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Proteomic changes and endophytic micromycota during storage of organically and conventionally grown carrots

LOUARN, Sébastien; Nawrocki, A.; Thorup-Kristensen, K.; Lund, O.S.; Jensen, O.N.; Collinge, D.B. and Jensen, B. (2013) Proteomic changes and endophytic micromycota during storage of organically and conventionally grown carrots. Postharvest Biology and Technology, 76, pp. 23-33.

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The physiological state of carrot roots during extended cold-storage is decisive for high postharvest quality. Wehave investigated differences in the proteome and micromycota of organically and conventionally grown carrots during six months of storage. The levels of only 15 proteins changed in level during storage. Proteins involved in cold stress adaptation and cytoskeleton components changed; these changes in specific protein levels occurred mainly during the first month demonstrating adaptation to storage conditions and that the carrots were subsequently stable, indicating stable carrot quality. The changes observed were similar in the two cropping systems. Using both biological isolation and a fungal PCR targeting the ITS region, we identified several endophytic species belonging to the Ascomycota. The most frequently encountered taxa were Tetracladium, Leptodontidium, Nectriaceae andPhomawhich areknownto occur as root endophytes or as root-associated fungi. As for the proteomics data, no consistent statistically significant differences in micromycota were observed between the two cropping systems. Weconclude that cropping system did not have an influence on the postharvest quality of the carrots during six months of cold storage.

EPrint Type:Journal paper
Subjects: Crop husbandry > Production systems > Vegetables
Crop husbandry > Crop health, quality, protection
Crop husbandry > Post harvest management and techniques
Research affiliation: Denmark > DARCOF III (2005-2010) > VEGQURE - Organic cropping Systems for Vegetable production
Denmark > KU - University of Copenhagen > KU-LIFE - Faculty of Life Sciences
Deposited By: Kristensen, Ph.D. Hanne Lakkenborg
ID Code:22846
Deposited On:11 Jun 2013 07:54
Last Modified:11 Jun 2013 07:56
Document Language:English
Refereed:Peer-reviewed and accepted

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