Tobacco susceptibility to Potato virus Y(NTN) infection is affected by grafting and endogenous cytokinin content
Jazyk angličtina Země Irsko Médium print-electronic
Typ dokumentu časopisecké články, práce podpořená grantem
PubMed
25900563
DOI
10.1016/j.plantsci.2015.02.017
PII: S0168-9452(15)00061-8
Knihovny.cz E-zdroje
- Klíčová slova
- Antioxidant system, Cytokinin, Malic enzyme, Peroxidase, Salicylic acid, ipt gene,
- MeSH
- chiméra MeSH
- cytokininy genetika metabolismus MeSH
- geneticky modifikované rostliny MeSH
- interakce hostitele a patogenu * MeSH
- kořeny rostlin MeSH
- kyselina salicylová metabolismus MeSH
- listy rostlin MeSH
- nemoci rostlin * MeSH
- odolnost vůči nemocem * MeSH
- peroxid vodíku metabolismus MeSH
- peroxidasa metabolismus MeSH
- Potyvirus * MeSH
- regulátory růstu rostlin metabolismus MeSH
- Solanum tuberosum MeSH
- tabák genetika metabolismus virologie MeSH
- zemědělství metody MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Názvy látek
- cytokininy MeSH
- kyselina salicylová MeSH
- peroxid vodíku MeSH
- peroxidasa MeSH
- regulátory růstu rostlin MeSH
Faster or stronger response to pathogen occurs if plants undergo prior priming. Cytokinins seem to be also involved in plant priming and in response to pathogens. Susceptibility to Potato virus Y(NTN) (PVY(NTN)) was studied in transgenic cytokinin overproducing (Pssu-ipt) tobacco and compared with nontransgenic plants. Since cytokinin overproduction inhibits development of plant roots and grafting overcomes this limitation, both types were grown as rooted and/or grafted plants to check also the effect of grafting. Control rooted tobacco (C), the most susceptible to PVY(NTN), showed always symptoms during the infection together with the rising virus content and a systemic response, such as accumulation of H2O2, salicylic acid (SA) and other phenolic acids, and stress-induced enzyme activities. In transgenic and grafted plants, the response to PVY(NTN) was dependent on protective mechanisms activated prior to the inoculation. In Pssu-ipt tobacco, cytokinin active forms and SA contents exceeded manifold their content in C. Grafting promoted the accumulation of phenolics, but SA, and stimulated peroxidase activities. Thus, the pre-infection barrier established in both transgenic and grafted plants helped to suppress partly the virus multiplication and resulted in milder symptom development. However, only the synergic effect of both grafting and the high cytokinins led to PVY(NTN) tolerance in transgenic grafts. Possible mechanisms were discussed.
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