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Nicotiana plumbaginifolia plants silenced for the ATP-binding cassette transporter gene NpPDR1 show increased susceptibility to a group of fungal and oomycete pathogens
- Source :
- Molecular plant pathology. 10(5)
- Publication Year :
- 2009
-
Abstract
- SUMMARY The behaviour of Nicotiana plumbaginifolia plants silenced for the ATP-binding cassette transporter gene NpPDR1 was investigated in response to fungal and oomycete infections. The importance of NpPDR1 in plant defence was demonstrated for two organs in which NpPDR1 is constitutively expressed: the roots and the petal epidermis. The roots of the plantlets of two lines silenced for NpPDR1 expression were clearly more sensitive than those of controls to the fungal pathogens Botrytis cinerea, Fusarium oxysporum sp., F. oxysporum f. sp. nicotianae, F. oxysporum f. sp. melonis and Rhizoctonia solani, as well as to the oomycete pathogen Phytophthora nicotianae race 0. The Ph gene-linked resistance of N. plumbaginifolia to P. nicotianae race 0 was totally ineffective in NpPDR1-silenced lines. In addition, the petals of the NpPDR1-silenced lines were spotted 15%-20% more rapidly by B. cinerea than were the controls. The rapid induction (after 2-4 days) of NpPDR1 expression in N. plumbaginifolia and N. tabacum mature leaves in response to pathogen presence was demonstrated for the first time with fungi and one oomycete: R. solani, F. oxysporum and P. nicotianae. With B. cinerea, such rapid expression was not observed in healthy mature leaves. NpPDR1 expression was not observed during latent infections of B. cinerea in N. plumbaginifolia and N. tabacum, but was induced when conditions facilitated B. cinerea development in leaves, such as leaf ageing or an initial root infection. This work demonstrates the increased sensitivity of NpPDR1-silenced N. plumbaginifolia plants to all of the fungal and oomycete pathogens investigated.
- Subjects :
- food.ingredient
Soil Science
Plant Science
Flowers
Plant disease resistance
Genes, Plant
Plant Roots
Microbiology
Rhizoctonia solani
food
Gene Expression Regulation, Plant
Fusarium oxysporum
Botany
Tobacco
Gene Silencing
Nicotiana plumbaginifolia
Molecular Biology
Botrytis cinerea
Botrytis
Glucuronidase
Plant Proteins
Oomycete
biology
fungi
food and beverages
Original Articles
Phytophthora nicotianae
biology.organism_classification
Plant Leaves
Oomycetes
ATP-Binding Cassette Transporters
Agronomy and Crop Science
Subjects
Details
- ISSN :
- 13643703
- Volume :
- 10
- Issue :
- 5
- Database :
- OpenAIRE
- Journal :
- Molecular plant pathology
- Accession number :
- edsair.doi.dedup.....ae8a98ba7ca440dca63750085bd5ff4a