Analysis of apple epidermis in respect to ontogenic resistanceagainst Venturia inaequalis
2019
Zajicova, I. | Tihlarikova, E. | Cifrova, P. | Kyjakova, P. | Nedela, V. | Sechet, J. | Havelkova, L. | Kloutvorova, J. | Schwarzerova, K. | Department of Experimental Plant Biology ; Faculty of Science ; Univerzita Karlova [Praha, Česká republika] = Charles University [Prague, Czech Republic] (UK)-Univerzita Karlova [Praha, Česká republika] = Charles University [Prague, Czech Republic] (UK) | Institute of Scientific Instruments ; Czech Academy of Sciences [Prague] (CAS) | Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences (IOCB / CAS) ; Czech Academy of Sciences [Prague] (CAS) | Institut Jean-Pierre Bourgin (IJPB) ; Institut National de la Recherche Agronomique (INRA)-AgroParisTech | Research and Breeding Institute of Pomology Holovousy (VSUO) | Ministry of Agriculture, Czech RepublicQJ1510353Ministry of Education, Youth & Sports - Czech RepublicLO1417European CommissionEuropean Commission Joint Research CentreEuropean Community (EC)CZ.1.05/2.1.00/01.0017Chinese Academy of SciencesRVO:68081731Czech Academy of SciencesRVO: 61388963Grant Agency of the Czech Republic19-03909SAgreenSkillsPlus PCOFUND-GA-2013-609398LabEx Saclay Plant Sciences-SPS ANR-10-LABX-0040-SPS | ANR-10-LABX-0040,SPS,Saclay Plant Sciences(2010)
International audience
Mostrar más [+] Menos [-]Inglés. In order to understand mechanisms of ontogenic resistance to apple scab, we analyzed various aspects of young and old leaves. We have introduced an apple plants cultivation system where in vitro propagated and rooting explants produce a genetically uniform population of apple (Malus domestica cv. Idared) plants. In this work, we demonstrate that apple plants produced in our cultivation system showed susceptibility to Venturia inaequalis, the cause of apple scab disease in young leaves and resistance in old leaves, which is similar to orchard situation. Our analysis shows that the cessation of epidermal cell expansion and shape formation coincided with the onset of ontogenic resistance in older leaves. Formation of specific cuticular lamellar structures did not coincide with ontogenic resistance onset. Further, chemical composition analysis of wax from young susceptible and old resistant leaves did not reveal specific compounds involved in ontogenic resistance. Differences in homogalacturonan content in cell walls in susceptible and resistant cells as well as decreased methylesterification of pectin in resistant leaves suggest that polysaccharide composition of the cell wall may play a role in mycelium growth and nutrition.
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Este registro bibliográfico ha sido proporcionado por Institut national de la recherche agronomique