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Ruffino, Alessandra, 2020. The role of terpenes produced by Brassica napus in interactions with Verticillium longisporum. Second cycle, A2E. Uppsala: SLU, Department of Plant Biology (from 140101)


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Abstract

Verticillium longisporum is responsible for severe yield losses, especially of oilseed
rape (Brassica napus). Rapeseed is the third most important source of vegetable oil
worldwide. The need to increase rapeseed oil yield is not only because is a source
of healthy vegetable oil but also because it is used as a biodiesel. The control of
Verticillium longisporum has been limited since this pathogen forms special resting
structures that survive in the soil for a long time and under harsh environment,
showing also delayed expression of symptoms. Volatile secondary metabolites
exuded by plant roots have been involved in plant-plant and plant-herbivore
signalling, while they affect fungal behaviour. For example, monoterpenes display
strong inhibitory or stimulatory activities on fungi. Previous analysis showed that a
group of V. longisporum genes are highly induced during application of
monoterpenes. In this study, RT-qPCR analysis of V. longisporum genes exposed
to terpenes produced by rapeseed plants, previously identified by RNAseq analysis
upon infection of rapeseed showed to be induced. Consistent with the previous
results, the Arabidopsis monoterpene mutant AT5G44630 (sesquiterpene synthase)
was more tolerant to Verticillium infection, suggesting an involvement of this gene
in disease development. An in vitro experiment showed that fungal biomass was
lower in mutant Arabidopsis lines compared to the wild type (WT) plants. Finally,
to produce rapeseed resistant plants to V. longisporum a clustered regulatory
interspaced short palindromic repeats (CRISPR/Cas9) construct to was generated
to produce rapeseed plants lacking the homologous AT5G44630 gene.

Main title:The role of terpenes produced by Brassica napus in interactions with Verticillium longisporum
Authors:Ruffino, Alessandra
Supervisor:Moschou, Panagiotis Nikolaou and Tzelepis, Georgios and Törnkvist, Anna
Examiner:Dubey, Mukesh
Series:UNSPECIFIED
Volume/Sequential designation:183
Year of Publication:2020
Level and depth descriptor:Second cycle, A2E
Student's programme affiliation:Other
Supervising department:(NL, NJ) > Department of Plant Biology (from 140101)
Keywords:Verticillium longisporum, terpenes, Brassica napus, Arabidopsis thaliana
URN:NBN:urn:nbn:se:slu:epsilon-s-16289
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-s-16289
Subjects:Pests of plants
Plant diseases
Language:English
Additional Information:ERAIT007 Università degli Studi di Catania
Deposited On:04 Dec 2020 10:38
Metadata Last Modified:05 Dec 2020 02:01

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