Abstract
Introduction The maize (Zea mays L.) is one of the most important comestible and fodder plant in the World. In Hungary yearly we produce cca. 500.000 t maize in 1.200.000 ha. The best hybrid breeds are able to produce the highest yield and the primest quality among optimal environmental circumstances. The maize is an ailogamic plant, thus the amount of yield is influenced by the viability of pollens responsible for fertilization. The viability of pollen is genetically determined, but the environmental factors have great impact as well. We are discussing in this paper about the relationship between the viability of maize pollen and the fertilization. Corn pollens are classified into the so-called short-lived pollens' group (Pfundt 1910, Holman-Brubaker 1926, Vasil 1961, Kozaki 1975 in Barnabfis 1982). In our experiments we investigated the effects of UV irradiations, the N-fertilization and the moisture on the viability of pollens.
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