Рубрики:
BLUE-STAIN FUNGI
DEFENSE RESPONSES
CULTURES
PROANTHOCYANIDINS
ACCUMULATION
LIGNIN
ATTACK
FIR
Кл.слова (ненормированные):
coniferous trees of Siberia -- phytoimmunity -- calluses -- fungal elicitors -- hypersensitivity necrosis -- lignin
BLUE-STAIN FUNGI
DEFENSE RESPONSES
CULTURES
PROANTHOCYANIDINS
ACCUMULATION
LIGNIN
ATTACK
FIR
Кл.слова (ненормированные):
coniferous trees of Siberia -- phytoimmunity -- calluses -- fungal elicitors -- hypersensitivity necrosis -- lignin
Аннотация: The elicitor activity of compounds extracted from the mycelia of six species of phytopathogenic fungi was assessed from the sizes of necrotic lesions on the external surface of the living trunk phloem of five coniferous species inhabiting Siberia: Siberian larch (Larix sibirica L.), Scotch pine (Pinus sylvestris L.), Siberian spruce (Picea obovata Ledeb.), Siberian fir (Abies sibirica L.), and cedar pine (Pinus sibirica (Rupr.) Mayr.). The compounds for inoculation were extracted from the mycelium of ascomycetes imperfect, and basidium fungi; the living mycelia of these fungi were also used. The fungal extract or mycelium was placed into the hollows 7 mm in diameter in the trunk bark. Infection triggered the formation of hypersensitivity necrotic lesions in the inner bark exceeding in size those appeared after control wounding of four tree species (larch, pine, spruce, and cedar); fir was an exclusion. In experiments with tree trunks and conifer calluses, a dependence of immune response parameters (the sizes of necrotic lesions and the content of lignin and bound proanthocyanidins) on the quantity of the fungal preparation was elucidated. The largest necrotic lesions appeared after injection of 500 mu g of the fungal preparation into the hollow in the trunk, and its higher quantities did not increase the indices measured. The size of the necrotic lesion on the trunk bark is supposed to be used as a promising index characterizing the level of tree immunity and tolerance under various ecological conditions.
Полный текст,
WOS,
Scopus
Держатели документа:
[Polyakova, G. G.
Pashenova, N. V.
Polyakov, V. I.
Zrazhevskaya, G. K.] Russian Acad Sci, Sukachev Inst Forestry, Siberian Div, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Polyakova, G.G.; Pashenova, N.V.; Polyakov, V.I.; Zrazhevskaya, G.K.