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- W2072977282 abstract "Distribution of assimilates in cultivars of spring barley with different resistance against powdery mildew (Erysiphe graminis f. sp. hordei) Transport and distribution of radioactive labelled assimilates in spring barley cultivars with different degrees of resistance to powdery mildew were studied after 14CO2-treatment of single leaves. Plants of the cultivars ‘Amsel’ (susceptible), ‘Asse’ (adult plant resistant), and ‘Rupee’ (resistant) were analyzed at the vegetative growth stage (5. leaf unfolded) and the generative growth stage (anthesis). At the vegetative growth stage the assimilate export from the mildew inoculated 5. leaf of ‘Amsel’ and ‘Rupee’ is decreased; in ‘Asse’, there is no considerable change of assimilate distribution due to infection. At the generative growth stage the assimilate export from the infected flag leaf of ‘Amsel’ is reduced when the fungus, is sporulating. In the cultivar ‘Asse’ the assimilates are bound at the infection site until the seventh day after inoculation, then the transport of assimilates to the ear is increased. In ‘Rupee’ mildew inoculation causes an enhanced assimilate transport to the ear. The changes in assimilate distribution due to mildew inoculation are discussed with respect to the different types of host-parasite-interactions and the source-sink-activities in the different cultivars. Der Assimilathaushalt von Sommergerstensorten mit unterschiedlicher Resistenz gegenüber dem Echten Mehltau wurde anhand des Transportes und der Verteilung radioaktiv markierter Assimilate nach Begasung mit 14CO2 untersucht. Die Sorten ‘Amsel’ (anfällig), ‘Asse’ (altersresistent), und ‘Rupee’ (resistent) wurden mit und ohne Mehltauinokulation im vegetativen Sudium (5. Blatt entfaltet) und generativen Stadium (Blüte) miteinander verglichen. Im vegetativen Stadium ist der Assimiktexport aus dem infizierten Blatt bei den Sorten ‘Amsel’ und ‘Rupee’ vermindert, ‘Asse’ zeigt keine Veränderungen. Im generativen Stadium ist der Assimiktexport aus dem befallenen Fahnenblatt der Sorte ‘Amsel’ zum Zeitpunkt der Spomlation des Pilzes vermindert. In ‘Asse’ werden die Assimilate bis zum 7. Tage nach Inokulation am Infektionsort gebunden; danach tritt ein verstärkter Transport in die Ähre ein. In ‘Rupee’ bewirkt die Pilzinokulation einen verstärkten Assimilattransport in die Ähre. Die Veränderungen des Assimilathaushaltes nach Mehltauinokulation werden in Verbindung mit den sortenbedingten source-sink-Verhältnissen diskutiert." @default.
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- W2072977282 date "1987-08-01" @default.
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- W2072977282 title "Assimilatverteilung in Sommergerstensorten mit unterschiedlicher Resistenz gegenüber dem Echten Mehltau (Erysiphe graminis f. sp. hordei)" @default.
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- W2072977282 doi "https://doi.org/10.1111/j.1439-0434.1987.tb04403.x" @default.
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