Elicitiny: klíčové molekuly interakcí rostlin a patogenů

  • P. Moricová Katedra biochemie, Přírodovědecká fakulta Univerzity Palackého, Olomouc
  • L. Luhová Katedra biochemie, Přírodovědecká fakulta Univerzity Palackého, Olomouc
  • J. Lochman Ústav biochemie, Přírodovědecká fakulta Masarykovy Univerzity, Brno
  • T. Kašparovský Ústav biochemie, Přírodovědecká fakulta Masarykovy Univerzity, Brno
  • M. Petřivalský Katedra biochemie, Přírodovědecká fakulta Univerzity Palackého, Olomouc
Klíčová slova: elicitiny, elicitory, kryptogein, nekróza, obranné mechanismy rostliny, steroly

Abstrakt

Elicitors, endogenous compounds produced by microbial pathogens, induce defence responses in plants. They rank among chemically nonuniform groups including proteins, glycoproteins, oligo- and polysaccharides and lipids. By multiple mechanisms, elicitors are capable of triggering various modes of plant defence like oxidative burst, hypersensitive response, increased expression of pathogenesis-related proteins and the production of antimicrobial compounds – phytoalexins. Elicitins, secreted by oomycetes from Phytophthora and Pythium spp., are small (10 kDa) protein elicitors structurally similar to lipid-transfer proteins of plant cells and behaving like sterol carrier proteins. In the host plant, elicitins induce a hypersensitive response and development of acquired systemic resistance to many microbial phytopathogens. The review summarizes the current knowledge of the molecular modes of elicitin interaction with plant cells, with a special emphasis on cryptogein as a model elicitin for potential application in the induction of systemic plant resistance.

Publikované
2014-12-15
Sekce
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