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Proteomic analysis of the Mycocentrospora acerina-carrot interaction during storage

LOUARN, Sébastien; Jensen, Birgit; NAWROCKI, Arkadiusz and NØRREGAARD JENSEN, Ole (2008) Proteomic analysis of the Mycocentrospora acerina-carrot interaction during storage. Paper at: Proteomlux 2008, Luxembourg, 22 to 25 October 2008.

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Summary

During post harvest storage, a large proportion of carrots (more than 50%) may have to be discarded due to the development of liquorice rot caused by Mycocentrospora acerina. This fungus is soil borne and brought into the store in to soil adhering to the root. Liquorice rot development is mainly related to physiological or structural resistance of carrot, therefore the control of this storage disease is based on cultural practices and storage conditions.
It is believed that carrots at the beginning of storage can resist disease developments due to chemical defence mechanisms involving some proteins, peptides and secondary metabolites. The hypothesis is that proteome changes during storage of carrots are related to the susceptibility to M. acerina. During root-pathogen interactions, several genes have been reported to provide resistance against pathogens but only few proteins have been identified using proteomic approaches. Little is known about proteins involved during M. acerina - carrot interaction.
The carrots used in this study are grown under two different agricultural practices (one conventional, one organic) in order to investigate the effect of the cropping system on the susceptibility to liquorice rot.
We developed a bioassay for infection studies of M. acerina on conventional and organic carrots in order to determine the important time points of the infection process. Then the proteome is investigated at these different time points. The protocol for extraction of proteins has been improved so that it can be used to obtain an optimal recovery of proteins from both plant and pathogen on their own as well as from infected carrot roots. Proteomes of carrot and of M. acerina are characterized by two dimensional gel electrophoreses and the proteins whose synthesis varies significantly in the course of pathogen infection are identified by mass spectrometry (MALDI TOF-TOF).


EPrint Type:Conference paper, poster, etc.
Type of presentation:Paper
Subjects: Crop husbandry > Crop health, quality, protection
Crop husbandry > Post harvest management and techniques
Crop husbandry > Production systems > Vegetables
Crop husbandry > Production systems > Root crops
Research affiliation: Denmark > DARCOF III (2005-2010) > VEGQURE - Organic cropping Systems for Vegetable production
Deposited By: LOUARN, Sébastien
ID Code:16216
Deposited On:21 Sep 2009 11:53
Last Modified:12 Apr 2010 07:40
Document Language:English
Status:Published
Refereed:Not peer-reviewed

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