Premium
Changes in abscisic acid, salicylic acid and phenylpropanoid concentrations during cold acclimation of androgenic forms of Festulolium ( Festuca pratensis × Lolium multiflorum ) in relation to resistance to pink snow mould ( Microdochium nivale )
Author(s) -
Pociecha E.,
Płażek A.,
Janowiak F.,
Waligórski P.,
Zwierzykowski Z.
Publication year - 2009
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1111/j.1439-0523.2009.01664.x
Subject(s) - biology , festuca pratensis , abscisic acid , acclimatization , frost (temperature) , festuca rubra , botany , salicylic acid , festuca , lolium multiflorum , abiotic component , lolium , horticulture , agronomy , poaceae , lolium perenne , ecology , biochemistry , geomorphology , gene , geology
We investigated changes in concentrations of abscisic (ABA) and salicylic acid (SA), phenolic compounds and phenylalanine ammonia‐lyase (PAL) activity in relation to cold‐induced tolerance of four androgenic genotypes of Festulolium ( Festuca × Lolium hybrids ) to frost and to the snow mould fungus Microdochium nivale . Cold acclimation increased frost tolerance and resistance to snow mould. Resistant genotypes were characterized by higher ABA concentrations during the first 54 h of cold acclimation and lower concentrations of SA than susceptible genotypes. After cold acclimation, the content of phenolics was significantly lower in genotypes tolerant to frost and M. nivale infection than in susceptible genotypes, while PAL activity was significantly higher. Signalling networks controlling cold acclimation to frost (abiotic) and mould infection (biotic) appears to involve increases in foliar concentrations of ABA and decreases in the SA level during successful cold acclimation. Higher PAL activity and lower concentrations of phenolic compounds also appear to be associated with enhanced tolerance to frost and fungal attack.