Cvikrová M., Malá J., Hrubcová M., Eder J.
PLANT SCIENCE
170:
563-570,
2006
Klíčová slova:
Ascocalyx abietina (Lagerberg); Lignin; Norway spruce; Soluble and cell wall-bound phenolics; Peroxidase
Abstrakt:
This study was conducted to identify the defence-related alterations in phenylpropanoid pathway in Norway spruce trees naturally infected with
Ascocalyx abietina (Lagerberg). The results show differences in accumulation of soluble and cell wall-bound phenolics, contents of lignin and total
peroxidase activities in the bark collected from three distinct regions of infected branches. The sites of the A. abietina infection, the browning
reaction zones, were characterised by significantly higher levels of free and cell wall-bound phenolic acids, higher amount of lignin and lower
peroxidase activities when compared with zones localised 20–30 mm from the margin of browning area and regions of infected branches that were
not in contact with the pathogen. On the rise of phenolic contents in the reaction zones participated predominately derivatives of cinnamic acid, in
particular p-coumaric acid, content of which increased by about 2.3- and 3.0-fold compared to the controls grown on two different stands in Karlu°v
vrch and Velka´ Desˇtna´. Pronounced accumulation of ester- and glycoside-bound benzoic acid derivatives (namely p-hydroxybenzoic and
protocatechuic acids) was observed in regions of infected branches that were not in contact with the pathogen. The induction of biochemical
response in these healthy looking zones of branches from infected trees might represent a systemic induction of phenylpropanoid accumulation in
A. abietina infected Norway spruces.
Autoři z ÚEB: Milena Cvikrová,
Marie Hrubcová
Čeština
English