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Die Wirkung von Kinetin, Abscisinsäure und Kationen auf die Wirt‐Parasit‐Beziehungen bei Gerste, die mit Erysiphe graminis f. sp. hordei inokuliert war
Author(s) -
EDWARDS H. H.
Publication year - 1983
Publication title -
journal of phytopathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 60
eISSN - 1439-0434
pISSN - 0931-1785
DOI - 10.1111/jph.1983.107.1.22
Subject(s) - haustorium , hordeum vulgare , kinetin , biology , abscisic acid , inoculation , botany , host (biology) , erysiphe graminis , stem rust , poaceae , horticulture , cultivar , tissue culture , biochemistry , ecology , gene , in vitro
Kinetin, abscisic acid (AbA), and several cations were tested to determine what effect they have on resistance and susceptibility in detached primary leaf segments of barley ( Hordeum vulgare L.) floating on water and inoculated with conidia of Erysiphe graminis f. sp. hordei Marchal, race CR3. Two nearly isogenic lines of Manchuria barley (Ml‐a, resistant and ml‐a, susceptible) were used for comparison. In both lines kinetin (0.1 mM) solution increased resistance. In Ml‐a AbA (0.1 mM) increased susceptibility. The increased susceptibility was the result of greater formation of apparently functional primary haustoria. The action of kinetin was antagonized by AbA and vice versa . Of the cations tested, Ca++, Mn++, and La+++ increased susceptibility in the Ml‐a line. These cations stimulated a greater production of secondary haustoria. None of the cations tested increased resistance. Combinations of AbA and cations were tested. AbA plus Mn++ or La+++ made the Ml‐a host as susceptible to the fungus as the ml‐a host. Senescence as measured by chlorophyll content was not correlated with susceptibility or resistance in either isogenic line.