: 6889-6902, International Journal of Molecular Sciences, Vol 14, Iss 4, Pp 6889-6902 (2013)
- Publication Year :
- 2013
- Publisher :
- MDPI AG, 2013.
-
Abstract
- Arabidopsis thaliana L. is a model plant but little information is available about morphological root changes as part of a phytohormonal common response against both biotic and abiotic stressors. For this purpose, two-week-old Arabidopsis seedlings were treated with 10 mu M CdSO4 or infected with CMV. After 12 days the entire aerial parts and the root system were analyzed, and the presence of CMV or the accumulation of Cd were detected. Microscopic analysis revealed that both CMV and Cd influenced root morphology by a marked development in the length of root hairs and an intense root branching if compared to controls. Among the three treatments, Cd-treated seedlings showed a shorter root axis length and doubled their lateral root diameter, while the lateral roots of CMV-infected seedlings were the longest. The root growth patterns were accompanied by significant changes in the levels of indole-3-acetic acid, trans-zeatin riboside, dihydrozeatin riboside, as a probable consequence of the regulation of some genes involved in their biosynthesis/degradation. The opposite role on root development played by the phythormones studied is discussed in detail. The results obtained could provide insights into novel strategies for plant defense against pathogens and plant protection against pollutants.
- Subjects :
- Cytokinins
Arabidopsis thaliana
cadmium
Arabidopsis
Root system
Root hair
Cucumovirus
Plant Roots
Article
Catalysis
lcsh:Chemistry
Inorganic Chemistry
Gene Expression Regulation, Plant
Auxin
Botany
Plant defense against herbivory
Physical and Theoretical Chemistry
lcsh:QH301-705.5
Molecular Biology
Spectroscopy
chemistry.chemical_classification
Indoleacetic Acids
biology
Organic Chemistry
Lateral root
General Medicine
biotic stresses
biology.organism_classification
abiotic stresses
Computer Science Applications
cucumber mosaic virus (CMV)
Cucumber mosaic virus (CMV)
lcsh:Biology (General)
lcsh:QD1-999
chemistry
Seedlings
Seedling
Subjects
Details
- ISSN :
- 14220067
- Volume :
- 14
- Database :
- OpenAIRE
- Journal :
- International Journal of Molecular Sciences
- Accession number :
- edsair.doi.dedup.....ef2e99966104fa49356ac5accf32bb85