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Growth of Gremmeniella abietina on artificial media simulating the effects of mineral nutrient imbalance of Scots pine
Author(s) -
Ylimartimo Anneli,
Haansuu P.
Publication year - 1993
Publication title -
european journal of forest pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.535
H-Index - 49
eISSN - 1439-0329
pISSN - 0300-1237
DOI - 10.1111/j.1439-0329.1993.tb00818.x
Subject(s) - scots pine , mycelium , nutrient , pathogen , proline , biology , canker , pinus <genus> , botany , amino acid , horticulture , chemistry , microbiology and biotechnology , ecology , biochemistry
Increased foliar N/K and N/Mg ratios are known to reduce the resistance of Pinus sylvestris to scleroderris canker caused by Gremmeniella abietina . The aim of this work was to study how such changes in nutrient levels affect the growth of the pathogen in vitro. The mycelium of the pathogen was grown on artificial media adjusted to simulate the changes in inorganic N, K, Mg and Ca and free amino acid concentrations in the host with nutritional imbalance. Increased concentrations of K and Ca reduced the mycelial growth of the pathogen, whereas a modest increase in the concentration of inorganic N increased the growth. Tenfold concentrations (compared with normal host levels) of arginine and glutamic acid, and up to one hundred‐fold concentrations of proline increased the mycelial growth. The results suggest, that nutrient imbalances may enhance the colonization of host tissues by G. abietina .