Brassica napus L. cultivars show a broad variability in their morphology, physiology and metabolite levels in response to sulfur limitations and to pathogen attack

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Weese, Annekathrin; Pallmann, Philip; Papenbrock, Jutta; Riemenschneider, Anja: Brassica napus L. cultivars show a broad variability in their morphology, physiology and metabolite levels in response to sulfur limitations and to pathogen attack. In: Frontiers in Plant Science 6 (2015), 9. DOI: http://dx.doi.org/10.3389/fpls.2015.00009

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Sum total of downloads: 290




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Abstract: 
Under adequate sulfur supply, plants accumulate sulfate in the vacuoles and use sulfur-containing metabolites as storage compounds. Under sulfur-limiting conditions, these pools of stored sulfur-compounds are depleted in order to balance the nitrogen to sulfur ratio for protein synthesis. Stress conditions like sulfur limitation and/or pathogen attack induce changes in the sulfate pool and the levels of sulfur-containing metabolites, which often depend on the ecotypes or cultivars. We are interested in investigating the influence of the genetic background of canola (Brassica napus) cultivars in sulfur-limiting conditions on the resistance against Verticillium longisporum. Therefore, four commercially available Brassica. napus cultivars were analyzed. These high-performing cultivars differ in some characteristics described in their cultivar pass, such as several agronomic traits, differences in the size of the root system, and resistance to certain pathogens, such as Phoma and Verticillium. The objectives of the study were to examine and explore the patterns of morphological, physiological and metabolic diversity in these Brassica. napus cultivars at different sulfur concentrations and in the context of plant defense. Results indicate that the root systems are influenced differently by sulfur deficiency in the cultivars. Total root dry mass and length of root hairs differ not only among the cultivars but also vary in their reaction to sulfur limitation and pathogen attack. As a sensitive indicator of stress, several parameters of photosynthetic activity determined by PAM imaging showed a broad variability among the treatments. These results were supported by thermographic analysis. Levels of sulfur-containing metabolites also showed large variations. The data were interrelated to predict the specific behavior during sulfur limitation and/or pathogen attack. Advice for farming are discussed.
License of this version: CC BY 4.0
Document Type: article
Publishing status: publishedVersion
Issue Date: 2015
Appears in Collections:Naturwissenschaftliche Fakultät

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pos. country downloads
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1 image of flag of Germany Germany 263 90.69%
2 image of flag of China China 8 2.76%
3 image of flag of No geo information available No geo information available 3 1.03%
4 image of flag of Netherlands Netherlands 2 0.69%
5 image of flag of France France 2 0.69%
6 image of flag of Switzerland Switzerland 2 0.69%
7 image of flag of Portugal Portugal 1 0.34%
8 image of flag of Mexico Mexico 1 0.34%
9 image of flag of Moldova, Republic of Moldova, Republic of 1 0.34%
10 image of flag of Brazil Brazil 1 0.34%
    other countries 6 2.07%

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